Polarization Diverse Balanced Photodetector
OCT and sensor systems require high performance balanced photodetectors to increase system signal to noise ratio. Polarization sensitive OCT and similar applications require separate analysis of the two polarization components of a signal. The PBPD-001 is specially designed for use in such systems. The device is fully enclosed in a compact, sturdy aluminum box with two optical input ports, a balanced RF output port and two monitor ports for each polarization component, and a power supply port. With a bandwidth up to 200 MHz, a transimpedance gain larger than 30K and a saturation power larger than 130 µW, the PBPD-001 is ideal for integration into laboratory or commercial OCT, fiber sensor, and high performance optical measurement systems with polarization dependent detection requirements.
Applications:
. Polarization sensitive OCT
· Fiber optic distributed sensing
· Polarization resolved sensing
· Instrumentation
. R&D
Unique Features:
· Low Noise
· Excellent CMRR
· High conversion gain
· Wide bandwidth
. Compact
Preliminary Specifications:
Operating Wavelength
1310 ± 50nm standard (1550 ± 50nm optional)
Polarization Crosstalk
< 25 dB (splitting element)
PDL (before polarization splitting )1
< 0.25 dB
Return Loss
> 50 dB
Input Power Damage Threshold
20 mW
Transimpedance Gain
3 × 104 V/A
Signal Conversion Gain
> 30 V/mW (interference signal)
RF Bandwidth
DC to 210 MHz
RF Output Impedance
50 Ω
RF Output Voltage Range
± 1.75 V @ 50Ω load
± 3.5 V @ high impedance load
RF Output DC Offset
< ±5 mV
CW Balanced Saturation Power (at input)
>150 µW
NEP
< 11 pW / √Hz
Overall Output Voltage Noise
< 5 mV RMS
Overall Common Mode Rejection Ratio
> 25 dB
Monitor Bandwidth
DC to 1MHz
Monitor Output Impedance
200 Ω
Monitor Conversion Gain
2 V/mW
Max. Monitor Voltage2
4 V
Power Supply
±12 V DC / 200 mA
Signal Output Connector
SMA
Input Optical Fiber
SMF - 28 standard (PMF optional)
Input Pigtail Length
> 0.75m
Operating Temperature
10 to 50 °C
Storage Temperature
40 to 85 °C
Dimensions
100mm x 80mm x 27mm
Notes: Specs in table apply for the standard configuration at 23 ± 5 °C.
1.At center wavelength.
2.Linear range