Coherent light generators – Particular beam control device – Nonlinear device
Reexamination Certificate
2006-07-25
2006-07-25
Harvey, Minsun (Department: 2828)
Coherent light generators
Particular beam control device
Nonlinear device
C372S020000
Reexamination Certificate
active
07082146
ABSTRACT:
A method for easily and quickly evaluating the wavelength variability properties of a wavelength-variable semiconductor laser is provided. An inspection device includes a power source for supplying current to a wavelength-variable DBR semiconductor laser having an active region, a phase control region, and a DBR region, a photo-detector for detecting an output intensity of laser beam emitted from the wavelength-variable DBR semiconductor laser, and a transmission type wavelength-selection element that can be inserted into a light path from the wavelength-variable DBR semiconductor laser to the photo-detector. In a state where the transmission type wavelength-selection element is inserted into the light path from the wavelength-variable DBR semiconductor laser to the photo-detector, at least one of a phase current that is supplied to the phase control region and a DBR current that is supplied to the DBR region is changed with respect to a predetermined active current that is supplied to the active region, and the output intensity of the laser beam after the laser beam has passed through the transmission type wavelength-selection element is detected by the photo-detector.
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Kitaoka Yasuo
Yamamoto Kazuhisa
Yokoyama Toshifumi
Hamre Schumann Mueller & Larson P.C.
Harvey Minsun
Matsushita Electric - Industrial Co., Ltd.
Nguyen Phillip
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