Manufacturing method for optical coupler/splitter and method for adjusting optical characteristics of planar lightwave circuit device
US7046881B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Jan 29, 2002 |
| Grant date | May 16, 2006 |
| Priority date | — |
| Expiry date | Feb 17, 2023 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG02B2006/121
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
The present invention relates a method for manufacturing an optical coupler/splitter. A Y-shaped waveguide core is formed by focusing a laser beam into a cladding layer that is formed from a glass material. At least one portion of this Y-shaped waveguide core other than the input port and the output ports is treated as a refractive index adjustment area. After the portions of the Y-shaped waveguide core other than the refractive index adjustment area have been formed by focusing a laser beam, signal light is inputted into the input port of the Y-shaped waveguide core and the signal light outputted from the output ports of the Y-shaped waveguide core are monitored. The refractive index of the refractive index adjustment area is determined based on the result of the monitoring and is adjusted by focusing a laser beam repeatedly.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.