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DET08CFC(/M)

Chapter 10: Thorlabs Worldwide Contacts

TTN020103-D02 Page

18

Chapter 10

Thorlabs Worldwide Contacts

USA, Canada, and South America

Thorlabs, Inc.
56 Sparta Avenue
Newton, NJ 07860
USA
Tel: 973-300-3000
Fax: 973-300-3600
www.thorlabs.com
www.thorlabs.us (West Coast)
Email: [email protected]
Support: [email protected]

UK and Ireland

Thorlabs Ltd.
1 Saint Thomas Place, Ely
Cambridgeshire CB7 4EX
Great Britain
Tel: +44 (0)1353-654440
Fax: +44 (0)1353-654444
www.thorlabs.com

Email: [email protected]
Support: [email protected]

Europe

Thorlabs GmbH
Hans-Böckler-Str. 6
85221 Dachau
Germany
Tel: +49-(0)8131-5956-0
Fax: +49-(0)8131-5956-99
www.thorlabs.de
Email: [email protected]

Scandinavia

Thorlabs Sweden AB
Mölndalsvägen 3
412 63 Göteborg
Sweden
Tel: +46-31-733-30-00
Fax: +46-31-703-40-45
www.thorlabs.com
Email: [email protected]

France

Thorlabs SAS
109, rue des Côtes
78600 Maisons-Laffitte
France
Tel: +33 (0) 970 444 844
Fax: +33 (0) 825 744 800
www.thorlabs.com
Email: [email protected]

Brazil

Thorlabs Vendas de Fotônicos Ltda.
Rua Riachuelo, 171
São Carlos, SP 13560-110
Brazil
Tel: +55-16-3413 7062
Fax: +55-16-3413 7064
www.thorlabs.com
Email: [email protected]

Japan

Thorlabs Japan, Inc.
Higashi-Ikebukuro Q Building 1F
2-23-2, Higashi-Ikebukuro,
Toshima-ku, Tokyo 170-0013
Japan
Tel: +81-3-5979-8889
Fax: +81-3-5979-7285
www.thorlabs.jp
Email: [email protected]

China

Thorlabs China
Room A101, No. 100
Lane 2891, South Qilianshan Road
Putuo District
Shanghai
China
Tel: +86 (0) 21-60561122
Fax: +86 (0)21-32513480
www.thorlabschina.cn
Email: [email protected]

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Содержание 24-00245-02

Страница 1: ...DET08CFC M Fiber Input InGaAs Biased Detector User Guide ...

Страница 2: ...4 4 Dark Current 6 4 5 Junction Capacitance 7 4 6 Bandwidth and Response 7 4 7 Terminating Resistance 8 4 8 Shunt Resistance 8 4 9 Series Resistance 8 4 10 Damage Threshold 8 4 11 Battery Replacement 9 Chapter 5 Common Operating Circuits 10 Chapter 6 Specifications 12 6 1 Response Curve 13 6 2 Typical Response 13 6 3 Mechanical Drawing 14 Chapter 7 Troubleshooting 15 Chapter 8 Certificate of Confo...

Страница 3: ...ion Direct Current Alternating Current Both Direct and Alternating Current Earth Ground Terminal Protective Conductor Terminal Frame or Chassis Terminal Equipotentiality On Supply Off Supply In Position of a Bi Stable Push Control Out Position of a Bi Stable Push Control Caution Risk of Electric Shock Caution Hot Surface Caution Risk of Danger Warning Laser Radiation Caution Spinning Blades May Ca...

Страница 4: ...PC bulkhead connector detector and 12 V bias battery enclosed in a compact aluminum housing The FC PC connector provides easy coupling to fiber based light sources The output uses an SMA jack to minimize size and maximize frequency response The maximum bandwidth is 5 GHz and will operate over the spectral range of 800 1700 nm A visible version the DET025AFC M is also available for operation in the...

Страница 5: ...om and side of the housing and mount into a PH series post holder 2 Attach a 50 Ω SMA to Coax cable i e CA28xx to the output of the detector Select and provide a terminating resistor to the remaining end of the cable See Chapter 4 page 5 to determine resistor values Thorlabs sells a 50 Ω terminator T4119 for best frequency performance and a variable terminator VT1 for output voltage flexibility No...

Страница 6: ... light Depicted in Figure 1 is a junction photodiode model with basic discrete components to help visualize the main characteristics and gain a better understanding of the operation of Thorlabs photodiodes Figure 1 Photodiode Model 4 2 Responsivity The definition of photodiode responsivity is the ratio of generated photocurrent IPD to the incident light power P at a given wavelength 4 3 Modes of O...

