Optical: systems and elements – Optical modulator – Light wave temporal modulation
Reexamination Certificate
2005-08-23
2005-08-23
Dang, Hung Xuan (Department: 2873)
Optical: systems and elements
Optical modulator
Light wave temporal modulation
C398S081000, C398S079000, C398S147000
Reexamination Certificate
active
06934069
ABSTRACT:
A chromatic dispersion compensation device selectively delays a respective portion of spectral sections of each respective optical channel of an optical WDM input signal to compensate each optical channel for dispersion compensation, and includes a spatial light modulator having a micromirror device with a two-dimensional array of micromirrors. The micromirrors tilt or flip between first and second positions in a “digital” fashion in response to a control signal provided by a controller in accordance with a switching algorithm and an input command. A collimator, diffraction gratings, and Fourier lens collectively collimate, disperse and focus the optical input channels onto the array of micromirrors. Each optical channel is focused onto micromirrors of the micromirror device, which effectively pixelates the optical channels. To compensate an optical channel for chromatic dispersion, a portion of the spectral sections of each channel is delayed a desired time period by tilting an array of mirrors (i.e., spectral array) disposed in each spectral section at different spatial positions on the micromirror device.
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Davis Michael A.
Dawson Jay W.
Dunphy James R.
Kersey Alan D.
Moon John A.
CiDRA Corporation
Dang Hung Xuan
Martinez Joseph P.
Ware Fressola Van Der Sluys & Adolphson LLP
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