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[Sell]
Sell DM500S OEM unit |
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DM 500 OEM unit
Powerful receiver for digital TV and Radio programs.
available at present:
DM500 for satellite receiving
DM500 C for your cable connection
Main features are a 250 MHz PowerPC (350 Mips)
Linux OP, the Dreambox DM500 supports the Standard Linux API (DirectFB, Linux-FB, LIRC, ... )
The DM500 is the smallest digital Linux SetTopBox
10/100MBit compatible Ethernet Interface
DSL communication port
- 250 MHz PowerPC Processor (350 Mips)
- Linux Operating System
- 1 x Smartcard-Reader
- MPEG2 Hardware decoding
- available tuner DM500: DVB-S, DVB-C, DVB-T
- available tuner DM500+: DVB-S
- V.24/RS232 Interface
- 10/100Mbit compatible Ethernet Interface
- 2 LED status
- unlimited channel lists for TV/Radio
- channel-change time < 1 second
- full automatic service scan
- supports directly bouquet-lists
- supports EPG (electronic program guide)
- supports own videotext
- supports multiple LNB-Switching control (DiSEqC)
- fully adaptable OSD in many languages and skin-support
- S/PDIF Interface for digital bit stream out (AC-3)
- 1 x Scart-interfaces
only DM500+ :
- 32 MByte Flash
- 96 MByte RAM
DreamBox DM500 / DM500 + OEM unit technical data
DBS-Tuner:
Frequency Range 950 …. 2150 MHz
Signal Level - 65 dBm …. - 25 dBm
Signal-to-Noise Level 12 dB max.
DBS-Tuner Input Connector F-Type female
Input Impedance 75 Ohm
AFC +/- 3 MHz
Demodulation Shaped QPSK
FEC Viterbi and Reed-Solomon
Viterbirate 1/2, 2/3, 3/4, 5/6, 7/8
Roll-off Factor 35 %
Demultiplexing according ISO 13818-1 |
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» Posted by: AMG DIGITAL TECHNOLOGY CO.,LTD [China]  |
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[Sell]
Sell DM800 SE |
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Digitaler Satelliten-Empfangsreceiver für HD TV- und Radioprogramme.
Hauptmerkmal ist der 400 MHz starke Prozessor, die Dreambox DM 800 HD se unterstützt die Linux TV API
erleben Sie HighDefinition TV auf Ihrer Dreambox
•10/100MBit kompatibles Ethernet Interface
•HDMI Anschluss
•Plug&Play Tuner
•farbiges OLED Display
•Plug&Play Halterung für eine 2,5" SATA - Festplatte
Technische Daten
•400 MHz MIPS Prozessor
•Enigma 2, Linux Operating System
•farbige OLED - Anzeige
•MPEG-2 / H.264 Hardware decoding
•Tunervariante: DVB-S, optional: DVB-C, DVB-T
•Tuner Module, Plug&Play
•2 x Smartcard-Reader (Dreamcrypt CA)
•Mini USB
•10/100Mbit Ethernet Interface
•1 x Scart-Anschluss (RGB, FBAS oder S-Video)
•HDMI
•2 x USB 2.0 (Tastatur o.ä)
•analoges Modem
•S/PDIF optischer Anschluss
•64 MByte Flash, 256 MByte RAM
•Plug&Play Halterung für eine 2,5" SATA Festplatte
- Festplattenunterstützung für alle üblichen Größen (2,5" SATA)
•unlimitierte Kanalliste für TV/Radio
•Kanalwechsel in weniger als einer Sekunde
•automatischer Kanalsuchlauf
•Unterstützung von Bouquet-Listen
•EPG-Unterstützung (electronic program guide)
•eigener Videotext Decoder
•Unterstützung von mehrfach LNB-Umschaltung (DiSEqC)
•OSD in vielen Sprachen und Skin-Unterstützung
•externes 12V Stecker-Netzteil
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| » Posted by: AMG DIGITAL TECHNOLOGY CO.,LTD [China] |
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[Sell]
Sell DM800 HD (E-STAR sim card) |
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Powerful receiver for digital TV and Radio programs.
