100 MHz balanced photodetector

PD100B - Balanced amplified photodetector
PD100B - Balanced amplified photodetector PD100B - Diagram PD100B - Frequency response PD100B - Shot noise PD100B - Noise Equivalent Power PD100B - Common mode rejection ratio

Koheron PD100B is an InGaAs amplified balanced detector with 39 kV/A gain, 100 MHz bandwidth and a common mode rejection ratio of 35 dB. Available in AC and DC coupled versions, the PD100B is ideal for applications such as Optical Coherence Tomography and Lidar sensing.

295 €


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Wavelength range 900 - 1700 nm 900 - 1700 nm
Small signal bandwidth 160 Hz - 100 MHz at 3 dB 0 - 100 MHz at 3 dB
Coupling AC DC
Power supply (positive) 6 - 15 VDC 6 - 15 VDC
Power supply (negative) -15 to -6 VDC -15 to -6 VDC
Optical input power 0 - 1.5 mW 0 - 1.5 mW
Transimpedance gain 39 kV / A 39 kV / A
Output voltage range ±3 V ±3 V
CMRR at 1 MHz 35 dB 35 dB
Noise Equivalent Power 8 pW / √Hz (at 10 MHz) 8 pW / √Hz (at 10 MHz)
DC cutoff frequency (3 dB) 160 Hz N.A.
Output impedance 50 Ω 50 Ω
Outside Dimensions 63 mm x 38 mm x 14 mm 63 mm x 38 mm x 14 mm
Photodiode connector FC FC
Photodiode active diameter 300 µm 300 µm
Outputs SMA SMA
Mechanical details Compatible with M6 metric breadboards (25 mm spacing) Compatible with M6 metric breadboards (25 mm spacing)

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Functional diagram

PD100B balanced photodetector functional diagram


Output power spectral density

The power spectral density of the PD100B output was measured for different incident optical powers. The indicated power is the incident power per photodiode. The PD100B output is directly connected to the spectrum analyzer (Tektronix RSA306). Optical source is a Koheron LD100 laser at 1550 nm.

PD100B-DC photodetector power spectral density

DC-coupled PD100B output power density

PD100B-AC photodetector power spectral density

AC-coupled PD100B output power density

Common mode rejection ratio

When properly balanced, the common mode rejection ratio (CMRR) at 1 MHz of the PD100B is 35 dB. To maximize the CMRR care should be taken not only to balance the optical powers, but also the path length between the two channels.

Common mode rejection ratio

Frequency response

PD100B Frequency response

Noise equivalent power

Noise Equivalent Power

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Revision history

  • 2: PCB form factor update.

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