Coherent light generators – Particular beam control device – Optical output stabilization
Reexamination Certificate
2006-01-03
2006-01-03
Harvey, Minsun Oh (Department: 2828)
Coherent light generators
Particular beam control device
Optical output stabilization
C359S364000
Reexamination Certificate
active
06983000
ABSTRACT:
A laser diode module includes a laser diode device, a first photo detector part for receiving, first divided light that is a first portion of light when at least one of light emissions of the laser diode device is divided into two portions of light each traveling a different optical path, a second photo detector part for receiving second divided light that is a second portion of light thus divided via at least a wavelength selective member, and a controller which controls the lasing wavelength of the laser diode device on the basis of outputs of the first and second photo detector parts. A beam splitter provided between the laser diode and the wavelength selective member divides light emitted from the laser diode into the first and second divided light and a quarter-wave plate is provided in an optical path between the beam splitter and the wavelength selective member.
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Furuichi Hiroaki
Kawamoto Kazumi
Kuroguchi Katsumi
Tatsuno Kimio
Antonelli, Terry Stout and Kraus, LLP.
Harvey Minsun Oh
Hitachi , Ltd.
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