Fiber Interferometer
The FCOH is a passive, micro-optics-based 90° optical hybrid designed for coherent optical signal demodulation, including BPSK and QPSK formats. It functions by mixing the incoming signal (S) with a local oscillator reference signal (L), generating four optical outputs corresponding to the vector sums and differences of the two inputs: S+L, S−L, S+jL, and S−jL. These outputs represent four quadrature states in the complex optical field space. The signals are then directed to two pairs of balanced photodetectors, enabling differential detection of the in-phase (I) and quadrature (Q) components. This configuration allows the extraction of both amplitude and relative phase information through digital signal processing.
Configuration options
Configure the options below and add your exact build to the enquiry — we confirm the part number and availability.
We confirm the exact part number for your configuration on enquiry.
Type: Regular · Wavelength: 1260~1620 · Version: Standard · Fiber Cover: 900 um tube · Fiber Length: 0.25m · Connector: None
Application context
Application guidance is tied to the configured wavelength, fiber interface and optical-budget fields for this family.
Fiber Coupled 90° Optical Hybrid: Laboratory optical integration depends on preserving the optical budget through the complete path. The 1260~1620 wavelength specification sets source and detector compatibility. The fiber/interface entry (900 um tube) must match the connected components.
Fiber Coupled 90° Optical Hybrid: Fiber-optic instrumentation depends on preserving the optical budget through the complete path. The 1260~1620 wavelength specification sets source and detector compatibility. The fiber/interface entry (900 um tube) must match the connected components.
System integration
Use these checks to connect Fiber Coupled 90° Optical Hybrid to the surrounding optical, mechanical and control system. Every value shown is taken from this model's own specification record.
Technical FAQ
Fiber Cover: 900 um tube · Fiber Length: 0.25m, 0.5m. Specify connector polish and fiber architecture together. FC/PC, FC/APC and SMA interfaces, and single-mode, multimode and polarization-maintaining fibers, impose different return-loss, mode-field and alignment requirements.
Wavelength: 1260~1620. Check the Fiber Interferometer passband, insertion loss, return loss and power handling at the actual source wavelength; a nominal telecom-band label is not a substitute for the configured range.
Share your wavelength, fiber type, connector, power handling and control requirements and we will qualify the matching configuration and part number.
Model selection
Compare Fiber Coupled 90° Optical Hybrid with the closest available models in the Fiber Interferometer family. Confirm option-dependent values on the final configuration before ordering.
| Selection parameter | Fiber Coupled 90° Optical Hybrid (current) | Scanning Fiber Mach-Zehnder Interferometer | Scanning Fiber Michelson Interferometer |
|---|---|---|---|
| Wavelength range | 1260~1620 | 488, 532, 650, 780, 850, 980, 1060, 1310, 1550, 2000 | 488, 532, 650, 780, 850, 980, 1060, 1310, 1550, 2000 |
| Optical performance | Confirm for this model | Confirm for this model | Confirm for this model |
| Fiber type | Confirm for this model | SMF-28, PM1550 | SMF-28, PM1550 |
| Connector / control | None, FC/APC, Special | FC/PC, FC/APC, Special | FC/PC, FC/APC, Special |
