Si free-space balanced photodetector
Koheron PDX10B-SI is a Si free-space balanced photodetector with 80 kV/A transimpedance gain and 8 MHz bandwidth. With a noise-equivalent power spectral density of only 1 pW/√Hz at 800 nm and the capability to reject laser common mode noise, the photodetector can be shot-noise limited even at a low input signal level. A monitoring input signal is provided for each photodiode to assist with beam alignment and power balancing.
| Quantity | Price |
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Resources
Specifications
| PDX10B-80-DC-SI | PDX10B-3-DC-SI | |
|---|---|---|
| Detector | ||
| Detector type | Si PIN photodiode | Si PIN photodiode |
| Active diameter | 800 µm | 800 µm |
| Wavelength range | 320 nm to 1000 nm | 320 nm to 1000 nm |
| Optical input power | 0 mW to 3 mW | 0 mW to 3 mW |
| Photodiode peak responsivity (800 nm) | 0.55 A/W | 0.55 A/W |
| Transimpedance amplifier | ||
| Small signal bandwidth | 0 Hz to 8 MHz at 3 dB | 0 Hz to 50 MHz at 3 dB |
| Coupling | DC | DC |
| Transimpedance gain | 80 kV/A | 3 kV/A |
| Noise Equivalent Power | 1.4 pW/√Hz (at 1 MHz) | 6 pW/√Hz (at 1 MHz) |
| Output voltage range (high impedance) | -8.0 V to 8.0 V | -8.0 V to 8.0 V |
| Output voltage range (50 Ω) | -3.8 V to 3.8 V | -3.8 V to 3.8 V |
| Output impedance | 50 Ω | 50 Ω |
| Output | SMA female connector | SMA female connector |
| Monitoring (MON+ / MON-) | ||
| Gain | 1 V/mA | 1 V/mA |
| Bandwidth | 4 kHz | 4 kHz |
| Output impedance | 1 kΩ | 1 kΩ |
| Power supplies | ||
| Positive supply voltage | 5.5 V to 9 V (nominal 6 V) | 5.5 V to 9 V (nominal 6 V) |
| Negative supply voltage | -9 V to -5.5 V (nominal -6 V) | -9 V to -5.5 V (nominal -6 V) |
| Quiescent current | 35 mA per rail | 35 mA per rail |
| Maximum current | 100 mA per rail | 100 mA per rail |
| Other | ||
| Outside dimensions | 49 mm x 40 mm x 18 mm | 49 mm x 40 mm x 18 mm |
| Operating temperature | 0 °C to 50 °C | 0 °C to 50 °C |
| Weight | 29 g | 29 g |
Functional diagram
Characterization
Output power spectral density
The power spectral density of the PDX10B-80-DC-SI free-space balanced photodetector output was measured for different incident optical powers. Optical source is a pair of 810 nm LEDs driven by a Koheron DRV110-A-375 laser driver. Power spectrum is measured using the Koheron ALPHA250 FFT analyzer.
Small signal frequency response
Noise equivalent power
The figure below shows the noise-equivalent power spectral density at a wavelength of 810 nm.
Export information
| HS code | 8541.40.90 |
| Country of Origin | France |
