
Expand your signal detection capabilities! COH 90° optical hybrids enable to extract phase, amplitude and polarization
for coherent detection by performing interferences between a signal and a local oscillator.
Several versions are available, depending on the input polarization states, the number of polarizations under use, and the adjustability available of the phase tuning.
For example COH180 is available for polarization-diverse heterodyne detection.

Features
Benefits
Uniformly balanced coherent detection with a high level of signal integrity
Perfect trade-off between performance, noise unsensitivity, real-time measurement and simplicity of implementation
High level of customization (phase tunability option, any input polarization, wide range of possible interface fibers…)
Applications
Quantum communication (CV-QKD)
Space optical communications (Flying model version available)
Distributed Acoustic Sensing (DAS)
QAM demodulation
The 90° Optical Hybrid (COH product line) is a compact free-space optical system for phase & amplitude extraction from a single polarization. Its compact design and customization abilities makes it very simple to integrate in every optical system.
Exail's COH090 is a 90° optical hybrid that enables to extract phase and amplitude from a signal by performing four 90° phase stepped interferences between the signal and a Local Oscillator (LO). This product is purely passive and athermal. The COH090 also features a phase tunability option to perfectly adjust the 90° of the hybrids depending on the wavelength used. Exail also offers a single or dual polarization 180° hybrid named COH180. Single or Dual Polarization models available
A space-qualified TRL9 technology
COH 90° Optical Hybrid are manufactured following an in-house process of ultra-accurate assembling of micro-optics. The full process, from active optical alignment to gluing and assembling process, is based on technologies that have proved their abilities to respect constraints of space deployment.
Due to the increasing demand for space products, a new hermetic seam-sealing system was acquired in 2022 to carry out mass production of its components, sealed in a controlled atmosphere, at atmospheric pressure.
Now, on demand, Exail can provide space-qualified COH 90° Optical Hybrids.