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Si free-space balanced photodetector

PRODUCTS > PHOTONICS > PHOTODETECTORS > SI FREE-SPACE BALANCED PHOTODETECTOR
PDX10B-SI - Si free-space balanced photodetector
PDX10B-SI - Si free-space balanced photodetector PDX10B-SI - Frequency response PDX10B-SI - Shot noise PDX10B-SI - Noise Equivalent Power

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.

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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

More Photodetectors

Functional diagram

PDX10B-80-DC-SI free-space Si balanced photodetector 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.

PDX10B Output power spectral density 80 kV/A version
PDX10B-80-DC-SI output power spectral density
PDX10B Output power spectral density 3 kV/A version
PDX10B-3-DC-SI output power spectral density

Small signal frequency response

PDC10B-80-DC-SI photodetector frequency response
PDC10B-80-DC-SI frequency response
PDX10B-3-DC-SI photodetector frequency response
PDX10B-3-DC-SI frequency response

Noise equivalent power

The figure below shows the noise-equivalent power spectral density at a wavelength of 810 nm.

PDX10B-80-DC-SI photodetector noise equivalent power
PDX10B-80-DC-SI noise equivalent power
PDX10B-3-DC-SI photodetector noise equivalent power
PDX10B-3-DC-SI noise equivalent power

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Export information

HS code 8541.40.90
Country of Origin France

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PDX10B-SI
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