PHOTOP 2x4 QPSK Mixer–Polarization Diversified 90-deg Optical Hybrid MSHYD240

2x4 QPSK Mixer – Polarization Diversified Optical Hybrid

Optoplex's 2x4 polarization diversified optical hybrid (aka QPSK Mixer) mixes

an incoming signal with a local oscillator. The device features a monolithic optical

core integrating a PBS with an interferometer which is also widely used in Optoplex's

interleavers and DPSK-demodulators. This device is athermal, colorless, data-rate

independent and compact size.

The four outputs of this device can be coupled with
four single-ended detectors (see the function diagram below). This platform can also

be extended to a 2x8 polarization diversified hybrid to incorporate with 4 pairs of balanced detectors.

The QPSK mixer is a key building block in the ever-popular polarization- and phase-diversified

QPSK modulation scheme which is not only one of the leading contenders for the 100-Gb/s

systems but also a significant cost-effective alternative for the 40-Gb/s systems where 10-Gb/s

modulator and electronics can be used.