100 MHz balanced photodetector

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PD100B - Balanced amplified photodetector

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 €

PD100B-AC

Quantity	Price

Coupling:

Resources

Specifications

	PD100B-AC	PD100B-DC
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 V_DC	6 - 15 V_DC
Power supply (negative)	-15 to -6 V_DC	-15 to -6 V_DC
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^1/2 (at 10 MHz)	8 pW / Hz^1/2 (at 10 MHz)
DC cutoff frequency (3 dB)	160 Hz	N.A.
Output impedance	50 Ω	50 Ω
Dimensions	64 mm x 38 mm x 13 mm	64 mm x 38 mm x 13 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

Characterization

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