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Free-space logarithmic photodetector
Koheron PDX10R is a logarithmic photodetector for free-space optical power measurements.
In addition to two analog outputs log(A) and log(B), it provides the log-ratio log(A/B) with an adjustable offset and two gain settings (x1 and x10). The PDX10R provides a fully-analog solution for direct absorption measurement in spectroscopy setups.
For fiber-coupled photodiodes, see Koheron PD10R logarithmic photodetector.
| Quantity | Price |
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Resources
Specifications
| PDX10R-D-SI | |
|---|---|
| Detector | |
| Detector type | Dual Si PIN photodiodes |
| Active diameter | 800 µm |
| Wavelength range | 320 nm to 1000 nm |
| Optical input power | 500 pW to 4 mW |
| Photodiode peak responsivity(800 nm) | 0.55 A/W |
| Logarithmic amplifier | |
| Small signal bandwidth(at 3 dB, input power > 5 µW at 800 nm) | 600 kHz |
| Logarithmic slope | 300 mV/decade |
| Intercept photocurrent | 100 pA |
| Output impedance | 1 kΩ |
| Power supplies | |
| Supply voltage | 3.3 V to 13 V |
| Quiescent current | 11 mA |
| Maximum current | 40 mA |
| Other | |
| Outside dimensions | 49 mm x 40 mm x 16 mm |
| Operating temperature | 0 °C to 50 °C |
| Weight | 22 g |
More Photodetectors
Characterization
Frequency response
The figure below shows the frequency response of the detector with Si photodiodes for several input optical powers.
