| 摘要 |
PROBLEM TO BE SOLVED: To shorten the time required for inspecting many semiconductor lasers. SOLUTION: The oscillation wavelength of a semiconductor laser is tuned to a prescribed target wavelength, by acquiring a corrected wavelength coefficient of replacing the fundamental wavelength coefficient of the laser from the variations in wavelength changing item for changing the wavelength of the laser and the ratio between an actually measured wavelength, which varies depending on the changes of the wavelength changing item and a target wavelength. In this case, the corrected wavelength coefficient is first found once, and thereafter, the tuning is conducted, based on the first found corrected wavelength coefficient, without finding corrected wavelength coefficients one after another.
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