Coherent light generators – Particular beam control device – Tuning
Patent
1996-09-17
1998-06-30
Bovernick, Rodney B.
Coherent light generators
Particular beam control device
Tuning
372 50, 372 26, 372 32, 372 33, 372 38, H01S 310, H01S 313, H01S 300, H01S 319
Patent
active
057744858
ABSTRACT:
A wavelength-tunable laser device has an active part comprising an active laser region for generating a laser emission with a predetermined emission wavelength, and a tuning part comprising a tuning region allocated to the active laser region and capable of tuning the emission wavelength of the laser light emitted by the active region. The active part is charged with a chronologically variable modulation current that controls the intensity of the emitted laser emission, and the tuning part is charged with an electrical tuning current for controlling the emission wavelength of the emitted laser light. The active part controls the intensity of the emitted laser light and the tuning part is charged with an electrical tuning current for controlling the emission wavelength of the emitted laser light. The tuning current that is supplied to the tuning part and controls the emission wavelength of the emitted laser light is directly derived from the chronologically variable modulation current. Further, the tuning current directly derived from the chronologically variable modulation current controls the tuning region acting on the active laser region such that the emission wavelength of the emitted laser light is kept independent of the intensity of the modulation current, and is kept essentially at least approximately to a constant value.
REFERENCES:
patent: 4669086 (1987-05-01), Kaede et al.
patent: 5313482 (1994-05-01), Zelenka et al.
patent: 5347529 (1994-09-01), Noe
Electronics Letters--4th January 1990, vol. 26, No. 1 Illek et al "over 7nm (875 GHz) Continuous Wavelength Tuning by Tunable Twin-guide (TTG) Laser Diode" pp. 46-47.
Wolf et al, "Continuously Tunable Metal-Clad Ridge-Waveguide Distributed Feedback Laser Diode" Electronic Letters, vol. 26 No. 22, pp. 1845-1846, Oct. 1990.
Electronics Letters 30th Jul. 1992 vol. 28, No. 16 pp. 1498-1499--"Analysis of Slots in Nonradiating dielectric Waveguide Using The Model Expansion Method" Lourtioz et al.
"Tunable Laser Diodes utilizing Transverse Tuning Scheme"--8217 Journal of Lightwave Technology 11(1993)Jul., No. 7, New York, US Amman et al pp. 1168-1182.
Bovernick Rodney B.
Phan Quyen
Siemens Aktiengesellschaft
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