Optical waveguides – With optical coupler – Switch
Reexamination Certificate
2007-08-14
2007-08-14
Font, Frank G. (Department: 2883)
Optical waveguides
With optical coupler
Switch
C385S024000, C385S033000, C385S037000, C385S046000, C385S129000, C385S014000
Reexamination Certificate
active
11073010
ABSTRACT:
Wavelength-selective switches (WSSs) having embedded multiplexer or demultiplexer functionality include a stack of planar waveguide circuits (PLCs) in which all but one of the PLCs have identical features consisting of a single waveguide connected to a free space region, further connected to a waveguide array that terminates at the PLC edge facet, which are placed at the front focal plane of a lens, generating a spectrally resolved optical signal at the back focal plane of the lens. Due to the use of a single lens, the spectrally resolved optical signal of all the PLCs are superimposed, differing only by propagation direction. A tilting micro-mirror array at the back focal plane reflects the spectral components, implementing a wavelength-selective switch. The reflected light can couple to any of the remaining PLCs, for multiplexing, or to the different PLC in the stack, which implements the multiplexer/demultiplexer.
REFERENCES:
patent: 6778739 (2004-08-01), Jerphagnon et al.
patent: 2003/0206684 (2003-11-01), Nishi et al.
patent: WO 03/098856 (2003-11-01), None
patent: WO 03/098962 (2003-11-01), None
Doerr Christopher Richard
Marom Dan Mark
Font Frank G.
Lucent Technologies - Inc.
Mooney Michael P.
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