Main features are a 300 MHz processor
the Dreambox DM800 supports the Linux TV API
have a look to HighDefinition TV on your Dreambox
10/100MBit compatible Ethernet Interface
DVI connector
plug & play Tuner
brilliant OLED display
SATA for use either as internal HDD 2,5“ or eSATA
- 300 MHz MIPS Processor
- Linux Operating System
- OLED - Display
- MPEG-2 / H.264 Hardware decoding
- Tuner: DVB-S, optional: DVB-C, DVB-T
- Tuner Module, Plug&Play
- 1 x Smartcard-Reader
- V.24/RS232 Interface
- 10/100Mbit Ethernet Interface
- 1 x Scart (RGB, FBAS or S-Video)
- DVI
- 2 x USB 2.0
- analog modem
- S/PDIF Interface for digital bit stream out (AC-3)
- 64 MByte Flash, 256 MByte RAM
- SATA
- for use either as internal SATA HDD 2,5“
- or to use for extern eSATA
- unlimited channel lists for TV/Radio
- channel-change time < 1 second
- automatic service scan
- directly bouquet-lists
- EPG (electronic program guide)
- multiple LNB-Switching control (supports DiSEqC)
- OSD in many languages and skin-support
- Videotext Decoder
- extern 12V power supply |
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| » Posted by: AMG DIGITAL TECHNOLOGY CO.,LTD [China] |
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[Sell]
sell DM500S |
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1: 250 MHz IBM PowerPC Processor (350 Mips)
2: Linux Operating System
3: 1 x Smartcard-Reader
4: MPEG2 Hardware decoding
5: 100Mbit full duplex Ethernet Interface
6: 2 LED status
7: unlimited channel lists for TV/Radio
8: channel-change time < 1 second
9: full automatic service scan
10: supports directly bouquet-lists (indirect unlimited)
11: supports EPG (electronic program guide)
12: supports multiple LNB-Switching control (supports DiSEqC)
13: fully adaptable OSD in many languages (skin-support)
14: SPDI/F Interface for digital bit stream out (AC-3 / DTS)
15: 1 x Scart-interfaces (fully controlled by software) |
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| » Posted by: AMG DIGITAL TECHNOLOGY CO.,LTD [China] |
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[Sell]
AMWEI PTC Thermistor for Lighting Time Delay and Switching Starting Application |
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Lighting Switching PTC Thermistor Description
Lighting Switching PTC Thermistor are used when a load in series with the PTC thermistor has to be switched off after a time delay and when switching occurs frequently.
A typical application of switching PTC thermistor is the preheating of electrode in energy-saving lamps or fluorescent lamps. Switching PTC can also be used as a power resistor for loading a capacitor, for example in power supplies or in control units of production equipment.
Lighting Switching PTC thermistor Application
It's applicable to various types of fluorescent lamp, electronic ballast and electronic energy-saving lamp. The PTC can be connected across the lamp resonator without changing the circuits. It can change hard start of the ballast and electronic energy-saving lamp to preheated start and the preheating time of the filament can come up to 0.4-2 seconds, which will extend the service life of the fluorescent tube by over 4 times. |
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| » Posted by: AMWEI Thermistor [China] |
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[Sell]
AMWEI PTC Thermistor for Telecom Over-current Protection |
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Telecom PTC Thermistor Description
This series of ceramic PTC (positive temperature coefficient ) thermistors help provide protection against power cross, power induction surges and lighting surge defined in ITU, Telcordia, UL. Available in chip, radial-leaded coated and non-coated, SMD, twin vertical surface mount configuration. PTC thermistor overcurrent protector provides reversible, self-resetting protection against over-currents of telecommunication line protector units, improve the reliability of custom premises and network equipment.
Ceramic PTC thermistors can be found providing re-settable line protection at the exchange, monitoring hot spots and protecting ringers, battery feeds, transformers and relay circuits. Also used extensively to protect the mobile phone's battery pack against overcharging in land-based and radio mobile communications.
Advanced developments in telecom equipment in recent years have radically altered the protection requirements of both exchange and subscriber equipment. The PTC thermistor must protect the telephone line circuit against overcurrent, which may be caused by the following examples:
Surges due to lighting strikes on or near to the line plant.
Short-term induction of alternating voltage from adjactent power lines or railway systems, usually caused when these lines or systems develop faults
Direct contact between telephone lines and power lines.
To provide good protection under such conditions, a PTC thermistor is connected in series with each line, usually as secondary protection; However, even with primary line protection (usually a gas discharge tube), the PTC thermistor must fulfill severe requirements.
Surge pulses of upto 2KV can occur and in order to withstand short term power induction, the PTC thermistor must withstand high voltages. If the line has primary protection, a 220V to 300V PTC thermistor is adequate. Without primary protection, 600V PTC device is necessary. We can manufacture a series of PTC thermistor fulfilling both requirements.
Typical Application of PTC Thermistor in Telecommunication Protection
Central Office Switching Equipment (C.O): analog and digital line cards, POTS, T1/E1 equipment, xDSL modems and splitters, multiplexers, CSU/DSU, servers.
Primary Protection Modules: MDF (main distribution frame) modules, network interface devices (NIC).
Custom Premises Equipment, also known as subscriber terminal equipment (T.E.), IT equipment: Modem, phone sets, fax machines, phone wall outlet (plugs), alarm systems, answering machine, PBX systems, ADSL Splitters, internet appliance, POS terminals.
