Optical: systems and elements – Optical frequency converter – Harmonic generator
Reexamination Certificate
2005-08-16
2005-08-16
Lee, John D. (Department: 2874)
Optical: systems and elements
Optical frequency converter
Harmonic generator
C359S326000, C359S330000
Reexamination Certificate
active
06930821
ABSTRACT:
A method and a nonlinear frequency mixer employing the method to generate at least one output light from at least one input light with the aid of a quasi-phase-matching (QPM) grating for quasi-phase-matching the input and output light involved in a nonlinear frequency mixing operation such as three-wave mixing, four-wave mixing or other nonlinear operation mediated by a susceptibility of the nonlinear optical material. The QPM grating has a beam-modifying pattern with features for wave front shaping. More specifically, the features shape the wave fronts of the output light by diffraction or phase front shaping to thereby modify its propagation. This modification of propagation can be used to steer, focus, defocusing, split and/or collimate the output light. The features themselves can have various geometric shapes and sizes, even on the order of the wavelength of the output light, and they can include domains exhibiting a nonlinear optical susceptibility χ, such as the second-order susceptibility χ(2), domain edges, and/or spacings between such domains.
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Fejer Martin M.
Kurz Jonathan R.
Lee John D.
Lumen Intellectual Property Services Inc.
The Board of Trustees of the Leland Stanford Junior University
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