Semiconductor optical reflector and a method of manufacturing the same
US6064685A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Feb 24, 1999 |
| Grant date | May 16, 2000 |
| Priority date | — |
| Expiry date | Feb 24, 2019 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH01S5/18361
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
The invention relates to a semiconductor optical reflector serving in particular for being disposed facing an integrated laser cavity so as to feed light back into said cavity, and enable it to oscillate continuously. The reflector is made up of a plurality of cascaded Bragg reflector sections. More particularly, said sections are of the same length L and have the same coupling coefficient, and the length L of each pair of sections is given by the following relationship: EQU L=.lambda..sup.2 /[(n.sub.i+1 +n.sub.i).times.1.7(n.sub.i+1 .LAMBDA..sub.i+1 -n.sub.i .LAMBDA..sub.i)] PA1 where .lambda. is the mean value of the Bragg wavelengths reflected by the reflector; PA1 n.sub.i+1 and n.sub.i are the respective effective refractive indices of said adjacent sections; and PA1 .LAMBDA..sub.i+1 and .LAMBDA..sub.i are the respective periods of said adjacent sections. The reflector of the invention has a wide spectrum band independent of the value of the coupling coefficient.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.