Access Network hardware, LAN WAN equipment, Powered Ethernet systems, VoIP (voice over IP equipment), integrated voice data (IVD), Set-top box (S.B), etc.
Telecom PTC Thermistor Features
Compliant with ITU-T K20 K21 K45
--Basic level lightning surges (10/700μs)
--Basic level power Induction (600V,1A,0.2S)
--Power contact criteria A/B (230V,15min.)
Suitable for continuous connection to main voltage 110/230 VAC in tripped (high ohmic) condition.
Round leadless disk thermistor availble for combined usage of PTC and primary protection, e.g gas arrestor.
Matching available with narrow resistance tolerance.
Tight resistance tolerance maintained after switching.
Negligible resistance drift after soldering or switching. |
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| » Posted by: AMWEI Thermistor [China] |
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[Sell]
AMWEI Radial Leaded, Epoxy Resin coated NTC Thermistor for Temperature Sensing, Measurement |
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Radial Leaded, Epoxy Resin coated NTC Thermistor Description:
AMWEI AMF52 series NTC thermistor in Radial Leaded, Epoxy Resin coated form, Standard pin wire is tinned copper brass wire, optional in tinned kinked steel wire, PVC wire, PTFE wire. Widely applied in temperature sensing, measurement, detection, indicator, monitoring, gauging, control, calibration and compensation, etc., suitable for HVAC and white goods, automotive, battery pack application.
AMWEI Radial Leaded, Epoxy Resin coated NTC Thermistor Features
High measurement accuracy.
Tight tolerance on resistance and Beta value.
Fast response, small dimension.
Can operate in long time stability.
Nominal resistance at 25C can be from 2k--150k ohm.
Operating temperature range: -45C -- +125C.
Radial Leaded, Epoxy Resin coated NTC Thermistor Application
In household electronics temperature measurement, detection and control: such as air conditioner, refrigerator, deep freezer, soybean milk machine, bread machine, drinking machine, etc.
Medical equipment and apparatus temperature sensing and measurement .
Temperature control instrument.
Electronic temperature humidity meter.
Automobile temperature measurement.
Electronic table calendar.
Battery pack and battery charger temperature measurement, compensation, control and protection |
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| » Posted by: AMWEI Thermistor [China] |
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[Sell]
AMWEI NTC Thermistors Temperature Sensor Probe Assemblies |
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NTC Thermistor can be assembled in housing in a variety of configurations for temperature sensing, measurement, detection, indicator, monitoring and control. Thermistor temperature sensor probe assemblies can conveniently attach to or be an integral part of any system to monitor or control temperature.The choice of assembly is dependent on the application. The primary factors which determine the optimum configuration of a thermistor assembly are the operating environment, mounting, time response and minimum dissipation constant.
The two factors which do vary considerably with thermistor sensor probe assembly design are time constant and dissipation constant. The time constant will typically be of greater duration in encapsulated thermistors. This is, of course, due to additional mass surrounding the thermistor element; therefore, extending the thermal transfer time. Dissipation constant will also be greater in assemblies. The additional housing mass serves well as a heat sink. Greater power is therefore required to induce self-heating. Both time constant and dissipation constant will vary with the selected thermistor and housing. Heat transfer properties of the housing, thermistor location, mass and wire type determine these constants.
Applications for temperature sensing include air temperature sensors, surface temperature sensors and immersion temperature sensors. Housings for air temperature sensors are often simple, inexpensive devices such as molded plastic shells, deep-drawn brass or aluminum cylinders, or even stainless steel tubes. Surface temperature sensors are designed to match the contour of the surface to be sensed, whether it's flat, curved, or round. Mounting holes or clips are often used to simplify installation of the sensor. Immersion temperature sensors are designed so that the sensing element will be surrounded by the medium to be sensed, often times a liquid. The sensing portion will normally protrude through a hole or orifice while a portion of the assembly will remain outside the medium to allow for the signal to be read. Immersion housings are usually threaded to allow them to be screwed into a hole or opening. Immersion part requests to be liquid and humidity prevention.
The material used for the housing will be dependent upon the temperature range needed, response time, cost, and special considerations such as UL, FDA or NSF requirements in food and/or medical applications. Some of the materials available include stainless steel, copper, plastic, teflon, brass, aluminum, epoxy and heat shrinkable tubing. |
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| » Posted by: AMWEI Thermistor [China] |
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[Sell]
AMWEI Inrush Current Limiting Power NTC Thermistors |
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Power NTC thermistor can be a cost effective device to limit the amount of inrush current in a switching power supply or other devices when the power is first turned on. Power NTC thermistor limits surge current by functioning as a power resistor which drops from a high cold resistance to a low hot resistance when heated by the current flowing through it.
