Optical: systems and elements – Optical frequency converter
Reexamination Certificate
2007-09-04
2007-09-04
Doan, Jennifer (Department: 2874)
Optical: systems and elements
Optical frequency converter
C359S328000, C359S332000
Reexamination Certificate
active
11603368
ABSTRACT:
Quasi-phasematching design to provide an approximation to a desired spectral amplitude response A(f) is provided. An initial phase response φ(f) corresponding to A(f) is generated. Preferably, d2φ(f)/df2is proportional to A2(f). Alternatively, φ(f) can be a polynomial in f. A function h(x) is computed such that h(x) and H(f)=A(f)exp(iφ(f)) are a Fourier transform pair. A domain pattern function d(x) can be computed by binarizing h(x) (i.e., approximating h(x) with a constant-amplitude approximation). In some cases, the response provided by this d(x) is sufficiently close to A(f) that no further design work is necessary. In some embodiments of the invention, the need for binarization can be reduced or eliminated by providing amplitude modulation of the effective nonlinearity.
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Arbore Mark A.
Miller Gregory D.
Collinear Corporation
Doan Jennifer
LandOfFree
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