Optical phase shifter, optical interferometer based thereupon, and method of manufacture thereof
US10386660B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Mar 31, 2017 |
| Grant date | Aug 20, 2019 |
| Priority date | — |
| Expiry date | Mar 31, 2037 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG02F2201/06
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
A phase shifting optical device and method of manufacture is provided. In an embodiment, the phase shifting optical device may include a first arm defining a first arm optical path, a second arm defining a second arm optical path, a beam splitter for splitting an input optical beam into first and second sub-beams for propagating in the first and second arm optical paths, respectively, and a beam combiner for combining the first and second sub-beams propagated in the first and second arm optical paths, respectively, into an output optical beam. The first arm including a carrier modification element to induce a phase shift in the first arm optical path relative to the second arm optical path. A cladding may be provided proximate to the first arm, the cladding having a temperature coefficient of refractive index (dn/dT)cl opposite in sign to a temperature coefficient of refractive index (dn/dT)a of the first arm.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.