Inrush-current limiters power NTC thermistor protect circuits from undesirably high currents, suppressing high inrush current surges, while its resistance remains negligible low during continuous operation. Thanks to their low resistance in the operating state, Power thermistor have a considerably lower power dissipation than the fixed resistors frequently used for this application.
Inrush Current Limiting Power NTC Thermistor Application
limiting surge current, suitable for the protection of switch mode power supply, UPS power, transformers, motors, various electric heating utensil, energy saving lights, ballast, various power circuit, amplifiers, colored displayer, monitors, color TV, filament protection, etc.
Power thermistor components can also be used for the soft starting of motors, for example in vacuum cleaners with continuous currents of up to 20 A.
Inrush Current Limiting Power NTC Thermistor Advantages:
Low cost solid state device for inrush current supression.
Minimise line current distortion and radio noise.
Protect switches, rectifier diodes and smoothing capacitors against premature failures.
Prevent fuse from blowing in error.
Inrush Current Limiting Power NTC Thermistor Features:
Resin coated disk thermistor with uninsulated lead-wires.
Suitable for both AC and DC circuits up to a voltage of 265 V(rms).
Wide range of resistance, current and dimension.
Excellent mechanical strength.
Suitable for PCB mounting. |
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| » Posted by: AMWEI Thermistor [China] |
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[Sell]
AMWEI PTC Thermistors Limit Temperature Sensor |
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PTC (positive temperature coefficient )thermistor switches at one particular temperature. Making use of the characteristics that the resistance of PTC thermistor increases sharply above curie temperature, when ambient temperature increases abnormally, protective circuit installed PTC thermistor will turn on or cut off loop through resistance changing, achieving thermal protection purpose. PTC thermistor protect such equipment and components as motors, transformers, power transistors and thyristors against over-temperature. A PTC thermistor is less expensive than a thermostat, and its switch temperature can be more accurately specified. It is also smaller and easier to design-in to electronic circuitry. Therefore PTC thermistor can be ideal devices for temperature detection, monitoring, indicating, limiting and over (excessive) temperature protection.
Typical Application of PTC Thermistor for Temperature Protection and temperature limiting sensors
Limit temperature measurement of Industrial electronics application.
Power supplies, switch power supply.
Home appliances, such as dish washers, washing machines, ironing machines, electric cookers, etc.
Electronic data processing and communications engineering (DC/DC converters).
Motor windings overheating Protection.
Automotive electronics.
Semiconductor heatsinks, enclosure panels, temperature-limited transistors.
Lighting applications.
PTC Thermistors Limit Temperature Sensor for Industrial Application
A PTC thermistor can be used effectively to detect whether a temperature limit in industrial equipment, liquids, etc, is exceeded. The PTC thermistor is mounted in thermal contact with the medium that has to be protected from overheating. When the rated temperature limit of the medium is reached, the resistance of PTC thermistor increases abruptly.In connection with a control unit, this signal can be used to automatically switch the power supply of a load.
Features of PTC Thermistor for Temperature Protection and temperature limiting sensors
2 Outlook construction: A-radial leaded epoxy resin coated form, B-metal tag lug form. Screw type metal cases or other construction can be made upon customer request.
PTC Thermistor Protection temperature: 60-130C
Quick response.
Long stability.
Small dimension, convenient for installation.
Do not need to be reset after protection. |
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| » Posted by: AMWEI Thermistor [China] |
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[Sell]
AMWEI Linear PTC Thermistors, Silicon temperature sensors |
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Linear PTC Thermistor (LPTC) resistance increases with the temperature rises in linearity, displays a virtually linear positive temperature coefficient over their entire temperature range, suitable in measurement and control system, temperature compensation. As the construction material is mainly semiconductor monocrystalline silicon, also called silicon temperature sensor, silicon thermistor, sometimes referred to as silistors. As the temperature coefficient is positive, the silicon temperature sensors exhibit fail-safe operation when a system overheats. Furthermore silicon is inherently stable, so silicon temperature sensor are extremely reliable and have very long operational lifetimes. Hermetically sealed glass package, axial leaded, 2 leads, can operate in high temperature and moisture environment. Linear PTC thermistor in small dimension, tightness, convenient for automatic installation.
AMWEI Linear PTC Thermistor (LPTC) Features:
1. Silicon temperature sensors have a TK (temperature coefficinet) which is nearly constant over the complete temperature range. Temperature coefficient：α25/50≥0.7%/C.
2. Excellent long term stability, annual diversification rate≤0.01C/per year, temperature drifts during the lifetime of silicon temperature sensor are negligible.
3. Thermal Time Constant: 10 seconds max in still air.
4. Operating temperature range：-40C--+150C.
5. Dissipation factor：2.5--5mW/C.
6. Maximum operating current：Iopr=1.0mA.
7. Rated power：10mW.
8. Resistance at 25C optional 600, 1000, 1600, 2000 ohm.
Silicon temperature sensor Application:
Industrial auotomation control equipment.
