Comb wavelength division multiplexer
US6608719B1 · kind B1 · utility
Assignee
Inventors
Key dates
| Filing date | Oct 26, 2000 |
| Grant date | Aug 19, 2003 |
| Priority date | — |
| Expiry date | Oct 26, 2020 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04J14/06
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
The invention discloses a comb wavelength division multiplexer, comprising: an input device at input side, a polarization splitter, a &lgr;/2 phase delay wave plate; a birefringent crystal filter; and a reflective parallel light polarization splitter for reflecting an incident light beam from the birefringent crystal filter into the birefringent crystal filter again, and passing the reflected light beam through the &lgr;/2 phase delay wave plate and the polarization splitter to an output side, so that the input side and the output side are a same side. The invention uses only one-stage filter to obtain a two-stage filtering effect. The channel isolation factor is improved and the size of the apparatus is reduced (FIG. 2).
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.