Broadband restricted MMI-based polarization beam splitter
US9547131B1 · kind B1 · utility
Assignee
Inventor
Key dates
| Filing date | May 5, 2016 |
| Grant date | Jan 17, 2017 |
| Priority date | — |
| Expiry date | May 5, 2036 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG02B6/29344
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
A compact polarization beam splitter is formed by cascading two stages of three restricted MMIs. Each MIMI is configured to set ultra compact width and length for a rectangular waveguide body to limit no more than 4 modes therein working as a polarization beam splitter in a 50 nm wavelength window around 1300 nm. Each MMI is further configured to couple an input at a first end and a TE bar output and a TM cross output at a second end of the rectangular waveguide body. The locations of the input/output waveguide ports are designated to be a distance of ⅙ of the width away from a middle line from the first end to the second end. Two second-stage MMIs have their inputs coupled to the TE bar output and the TM cross output of the first-stage MMI and provide a second-stage TE bar output and a second-stage TM cross output, respectively.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.