DescriptionSpecifications
Models
Catalog PDF
PbS and PbSe Detectors
Fig. 1 NEP of PbS and PbSe Detectors.
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Which Detector Do I Choose? |
Use the 3 x 3 mm room temperature detectors when signals are strong. Use the 1 x 3 mm, TE cooled detectors when signals are weak and you want to optimize your S/N, especially when using monochromators (the 1 x 3 mm aspect ratio is better matched to a monochromator slit shape).
You can use these detectors to monitor DC signals by periodically chopping the input beam. The signal can then be displayed on an oscilloscope, displayed on an RMS meter, such as our OPM, or used as an input to a lock-in amplifier. The gain of the built-in amplifier can be matched to the display electronics. A higher gain is needed to bring the signal to the mV levels needed for oscilloscope display. The lowest gain is suitable for matching the noise voltage to the resolution capability of a narrow band lock-in amplifier. |
Voltages and Controls |
These detectors operate in a photoconductive mode. As such, they require ~100 V bias for proper operation. A bias power supply is built into the detector and all that is required is ±15 V for the amplifier and +5 V for the bias power supply. The 70703/70709 Power Supply will serve to provide the necessary voltages. Cooled units require the 77055 Temperature Controller to power and stabilize them. |
Mounting and Cables |
These mounted detectors have a 1.5 Inch Series female flange. All the necessary interconnecting cables are shipped with the detectors. |
Tech Note |
The noise level of these detectors can be significantly increased by exposure to UV or blue light. They usually recover in the dark, but this can take many hours. Protect them from unnecessary exposure. |
Specifications
| Voltage Gain | 2x, 10x or 50x selectable |
| Amplifier Bandwidth | 10 Hz to 10 kHz (3 dB) |
| Connectors | 9 pin D-sub male (power in and signal out) BNC (signal out) 4 pin LEMO (TE cooler controller) |
| Power Requirements | ±15 Vdc, ≤20 mA + 5 Vdc, ≤65 mA |
| | Model | Description |
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70200
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Lead Sulfide Detector, 3x3mm, 400µs Response, 105 V/W, 5pW NEP
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70201
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Cooled Lead Sulfide Detector,1x3mm,400µs Resp,3x105V/W,1.5pW NEP
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70202
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Lead Selenide Detector, 3x3mm, 3µs Response, 3000 V/W, 60pW NEP
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70203
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TE Cooled Lead Selenide Detector, 1x3mm, 10µs Response, 8000 V/W, 15pW NEP
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70703
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Laboratory Power Supply, +/- 15 VDC, 115 VAC
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70709
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Laboratory Power Supply, +/- 15 VDC, 230 VAC
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77055
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TE Cooler Controller
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