2x4 QPSK Mixer

Optoplex's 2X4 polarisation diversified optical hybrid (aka QPSK Mixer) is a 2x4 device, which mixes an incoming signal with a local oscillator. The 4 outputs of this device are connected to 4 single-ended detectors (see the function diagram below). The device features a monolithic optical core integrating a PBS with an interferometer which is also widely used in Optoplex's interleaver and DPSK-demodulator platforms. This device is athermal, colourless, data-rate independent, compact in size and designed for manufacturability. This platform can also be extended to a 2X8 polarisation diversified hybrid to incorporate with 4 pairs of balanced detectors.

Key Features

• Purely passive device (no need for external electric power)
• Compact size
• Based on free-space bulk-optics design

Primary Applications

• For the next-generation optical transmission system

Key component for the optical coherent detection (a detection format which has been widely used in many other communication methods, such as radio and wireless)