Polarizer implemented in a photonic integrated circuit for use in a fiber optic gyroscope
US11415419B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Oct 11, 2019 |
| Grant date | Aug 16, 2022 |
| Priority date | — |
| Expiry date | Feb 2, 2040 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG02B6/4213
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
A multifunctional photonic integrated circuit (PIC) suitable for the manufacture of fiber optic gyroscopes (FOG) is described. The PIC is constructed and arranged to exhibit a scale factor of substantially high stability and accuracy. The PIC may comprise, for example, a high optical birefringence and low propagation loss waveguide, a low wavelength-dependent split-ratio Y-junction, a high extinction ratio linear polarizer, and high efficiency fiber-to-waveguide mode-size converters. Considerations for ensuring high-level FOG performance are addressed by, for example, optimization of waveguide structure, functional requirements for individual components, and combined effects of the circuit layout. A high-end, tactical grade FOG may be built using the disclosed PIC, after connecting to polarization maintaining optical fiber coil, a light source, and a photodetector.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.