Back reflection circulator in silicon photonic chip methods and apparatus
US11353882B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Sep 28, 2018 |
| Grant date | Jun 7, 2022 |
| Priority date | — |
| Expiry date | Mar 12, 2041 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG02B2006/12061
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
Apparatuses and methods associated with silicon photonic chips, are disclosed herein. In some embodiments, a quarter wave plate (QWP) is provided to a silicon photonic chip to convert a first linearly polarized mode (e.g., TE mode) optical beam from a laser disposed on the silicon photonic chip, into a combination of orthogonal polarization modes optical beam, and to convert or contribute in converting a reflection of the combined polarized modes optical beam into a second linearly polarized mode (e.g., TM) optical beam with polarization orthogonal to the first. The optical beam is rotated relative to an axis of the QWP, or the QWP and its axis are rotated relative to a polarization axis of the optical beam. Other embodiments are also described and claimed.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.