Home appliance temperature detection and compensation.
Precision circuit and crystal oscillator temperature compensation.
Temperature compensation of silicon semiconducting devices.
Temperature compensation of instrumentation amplifier.
A/D converter temperature compensation. · Micro motor timing control.
Automobile temperature detection and control.
Medical equipment temperature detection and control.
Linear PTC thermistor applications also include transmission, engine oil and coolant, heating system, overheating protection, amplifiers, power supplies, transducers, telemetry, computers, magnetic amplifiers, thermometry, meteorology, temperature regulation and over-temperature protection. |
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| » Posted by: AMWEI Thermistor [China] |
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[Sell]
Canon-PG-830 |
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| ink cartridge.canon-PG-830 Procut No.:PG-830 Color:Black Series:Canon Type: Reman ink volume: 7ml printer models: PIXMA iP1180 PIXMA iP1880 PIXMA iP1980 PIXMA iP2580 PIXMA iP2680 PIXMA MP145 PIXMA MP198 PIXMA MP228 PIXMA MP476 PIXMA MX308 PIXMA MX318 |
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| » Posted by: Ronghao photoelectricity technology Co.,LTD [China] |
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[Sell]
Fused Sillica Windows |
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Fused Sillica Windows
Fused silica is formed by chemical combination of silicon and oxygen. Advantages of fused silica material include good UV and IR transmission, low thermal expansion, providing stability and resistance to thermal shock over large temperature excursions, wider thermal operating range and high laser damage threshold. Used for windows, lenses, prisms and mirror substrates.
Specifications:
Material: UV grade Fused Silica
Dimension Tolerance: +0.0, -0.1mm
Thickness Tolerance: ± 0.1mm
Surface quality: 60/40(Standard), 10/5(High Precision)
Clear Aperture: >85%
Flatness: λ(Standard), λ/10(High Precision) per 25mm@633nm
Parallelism: 1' (Standard), 10" (High Precision)
Bevel: <0.25mm X 45°
Coating: Upon requirement
Typical Sizes:
Round Shape
Diameter(mm): Φ5.0；Φ10.0 ；Φ12.7；Φ15.0；Φ20.0；
Φ25.4；Φ30.0；Φ38.1；Φ50.8；Φ76.2
Square Shape:
WxH(mm) 5.0x5.0 ；10.0x10.0 ；15.0x15.0 ；
20.0x20.0；25.0x25.0；50.0x50.0
Thickness(mm): 0.5；1.0；1.5；2.0；3.0；
4.0；5.0；6.0；8.0；10.0
How to order Windows?
Example:
Material:N-BK7
Diameter:Φ25.4+0.0/-0.1mm
Thickness:1.0±0.1mm
Surface quality: 60-40 S/D
Flatness: λ/2 per 25mm @633nm
Paralelism: <1 arc minute
Coating:Both side AR,R<0.25% @1064nm, AOI=0°
Beamsplitter Cubes
Beamsplitter Plates
Polarization Beamsplitters
Beam Splitting coating
Dielectric High Reflection Coating
Dual-Wavelength Anti-reflection coating
Metallic High Reflection Coating
Multilayer Broadband Anti-reflection Coating
MultiLayer Sharp “V” Anti-reflection coating
Partial Reflection Coating
Single Layer MgF2 Anti-reflection Coating
Cr4+YAG Crystal
KTP crystal
Nd YAG Crystal
Bandpass Filters
Birefringent Filters
Colored glass Filters
Achromatic Lenses(Doublets)
Ball Lenses
Bi-Concave Lenses
Bi-Convex Lenses
Meniscus Lenses
Plano-Concave Cylindrical Lenses
Plano-Concave Lenses
Plano-convex Cylindrical Lenses
Plano-Convex Lenses
Powell Lenses
Rods Lenses(Light pipes)
B-270
BK7 Glass
Float Glass
Fused Silica
Dielectric Mirrors
Hot&Cold Mirror
Metallic Coated Mirrors (Al, Ag, Au)
Corner retroreflectors(Corner Cube Prisms)
Dove Prisms
Equilateral Dispersing Prisms
Penta Prisms
Right Angle Prisms
Special prisms
Wedge Prisms
Multiple order Waveplates
True Zero order Waveplates
Zero order Waveplates
BK7 Windows
CaF2 Windows
Fused Sillica Windows
Ge Windows
MgF2 windows
Sapphire Windows
Si Windows
optical windows
optical lenses
optical prisms
optical beamsplitters
optical mirrors
optical filters
optical waveplates
optical crystals
optical coating
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| » Posted by: [] |
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[Sell]
Dielectric Mirrors |
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Dielectric Mirrors
Dielectric Mirrors offer near total reflection, minimizing losses in nearly all optical systems. These coatings are very durable, easily cleaned, and resistant to laser damage.
