Polarization Dependent Balanced Detector

Item #                       INT-POL-1300
Optical Parameters
Wavelength Range   1270 - 1350 nm
Fiber Type Corning   SMF28
Optical Connectors   FC/APC
Extinction Ratio (PBS)   22 dB
Max. Input Power 1300nm   20 mW
Electrical Parameter
Detector Material/Type   InGaAs / PIN
Detector Wavelength Range   800 - 1700 nm
Typical Max. Responsivity   1.0 A/W
Output Bandwidth RF Output   DC - 15 MHz
Output Bandwidth Monitor Output   DC - 5 MHz
Transimpedance Gain   50 x 10³ V/A
Conversion Gain Monitor Outputs   5 V/mW
Saturation Power     100 µW @ 1300 nm
Electrical Output /Impedance      SMA, 50 Ω
DC Offset        ±10 mV
Power Supply        ±12 V, 200 mA
All accuracy data is valid at 23 ± 5 °C and 45% Humidity

Features
Compact Design
Integrated Signal Detection with Active Aliasing Filter
Fast Monitor Outputs for External Polarization Adjustment
Excellent Common Mode Rejection
Matched Lengths of S and P Paths

The INT-POL-1300 is an integrated pair of balanced detectors that are used to analyze the S and P States of Polarization (SOP) of two input signals independently. This compact system is designed for polarization sensitive optical coherence tomographyy (OCT) applications, but it can be used in any application where the difference between two signals has to be analyzed with high sensitivity.

Functionality of Balanced Receivers
The S and P polarization states of the input are split using a polarization beamsplitters (PBS). The split inputs are directed into two balanced detectors, one for each SOP. These balanced photodetectors operate in the same manner as our PDB100 Series of OCT Balanced Detectors, they subtract the two optical input signals from each other resulting in the cancellation of common mode noise. This allows small changes on the signal path to be extracted from the interfering noise floor for each SOP.