Semiconductor laser device, and method and program for driving the same
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United States of America Patent
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Sep 19, 2023
Grant Date -
Sep 17, 2020
app pub date -
Sep 20, 2018
filing date -
Dec 15, 2017
priority date (Note) -
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Abstract
The present invention is intended to reduce variations in oscillation wavenumber of a semiconductor laser element due to the influence of circumferential temperatures. The invention includes a semiconductor laser semiconductor laser element, a temperature control part to control a temperature of the semiconductor laser element, a temperature sensor to detect a temperature of the temperature control part, and a temperature control device to control a supply signal to the temperature control part so that a detected temperature obtained from the temperature sensor reaches a predetermined target temperature. The temperature control device changes a target temperature for the temperature control part depending on a supply signal to the temperature control part.
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