Available either broadband or narrowband, they operate efficiently over 0–45°angle of incidence: AOI=0°, R>99.8%;
AOI=45°, R>99.5% (Rs>99.9%, Rp>99.2%).
Specifications:
Material: N-BK7 or UV Fused Silica
Dimension Tolerance: +0.0, -0.1mm
Thickness Tolerance: ± 0.1mm
Surface quality: 60/40(Standard), 10/5(High Precision)
Clear Aperture: >85%
Flatness: λ/4 per 25mm@633nm
Parallelism: <1'
Bevel: <0.25mm X 45°
Coating: One surface(S1) :HR @ design wavelength
The other surface :uncoated
Typical Sizes:
Size(mm) Size(mm)
Φ5.0x1.0 10.0x10.0x3
φ10.0x2.0 20.0x20.0x3
Φ12.7x2.0 25.4x25.4x3
Φ15.0x3.0 30.0x30.0x5
other sizes and shapes are available.
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| » Posted by: [] |
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[Sell]
Colored glass Filters |
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Cut-off type colored optical filter glass
The glass is named based on spectral characteristic of which is represented by the wavelength transmission limit. For example, if the transmission limit of glass is 490nm,then it is named as JB490.There are five groups and 35types glasses.
Selective absorption colored optical filter glass
This part of the glasses can be divided into 14 kinds and 78 types based on the color and application in this catalogue. The types are arranged in accordance with serial numbers, which have no special meaning.
Neutral filter glass
They are named based on the average transmissivity characteristics in 400nm to 700nm wavelength with 2mmthick sampler is 70%,then it's named as ZAB70.And there are ten types of glasses in this part. But three types of them(ZAB65,ZAB30,ZAB5)are tested in 440nm-660nm wavelength.
Specifications:
Material: Color glass
Dimension Tolerance: +0.0, -0.2mm
Thickness Tolerance: ±0.2mm
Surface quality: 80/50
Clear Aperture: >85%
Flatness: 1 λ per 25mm@633nm
Parallelism: ±3'
Bevel: <0.25mm X 45°
Coating: Upon requirement
Typical Sizes:
Size(mm) Size(mm)
Φ5.0x1.0 Φ20.0x3.0
φ10.0x2.0 Φ25.4x3.0
Φ12.7x2.0 Φ50.8x3.0
Φ15.0x3.0 Φ76.2x5.0
Other sizes and shapes are available.
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| » Posted by: [] |
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[Sell]
Birefringent Filters |
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Birefringent filter is made by crystal quartz. It's used in the laser cavity for wavelength selection. We can provide different thickness birefringent filter for our customer's laser applications.
Specifications:
Material: Crystal quartz
Dimension Tolerance: +0.0, -0.2mm
Thickness Tolerance: ± 0.02mm
Surface quality: 20/10
Clear Aperture: 90% of the central area
Parallelism: <5 arc sec
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| » Posted by: [] |
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[Sell]
Bandpass Filters |
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Bandpass filter plate are divided into short-pass and long-pass filters according to whether they transmit below or above the transition wavelength. The transition wavelength or cut-on/off wavelength is the wavelength at which the transmission is 50% of its peak value.
Specifications:
Material: N-BK7 ;Fused silica
Dimension Tolerance: +0.0, -0.1mm
Thickness Tolerance: ±0.1mm
Surface quality: 60/40
Clear Aperture: >85%
Parallelism: λ /4 per 25mm@633nm
Bevel: ±3'
Coating: One surface(S1) :HR & HT
The other surface(S2):Upon requirement
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| » Posted by: [] |
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[Sell]
Nd: YAG Crystal |
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Neodymium Doped Yttrium AIuminum Garnet (Nd: YAG) Crystal
Nd: YAG crystal is the most widely used solid-state laser material today. Now, we are able to stably supply quantity of Nd: YAG rods with high optical homogeneity, consistent performance, high processing accuracy and on time delivery.
1. Basic Properties (1.0 atm% Nd doped)
Chemical Formula Nd:Y3Al5O12
Crystal Structure Cubic
Lattice Constants 12.01 Å
Concentration ~ 1.2 x 1020 cm-3
Melting Point 1970 oC
Density 4.56 g/cm3
Mohs Hardness 8.5
Refractive Index 1.82
Thermal Expansion Coefficient 7.8 x 10-6 /K [111], 0 - 250 oC
Thermal Conductivity 14 W/m /K @20 oC, 10.5 W /m /K @100 oC.
