Optical waveguides – With optical coupler – Switch
Reexamination Certificate
2008-08-29
2009-10-06
Font, Frank G (Department: 2883)
Optical waveguides
With optical coupler
Switch
C385S037000, C385S047000
Reexamination Certificate
active
07599587
ABSTRACT:
In a wavelength selective switch according to the present invention, an isolator is disposed between a lens array and a first lens. The isolator includes an isolator element and a transmitting means. The isolator is disposed so that the isolator element is on light paths of input lights and that the transmitting element is on a light path of an output light. The isolator element is shared among the light paths of the plurality of input lights. The isolator element intercepts lights propagating in an opposite direction to the input lights and prevents coupling of the lights to input ports. The transmitting element transmits the output light and couples it to an output port.
REFERENCES:
patent: 7072539 (2006-07-01), Wu et al.
patent: 2003-101479 (2003-04-01), None
patent: 2006-276216 (2006-10-01), None
patent: 2006-284740 (2006-10-01), None
Kobayashi Kenji
Mitsuhashi Yuji
Nishizawa Toshiki
Tomita Hiroshi
Darby & Darby P.C.
Font Frank G
Mooney Michael P
NTT Electronics Corporation
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