Semiconductor laser device and method for controlling semiconductor laser

The present invention relates to a semiconductor laser device and a method for controlling a semiconductor laser. A semiconductor laser device includes: a semiconductor laser having a reflector region, a gain region for laser oscillation and a plurality of refraction index controllers, the reflector...

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1. Verfasser: BANNO EIICHI
Format: Patent
Sprache:chi ; eng
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Zusammenfassung:The present invention relates to a semiconductor laser device and a method for controlling a semiconductor laser. A semiconductor laser device includes: a semiconductor laser having a reflector region, a gain region for laser oscillation and a plurality of refraction index controllers, the reflector region having a plurality of segments in which a diffraction region and a space region are coupledto each other, the plurality of segments being separated into a plurality of segment groups having a same optical length, the plurality of refractive index controllers being provided according to each segment group and controlling an equivalent refraction index of each segment group; a wavelength controller controlling an oscillation wavelength of the semiconductor laser by controlling the plurality of the refraction index controllers as at least one of control parameters; and a dither controller inputting a dither signal into only one of the segment groups having the most segments from one of the refractive index con