Wavelength division element and optical module
US7215885B2 · kind B2 · utility
Assignees
Inventors
Key dates
| Filing date | Jul 26, 2004 |
| Grant date | May 8, 2007 |
| Priority date | — |
| Expiry date | Dec 27, 2024 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG02B27/1073
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
A wavelength division element includes a first filter and a second filter. The first filter has incident angle-to-transmission wavelength characteristics and separates multiplexed lights in a plurality of wavelength bands into first lights that are in a first wavelength band and first reflected lights. The first filter allows the first lights to pass through in a first direction and reflects the first reflected lights in a second direction. The second filter is located in the second direction and separates the first reflected lights into second lights that are in a second wavelength band and second reflected lights. The second filter allows the second lights to pass through in a third direction and reflects the second reflected lights in a fourth direction.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.