Wavelength selective switch
US7636503B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Mar 11, 2008 |
| Grant date | Dec 22, 2009 |
| Priority date | — |
| Expiry date | Jul 5, 2028 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG02B6/3558
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
A wavelength selective switch of the present invention angularly disperses lights output from a plurality of input ports of an input and output optical system, to an X-direction, according to wavelength, by a diffraction grating to supply the dispersed lights to a condenser lens. The condenser lens is arranged so that a center axis thereof is shifted to the X-direction relative to an axis passing through the center of spreading angle to the X-direction of output beams from the diffraction grating, and accordingly, at a non-operating time, the light of each wavelength passed through the condenser lens is incident on each movable mirror being tilted by an offset angle corresponding to a shift amount of the condenser lens. As a result, it becomes possible to block the connection between an input side and an output side at the non-operating time without degrading the performance at an operating time.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.