Radiation scribed waveguide coupling for photonic circuits
US9329341B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Aug 22, 2012 |
| Grant date | May 3, 2016 |
| Priority date | — |
| Expiry date | Oct 22, 2033 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG02B6/29331
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
Optical waveguide coupling ratios can be modified for a package by providing a substrate with a photonic circuit disposed on a first section of the substrate and a plurality of optical waveguides formed in glass disposed on a second section of the substrate, the waveguides being connected to the photonic circuit, adjacent ones of the waveguides having a fixed coupling ratio. A three-dimensional region of the glass abutting an end of one or more of the waveguides is lased to change a refractive index of the glass in each three-dimensional region, and thereby extend a length of each waveguide abutting one of the three-dimensional regions so that the coupling ratio between that waveguide and an adjacent waveguide is changed as a function of the extended length. The lasing is controlled based on feedback so that each coupling ratio changed by the lasing varies by less than a target amount.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.