Optical waveguide module having waveguide substrate made of predetermined material and ferrule made of material different from that of waveguide substrate
US5625730A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Jul 21, 1995 |
| Grant date | Apr 29, 1997 |
| Priority date | — |
| Expiry date | Jul 21, 2015 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG02B6/4239
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
This invention relates to an optical waveguide module having stable temperature characteristics and moist heat characteristics even in a severe environment. This optical waveguide module includes a waveguide component having an optical waveguide on a waveguide substrate made of silicon or silica glass as the first material, and a ferrule made of a plastic material as the second material. An end face of an optical fiber is fixed by adhesion while it is inserted in a through hole of the ferrule, the through hole having a continuous inner wall. This ferrule is fixed with an adhesive having a predetermined strength so that its the end face opposes the end face of the waveguide component. The second material satisfies a relationship: EQU .vertline..DELTA.L/(E.sub.1 /E.sub.2).vertline.<3.0.times.10.sup.-6 (.degree.C..sup.-1) with respect to the first material forming the waveguide substrate, where .DELTA.L is a difference in thermal expansion coefficient between the first material and the second material, E.sub.1 is a modulus of elasticity of the first material, and E.sub.2 is a modulus of elasticity of the second material.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.