Optical: systems and elements – Optical frequency converter – Harmonic generator
Reexamination Certificate
2003-12-19
2009-11-03
Sanghavi, Hemang (Department: 2874)
Optical: systems and elements
Optical frequency converter
Harmonic generator
C359S328000, C372S022000, C252S582000, C252S587000
Reexamination Certificate
active
07612935
ABSTRACT:
A device and method for producing a third harmonic signal from an optical pulse of wavelength k. In the device and method, an optical pulse at a wavelength k is incident on a material including at least one molecule having a formula D—U—A, where D is an electron donor group, A is an electron acceptor group, and Π is a conjugated structure having it bonds that connect D to A. The molecule exhibits a strong absorption band centered at a wavelengthkoand a weakly absorbing region centered at a wavelength k, which is less than Xo. A wavelength k/2 has a value of about Xo, and a wavelength k/3 has a value of about X1. A third harmonic signal at k/3 is generated. From a measured third harmonic signal as a function of a time delay for separate optical pulses entering the material, at least one of a pulse width and a pulse shape of the optical pulse can be extracted. From a spectrally resolved third harmonic signal, a phase of the optical pulse can be extracted.
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Cha Myoungsik
Kippelen Bernard
Marder Seth R.
Ramos-Ortiz Gabriel
Oblon, Spivak McClelland, Maier & Neustadt, L.L.P.
Sanghavi Hemang
The Arizona Board of Regents on Behalf of The University of Ariz
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