Optical: systems and elements – Optical frequency converter
Reexamination Certificate
2008-01-24
2010-10-19
Sanghavi, Hemang (Department: 2874)
Optical: systems and elements
Optical frequency converter
C359S328000, C359S330000, C372S021000, C372S022000
Reexamination Certificate
active
07817334
ABSTRACT:
A wavelength conversion element includes a second harmonic wave generating element provided with an entrance surface and an emission surface, a function of converting an incident fundamental wave into a second harmonic wave with a different wavelength and emitting the second harmonic wave, and a cyclic polarization inversion structure configured so as to be able to match a phase of the second harmonic wave in a pseudo manner, and a first wavelength dispersive optical element disposed on the entrance surface side of the second harmonic wave generating element, having a first diffraction surface for diffracting an incident light beam with a diffraction angle increasing in accordance with a wavelength of an incident light beam to disperse the incident light beam by the wavelength of the incident light beam, and for emitting the light beam dispersed in the first diffraction surface towards the second harmonic wave generating element.
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Komatsu Akira
Kumagai Keiko
Oliff & Berridg,e PLC
Sanghavi Hemang
Seiko Epson Corporation
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