Multi-wavelength optical reflector
US6345135B1 · kind B1 · utility
Inventors
Key dates
| Filing date | May 6, 1999 |
| Grant date | Feb 5, 2002 |
| Priority date | — |
| Expiry date | May 6, 2019 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH01S5/1246
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
A multi-wavelength optical reflector comprises a diffraction grating structure (18) which comprises a plurality of repeat grating units (20) in which each grating unit (20) comprises a series of adjacent diffraction gratings (22, 24, 26) having the same pitch. The grating units (20) and adjacent gratings within a grating unit are separated by a phase change (28) of substantially pi (&pgr; radians). The lengths of the gratings (22, 24, 26), which are different for each grating within a grating unit, are selected so as to provide a predetermined comb reflection spectrum which comprises a plurality of reflection maxima of substantially equal reflectivity.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.