Optical: systems and elements – Optical frequency converter
Reexamination Certificate
2006-03-07
2006-03-07
Lee, John D. (Department: 2874)
Optical: systems and elements
Optical frequency converter
C359S332000
Reexamination Certificate
active
07009759
ABSTRACT:
A multi-channel optical frequency mixer for all-optical signal processing and a method for engineering the same. The multi-channel mixer uses a nonlinear optical material exhibiting an effective nonlinearity deffwhose spatial distribution is defined by a quasi-phase-matching grating, e.g., a QPM grating. The spatial distribution is defined such that its Fourier transform to the spatial frequency domain defines at least two wavelength channels which are quasi-phase-matched for performing optical frequency mixing. The wavelength channels correspond to dominant Fourier components and the Fourier transform is appropriately adjusted using grating parameters such as grating periods, phase reversal sequences and duty cycles to include an odd or even number of dominant Fourier components. The multi-channel mixer can perform frequency mixing operations such as second harmonic generation (SHG), difference frequency generation (DFG), sum frequency generation (SFG), and parametric amplification.
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Chou Ming-Hsien
Fejer Martin M.
Parameswaran Krishnan
Lee John D.
Lumen Intellectual Property Services Inc.
The Board of Trustees of the Leland Stanford Junior University
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