Wavelength selective switch

Details Wavelength selective switch Wavelength selective switch

2008-03-11

2009-12-22

Font, Frank G (Department: 2883)

Optical waveguides

With optical coupler

Switch

C385S017000, C385S037000, C359S201200, C359S204100, C359S320000, C398S048000, C398S049000, C398S050000

Reexamination Certificate

active

07636503

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.

REFERENCES:
patent: 6661948 (2003-12-01), Wilde
patent: 7447399 (2008-11-01), Aota et al.

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