Страница 7: ...of the device is restricted causing a build up of voltage This mode of operation exploits the photovoltaic effect which is the basis for solar cells When operating in photovoltaic mode the amount of dark current is at a minimum setting 4 4 Dark Current When a bias voltage is applied to a photodiode a leakage current called dark current is produced Photoconductive mode tends to generate a higher da...

Страница 8: ...e s bandwidth and response It reaffirms that larger diode areas encompass a greater junction volume with increased charge capacity In a reverse bias application the depletion width of the junction increases thus effectively reducing the junction capacitance and increasing the response speed 4 6 Bandwidth and Response A load resistor will react with the photodetector junction capacitance to limit t...

Страница 9: ... on the photodiode material For example and InGaAs detector has a shunt resistance on the order of 10 MΩ while a Ge detector is in the kΩ range This can significantly affect the noise current on the photodiode For most applications however the high resistance produces little effect and can be ignored 4 9 Series Resistance Series resistance models the resistance of the semiconductor material This r...

Страница 10: ...5 mW light source at peak wavelength When no light is applied the supply current is very small and the battery hardly degrades Locate the battery cap directly above the output BNC Unthread the cap and remove the battery Install the new battery into the cap negative side in and thread the cap back into the detector Be careful not to cross thread the cap into the housing This detector does not inclu...

Страница 11: ...based upon the incident light and its wavelength and can be viewed on an oscilloscope by attaching a load resistance on the output of the detector The RC Filter removes all high frequency noise from the input supply which otherwise may contribute to a noisy output Figure 3 Amplified Detector On Off Switch Protection Diode Photodetector VBAT RC Filter External Resistor 1 kΩ Capacitor 0 1 µF V Bias ...

Страница 12: ...todiode holding point A at the same potential as point B by the operational amplifier This eliminates the possibility of dark current Photoconductive Mode The photodiode is reverse biased improving the bandwidth while lowering the junction capacitance The gain of the detector is dependent on the feedback element RF The bandwidth of the detector can be calculated using the following equation 3 4 Wh...

Страница 13: ...V After Pulse Ringing 20 of Maximum Bias Voltage VR 12 V Dark Current b ID 1 5 nA Output Voltage VOUT 0 to 1 V 50 Ω c General Input FC PC Fiber Connector Output SMA DC Coupled Package Size 2 21 x 1 40 x 0 80 56 1 mm x 35 6 mm x 20 3 mm Ball Lens Diameter 0 059 1 50 mm Ball Lens Clear Aperture 0 8 mm Weight 0 18 kg Storage Temp 0 to 40 C Operating Temp 0 to 40 C Battery A23 12 VDC 40 mAh Replacemen...

Страница 14: ...DET08CFC M Page 13 Rev B April 29 2015 6 1 Response Curve 6 2 Typical Response Figure 4 Tr 55 ps Tf 52 ps 20 80 Tp 110 ps ...

Страница 15: ...0 35 6 mm 0 95 24 1 mm 2 23 56 6 mm 0 80 20 3 mm 0 95 25 1 mm 0 40 10 2 mm 0 35 8 9 mm 0 40 10 2 mm 0 40 10 2 mm 1 50 38 1 mm 0 40 10 2 mm Mounting Hole 8 32 M4 x 0 25 SMA Female Output Connector Battery Tube Use Only A23 12 V Batteries FC PC Fiber Input Connector InGaAs Photodetector ...

Страница 16: ...light and verify that a 60 Hz 50 Hz outside the US signal appears on the scope If so the device should be operating properly and the problem may be with the light source or alignment There is an AC signal present when the unit is turned off The detector has an AC path to ground even with the switch in the OFF position It is normal to see an output response to an AC signal with the switch in this s...

Страница 17: ...DET08CFC M Chapter 8 Certificate of Conformance TTN020103 D02 Page 16 Chapter 8 Certificate of Conformance ...

Страница 18: ...uch as Pure OEM products that means assemblies to be built into a unit by the user e g OEM laser driver cards Components Mechanics and optics Left over parts of units disassembled by the user PCB s housings etc If you wish to return a Thorlabs unit for waste recovery please contact Thorlabs or your nearest dealer for further information 9 1 Waste Treatment is Your Own Responsibility If you do not ...

Страница 19: ...abs com Scandinavia Thorlabs Sweden AB Mölndalsvägen 3 412 63 Göteborg Sweden Tel 46 31 733 30 00 Fax 46 31 703 40 45 www thorlabs com Email scandinavia thorlabs com France Thorlabs SAS 109 rue des Côtes 78600 Maisons Laffitte France Tel 33 0 970 444 844 Fax 33 0 825 744 800 www thorlabs com Email sales fr thorlabs com Brazil Thorlabs Vendas de Fotônicos Ltda Rua Riachuelo 171 São Carlos SP 13560 ...

Страница 20: ...www thorlabs com ...

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