Optical waveguides – With optical coupler – Plural
Reexamination Certificate
2005-04-12
2005-04-12
Lee, John D. (Department: 2874)
Optical waveguides
With optical coupler
Plural
C385S033000, C385S037000
Reexamination Certificate
active
06879749
ABSTRACT:
An optical device for demultiplexing an optical signal comprises a grating that receives an optical signal comprising a plurality of wavelength channels, and generates a plurality of spatially separated light beams. Each light beam is associated with a particular wavelength channel. The optical device further comprises an optical element that at least partially compensates a temperature based frequency shift associated with the spatially separated light beams. The optical device further comprises a plurality of lenses and a plurality of fibers. The plurality of lenses are arranged such that a spacing between at least a pair of lenses is determined to at least partially compensate a non-linearity introduced by the grating. Each fiber is associated with a corresponding lens and receives a corresponding light beam. At least one fiber is placed a distance that is less than a focal length associated with its corresponding lens.
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PCT Report for PCT/US02/37941, 6 pp, Feb. 26, 2003.
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Lin Leo Yu-Yu
Lu YanQing
Wong Seng-leong
Baker & Botts L.L.P.
EC-Optics Technology Inc.
Lee John D.
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