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FDPS3X3

Lead Sulfide Photoconductor

User Guide

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Содержание FDPS3X3

Страница 1: ...FDPS3X3 Lead Sulfide Photoconductor User Guide ...

Страница 2: ...o Noise Ratio 5 3 6 Noise Equivalent Power 5 3 7 Dark Resistance 6 3 8 Detectivity D and D 6 3 9 Typical Amplifier Circuit 6 Chapter 4 Specifications 8 4 1 Response Curve 9 4 2 SNR vs Chopping Frequency 9 4 3 SNR vs Supply Voltage 10 4 4 Dark Resistance vs Temperature 10 4 5 Temperature vs Sensitivity 11 Chapter 5 Mechanical Drawing 12 Chapter 6 Regulatory 13 6 1 Waste Treatment is Your Own Respon...

Страница 3: ...ect 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 Cause Har...

Страница 4: ...cal resistance of the photoconductive material is reduced when illuminated with light PbS and PbSe detectors can be used at room temperature However temperature changes affect dark resistance sensitivity and response speeds see Temperature Considerations below Incident light causes the number of charge carriers in the active area to increase thus decreasing the resistance of the detector This chan...

Страница 5: ... 0 12 3 4 3 3 Effects of Chopping Frequency The photoconductor signal will remain constant up to the time constant response limit PbS and PbSe detectors have a typical 1 f noise spectrum i e the noise decreases as chopping frequency increases which has a profound impact on the time constant at lower frequencies The detector will exhibit lower responsivity at lower chopping frequencies Frequency re...

Страница 6: ...5 Signal to Noise Ratio Since the detector noise is inversely proportional to the chopping frequency the noise will be greater at low frequencies The detector output signal is linear to increased bias voltage but the noise shows little dependence on the bias at low levels When a set bias voltage is reached the detector noise will increase linearly with applied voltage At high voltage levels noise ...

Страница 7: ...erformance of the photodetector B 678 Where A is the area of the photosensitive region of the detector f is the effective noise bandwidth and NEP is the noise equivalent power 3 9 Typical Amplifier Circuit Due to the noise characteristic of a photoconductor it is generally suited for AC coupled operation The DC noise present with the applied bias will be too great at high bias levels thus limiting...

Страница 8: ...4 is a SNR vs Supply Voltage characteristic curve to help determine best operating condition The output voltage is derived as the following CDE F1 G H 9 Figure 2 Amplifier Model B A Out Feedback Resistor Rf V Detector RD R filter C filter RLOAD Ri IS RC Filter Optical Chopper ...

Страница 9: ...p 2200 nm Typ Peak Sensitivity1 ℜ λ 2 x 104 V W Min 5 x 104 V W Typ Rise Time2 0 to 63 200 µs Detectivity3 λP 600 1 D 1 x 1011 J LM N Typ Dark Resistance RD 0 25 to 2 5 MΩ Bias Voltage VB 100 V General Package TO 5 Operating Temperature 30 to 65 C Storage Temperature 55 to 65 C 1 Measured at chopping frequency of 600 Hz Bias Voltage of 15 V RD RL 2 Rise Time is measured from 0 to 63 of final value...

Страница 10: ...g Frequency 0 10 000 20 000 30 000 40 000 50 000 1 1 25 1 5 1 75 2 2 25 2 5 2 75 3 Photo Sensitivity V W Wavelength μm PbS Photoconductor Responsivity 0 1 1 10 10 100 1000 Relative S N Chopping Frequency SNR vs Chopping Frequency Supply Voltage 15 V Rise Time 200 μs S N Signal Noise ...

Страница 11: ...emperature 0 1 2 3 4 5 6 7 8 0 100 200 300 400 500 600 700 800 0 10 20 30 40 50 60 Noise µV Signal µV Supply Voltage V SNR vs Supply Voltage Chopping Frequency 600Hz Bandwidth 60Hz Signal Noise 0 0 5 1 1 5 2 2 5 10 0 10 20 30 40 50 60 Relative Value Temperature C Dark Resistance vs Temperature ...

Страница 12: ...tector Page 11 Rev B September 8th 2014 4 5 Temperature vs Sensitivity 0 1 1 10 10 0 10 20 30 40 50 60 Relative Sensitivity Temperature C Temperature vs Sensitivity Chopping Frequency 600Hz Supply Voltage 15V ...

Страница 13: ...0 D02 Page 12 Chapter 5 Mechanical Drawing Visit the web for a more detailed mechanical drawing 3 0 mm 0 12 Ø 5 9 mm 0 23 Ø 8 1 mm 0 32 Ø 9 1 mm 0 36 Ø 9 1 mm 0 36 4 2 mm 0 17 Ground Detector Area Detector Pin Detector Pin 3 0 mm 0 12 ...

Страница 14: ...s such 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 6 1 Waste Treatment is Your Own Responsibility If you do n...

Страница 15: ...merica Thorlabs Inc sales thorlabs com techsupport thorlabs com Europe Thorlabs GmbH europe thorlabs com France Thorlabs SAS sales fr thorlabs com Japan Thorlabs Japan Inc sales thorlabs jp UK and Ireland Thorlabs Ltd sales uk thorlabs com techsupport uk thorlabs com Scandinavia Thorlabs Sweden AB scandinavia thorlabs com Brazil Thorlabs Vendas de Fotônicos Ltda brasil thorlabs com China Thorlabs ...

Страница 16: ...www thorlabs com ...

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