The balanced photoreceiver set BPRV2125AM consists of two pieces BPRV2125A with matched fiber lengths. The balanced photoreceiver module BPRV2125A is a customized differential front-end for 43 Gbit/s DPSK-applications featuring high differential gain of typically 2800 V/W. The photoreceivers each contain two waveguide-integrated pin-photodiodes (PD) on a single chip and a limiting amplifier (LA) within one small form factor SMD-package. The limiting amplifier provides a differential output voltage swing of typ.
600 mV. The receivers are therefore well suited for OC-768/STM-256 system operation up to 43 Gbit/s but especially designed for DQPSK applications.

The DC output voltage can be monitored for OUTN and OUTP independently. For each amplifier path a threshold control at a linear amplification stage should be applied to ensure an optimized differential output signal.

 An excellent electrical and optical phase propagation is achieved by a total skew of lower than 5 ps between the balanced signal paths of each device and 10 ps total skew for all fibers of the pair.