Lasing Wavelength 1064 nm
Stimulated Emission Cross Section 2.8x10-19 cm-2
Relaxation Time of Terminal Lasing Level 30 ns
Radiative Lifetime 550 ms
Spontaneous Fluorescence 230 ms
Loss Coefficient 0.003 cm-1 @ 1064 nm
Effective Emission Cross Section 2.8 x 10-19 cm2
Pump Wavelength 807.5 nm
Absorption band at pump wavelength 1 nm
Linewidth 0.6 nm
Polarized Emission Unpolarized
Thermal Birefringence High
2. Standard Products specification
Dopant Concentration (atomic %): 0.9%~ 1.1%
Orientation: <111> crystalline direction (±5o)
Wavefront distortion:l/8 per inch, measured by a double-pass interferometer @ 633 nm
Extinction Ratio:
Rods with diameter from 3 mm to 6.35 mm and with length to 100 mm:>30dB
Rods with diameter from 7 mm to 10 mm and with length to 100 mm:>28dB
Dimension Tolerances
Rods with diameter: ±0.025 mm (±0.001"), Length: ±0.5 mm (±0.02")
Barrel Finish:50 80 micro-inch (RMS) , grooved rod barrel are also available
Ends Finish:
Surface Figure: <l/10 @ 633 nm
Parallelism: < 10 arc seconds
Surface quality:< 5 arc minutes
Clear Aperture: > 10/5 Scratch / Dig per MIL-O-1380A
chamfer:<0.1 mm @ 45°
clear Aperture: extend over the entire faces to the chamfered edges
Anti-Reflection Coating:
Single layer MgF2 coating with high damage threshold for high power laser operation. Reflectivity R < 0.25% @ 1064 nm per surface. Damage threshold over 750 MW/cm2@ 1064nm, 10 ns and 10 HZ.
High-Reflection Coating:
Standard HR coating with R>99.8% @ 1064nm and R<5% @ 808nm can be performed in WTS. Other HR coatings, such as HR @ 1064/532 nm, HR @ 946nm, HR 1319 nm and other wavelengths are also available.
Standard products in-stock:
The standard Nd: YAG laser rod with dimension of f3x5 mm and f4x50 mm with AR or HR- coating for Diode Pumped Solid State Lasers (DPSS) are ready for immediate delivery. For more information about standard Nd: YAG rods please refer to page 62 of Diode Pumped Laser Optics Kits.
Note:Higher grade or specific Nd: YAG rods or slabs are also available upon request.
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[Sell]
KTP crystal |
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Potassium Titanyl Phosphate (KTiOPO4 or KTP)
Advantages:
Large Nonlinear Optical (NLO) Coefficients
Wide Angular Bandwidth and Small Walk-off Angle
Broad Temperature and Spectral Bandwidth
High Electro-Optic (E-O) Coefficient and Low Dielectric Constant
Large Figure of Merit for an Optical Waveguide Modulator
Nonhygroscopic, Good Chemical and Mechanical Properties
Applications:
Frequency Doubling (SHG) of Nd-doped Lasers for Green/Red Output.
Frequency Mixing (SFM) of Nd Laser and Diode Laser for Blue Output.
Parametric Sources (OPG, OPA and OPO) for 0.6mm-4.5mm Tunable Output.
E-O Modulators, Optical Switches, Directional Couplers.
Optical Waveguides for Integrated NLO and E-O Devices.
DND Provides:
Standard size of KTP crystal for DPSS application;
Strict Quality Control;
2 - 3 Weeks Delivery;
Unbeatable Price and Special OEM Discount;
Free Technical Support;
AR-Coating, Mounting and Re-polishing Service;
Mass Production to Support Industrial and Commercial Applications;
New: Precision Oven εt Temperature Controller for Heating KTP.
