Coherent light generators – Particular component circuitry – Optical pumping
Patent
1997-12-17
1999-11-09
Healy, Brian
Coherent light generators
Particular component circuitry
Optical pumping
372 32, 372 34, 372 36, 372 49, 372 98, 372102, H01S 300
Patent
active
059827947
ABSTRACT:
An external resonator type variable-wavelength LD light source which can compensate errors of a change in an oscillation wavelength caused by a change in an LD driving current, a change in the oscillation wavelength caused by a change in a temperature of an entire light source unit, a difference between set and actual wavelengths caused by mechanical factors to thereby ensure a wavelength reproducibility of 0.001 nm even when the LD driving current or operational temperature varies. The light source includes a light source unit temperature detection member for detecting a temperature of an entire semiconductor laser light source unit; a storage unit for storing therein oscillation wavelength changes of the semiconductor laser light source unit on the basis of a change in a driving current to the semiconductor laser, of a change in the temperature of the entire semiconductor laser light source unit detected by the light source unit temperature detection member, and of a change in an encoder output value measured by an encoder; and a wavelength change compensation member for compensating a change of the oscillation wavelength of the semiconductor laser light source unit on the basis of the oscillation wavelength changes stored in the storage unit.
REFERENCES:
patent: 4908829 (1990-03-01), Kruglii et al.
patent: 5042042 (1991-08-01), Hori et al.
patent: 5287367 (1994-02-01), Yanagawa
patent: 5414727 (1995-05-01), Berndt et al.
patent: 5467363 (1995-11-01), Okabayashi
patent: 5491714 (1996-02-01), Kitamura
patent: 5493575 (1996-02-01), Kitamura
patent: 5521738 (1996-05-01), Froberg et al.
patent: 5579327 (1996-11-01), Ohtateme et al.
patent: 5604758 (1997-02-01), AuYeung et al.
patent: 5706301 (1998-01-01), Lagerstrom
patent: 5844928 (1998-12-01), Shastri et al.
patent: 5867513 (1999-02-01), Sato
patent: 5889803 (1999-03-01), Pfeiffer et al.
Patent Abstracts of Japan, vol. 095, No. 008, Sep. 29, 1995 & JP 07 131103 A (Laser Noshuku Gijutsu Kenkyu Kumiai; Others: 01), May 19, 1995, 1 page.
Ando Electric Co. Ltd.
Healy Brian
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