Coherent light generators – Particular beam control device – Tuning
Patent
1999-04-21
2000-01-25
Scott, Jr., Leon
Coherent light generators
Particular beam control device
Tuning
372 32, 372102, 372 98, 372107, H01S 310
Patent
active
06018535&
ABSTRACT:
An external cavity type wavelength-tunable light source including an optical amplifier on one end surface of which an antireflection film is coated, a diffraction grating arranged on an emission light axis of the optical amplifier on the side of the antireflection film and having wavelength selectivity, a reflector arranged on a reflection light axis of the diffraction grating, for reflecting a reflection light beam from the diffraction grating, and a wavelength tuning mechanism for tuning a wavelength of an lasing light beam by changing an angle of the reflector relative to the reflection light axis of the diffraction grating. The wavelength tuning mechanism includes a bimorph type piezo-electric element as a wavelength-tunable controlling unit for changing an angle of the reflector relative to the reflection light axis of the diffraction grating, and a wavelength-tunable driving circuit for controlling a voltage applied to the bimorph type piezo-electric element to tune the wavelength of the lasing light beam.
REFERENCES:
patent: 5347527 (1994-09-01), Favre et al.
patent: 5550850 (1996-08-01), Lee et al.
patent: 5594744 (1997-01-01), Lefevre et al.
patent: 5802085 (1998-09-01), Lefevre et al.
patent: 5862162 (1999-01-01), Maeda
Ando Electric Co. Ltd.
Jr. Leon Scott
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