Basic Properties
1. Structural and Physical Properties
Crystal Structure Orthorhombic, point group mm2
Cell Parameters a = 6.404Å, b = 10.616Å, c = 12.814Å Z = 8
Melting Point 1172 oC Incongruent
Curie point 936 oC
Mohs Hardness » 5.0
Density 3.01g/cm3
Linear Absorption Coefficients a <0.001 cm-1 @ l =1064 nm or 532 nm
Hygroscopic Susceptibility no
Relative Dielectric Constant eeff=13
Specific heat 0.1643 cal/g.oC
Electrical conductivity 3.5x10-8 s/cm (c-axis, 22oC, 1KHz)
Thermal Conductivity 13W/m/K
2. Linear Optical Properties
Transparency Range:
350 - 4500 nm, See Transparency Curve
KTP Transparency Curve
Refractive Indices:
Wavelength nx ny nz
1064 nm 1.7377 1.7453 1.8297
532 nm 1.7780 1.7886 1.8887
Therm-Optic Coefficients:
dnx/dT=1.1x10-5/oC
dny/dT=1.3x10-5/oC
dnz/dT=1.6x10-5/oC
Sellmeier Equations:
n2x=3.0065+0.03901/(l2-0.04251)-0.01327l2
n2y=3.0333+0.04154/(l2-0.04547)-0.01408l2
n2z=3.3134+0.05694/(l2-0.05658)-0.01682l2
3. NonLinear Optical Properties
Phase-Matchable Output Range: 492- 1700 nm
NLO Coefficients:
d31=2.54pm/V, d32=4.35pm/V, d33=16.9pm/V
d24=3.64pm/V, d15=1.91pm/V at 1064 nm
deff(II)» (d24 - d15)sin2fsin2q - (d15sin2f + d24cos2f)sinq
Electro-Optic Coefficients: Low Frequency (pm/V) High Frequency(pm/V)
g13 9.5 8.8
g23 15.7 13.8
g33 36.3 35.0
g51 7.3 6.99
g42 9.3 8.8
Applications for SHG and SFG of Nd: lasers
KTP is the most commonly used material for frequency doubling of Nd: YAG lasers and other Nd-doped lasers, particularly at the low or medium power density. The following Table lists the major NLO properties of KTP for frequency-doubling of Nd: YAG laser.
PM angle q=90o, f=23.5o,
where q & f are polar angles referring to Z and X.
Effective SHG coefficient deff » 8.3xd36(KDP)
Angular acceptance 20 mrad-cm
Temperature acceptance 25oC-cm
Spectral acceptance 5.6 Å-cm.
Walk-off angle 4.5mrad (0.26o)
Optical damage threshold > 450MW/cm2, (@ 1.06mm, 10ns, 10Hz)
To date, extra- and intra-cavity frequency doubled Nd: lasers using KTP have become a preferred green laser source for many R&D, medical, industrial and commercial applications. By using extracavity KTP SHG, over 80% conversion efficiency and 700mJ green laser were obtained with a 900 mJ jection-seeded Q-switched Nd: YAG laser.
Type II SHG in XY Plane Type II SHG in XZ Plane
Applied to diode-pumped Nd: laser, KTP is a basic NLO crystal for the construction of compact visible solid state laser systems. Recent advances in intracavity-doubled Nd: YVO4 and Nd: YAG lasers have increased the demand for compact green lasers used in display, construction, optical disk and laser printer. Over 200 mw TEM00 green outputs are available from LD pumped Nd: YVO4 and Nd: YAG lasers and 3 W TEM00, mode-locked green laser was generated by intracavity SHG in a 5 |
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[Sell]
Cr4+:YAG Crystal |
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Chromium Doped Yttrium Aluminum Garnet Cr4+:YAG Crystal
A High Power, Solid State and Compact Passive Q-switch
Passive Q-Switching is preferred for simplicity of manufacturing and operation, low cost and reduced system size and weight. Cr4+: YAG (Y3Al5O12) is an excellent crystal for passively Q-switching diode pumped or lamp-pumped Nd: YAG, Nd: YLF, Yb: YAG or other Nd and Yb doped lasers at wavelength from 1.0 to 1.2 mm. Because of its chemically stable, durable, UV resistant, good thermal conductivity and high damage threshold (> 500 MW/cm2) and being easy to be operated, it will replace traditional materials, such as, LiF, organic Dye and color centers.
Basic Properties of Cr4+:YAG
Formula Cr4+:Y3Al5O12
Crystal Structure Cubic Garnet
Dopant Level 0.5 mol% ~ 3 mol%
Hardness 8.5 (Mohs)
Damage Threshold > 500 MW/cm2
Refractive Index 1.82 @ 1064 nm
Main Specifications
Flatness < λ/8
Wavefront Distortion λl/4
Parallelism < 30”
Surface quality 20/10 scratch/dig
AR-coating R<0.2% @ 1064 nm
Standard Aperture 3X3 ~ 10X10 mm
AR-coatings and HR-coatings are also available. We can control the initial transmission (To) from 10% to 95% according to customer’s requirements. The preliminary experiments of WTS's Cr4+: YAG showed that the pulse width of passively Q-switched lasers could be as short as 9 ns for diode pumped Nd: YAG lasers and repetition as high as 10 kHz for diode pumped Nd: YVO4 lasers. Furthermore, an efficient green output at 532 nm, and UV output at 355 nm and 266 nm were generated, after a subsequent intracavity SHG in KTP for diode pumped and passive Q-switched Nd: YAG and Nd:YVO4 lasers.
Cr4+: YAG is also a laser crystal with tunable output from 1.35 mm to 1.6 mm. It can generate ultrashort pulse laser (to fs pulsed) when pumped by Nd: YAG laser at 1.064mm.
Note: When ordering Cr4+: YAG crystal, please specify the aperture, initial transmission (To) and coatings.
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