Optical waveguide and manufacturing thereof
US6256441A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Jul 9, 1999 |
| Grant date | Jul 3, 2001 |
| Priority date | — |
| Expiry date | Jul 9, 2019 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG02B2006/1219
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
Disclosed are a method of manufacturing an optical waveguide including core portions having a small surface roughness and also having highly accurately rectangular shapes without requiring a large number of the manufacturing steps, and an optical waveguide with a small propagation loss of light. The optical waveguide includes a substrate; a lower clad layer formed on the substrate; core portions formed on the lower clad layer; and an upper clad layer formed to cover the lower clad layer and the core portions; wherein the substrate is made from a material which is transparent to light having a specific wavelength, and the core portions are made from a material which is hardened by irradiation of the light having the specific wavelength. If the light having the specific wavelength is ultraviolet light, the core portions are made from an ultraviolet hardening-type material hardened by irradiation of ultraviolet light and the substrate is made from either quartz or glass transparent to ultraviolet light.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.