Coherent light generators – Particular beam control device – Optical output stabilization
Reexamination Certificate
2005-09-27
2005-09-27
Harvey, Minsun Oh (Department: 2828)
Coherent light generators
Particular beam control device
Optical output stabilization
C372S018000, C372S019000, C372S043010, C372S101000, C372S108000
Reexamination Certificate
active
06950452
ABSTRACT:
A semiconductor laser module including a semiconductor laser device having an integrated diffraction grating configured to output a multiple mode laser beam in the presence of a driving current, an optical fiber configured to guide the multiple mode laser beam to an output of the laser module, and an optical attenuation device configured to attenuate the multiple mode laser beam by an amount sufficient to provide a predetermined output power from the output of the laser module. The optical attenuation device may be an optical coupling lens offset from an optimum coupling position by an amount sufficient to provide the predetermined output power, or an optical attenuator interrupting the optical fiber and configured to attenuate the multiple mode laser beam by an amount sufficient to provide the predetermined output power. Also, a two fiber Raman amplifier having a super large area (SLA) fiber that provides amplification of the signal based primarily on the forward excitation light can also be used to suppress SBS.
REFERENCES:
patent: 6384963 (2002-05-01), Ackerman et al.
patent: 2002/0048300 (2002-04-01), Tsukiji et al.
patent: 2002/0080833 (2002-06-01), Matsuura et al.
Kado Souko
Kimura Toshio
Tsukiji Naoki
Yoshida Junji
Harvey Minsun Oh
Rodriguez Armando
The Furukawa Electric Co. Ltd.
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