QPSK Hybrid, Kylia COH24 Series, 90 Deg. Optical Hybrid
To be used for optical coherent detection, including QPSK receiver, Kylia’s six-port 90° Optical Hybrid mixes the incoming signal with the reference signal to generate four quadratural states in the complex-field space. The optical hybrid then delivers the four light signals to two pairs of balanced detectors.
The COH24 is a single polarization 90° optical hybrid that enables to extract phase and amplitude from a single polarization signal by performing four 90° phase stepped interferences between the signal and a Local Oscillator (LO). The COH24-X is a new generation optical hybrid with improved performances (among other things, a wider operating wavelength range and much better dual uniformities).
These products are purely passive and athermal.
The COH24-X also features a phase tunability option in order to perfectly adjust the 90° of the hybrid depending on the wavelength used. Kylia also offers a dual polarization 180° hybrid named COH22.
Key Features and Benefits
- Purely passive (no need for external electric power)
- Compact size
- Based on free-space bulk-optics design
- Polarization diversified version also available
- Key component for the optical coherent detection
- QPSK demodulation