Optoplex's 2X4 polarization 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, colorless, data-rate independent, compact in size and designed for manufacturability. 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 of 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 awesome alternative for the 40-Gb/s systems with the potential of utilizing 10-Gb/s modulator and electronics.

For 90° Optical Hybrid, please visit Optical Hybrid page.

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

• 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)

Notes:
1. Over the stated spectral and operating temperature ranges and all polarization states.
2. Not including six collimator sleeves extending from one longer side by ~18 mm.