| 摘要 |
PROBLEM TO BE SOLVED: To provide a wavelength-variable laser control method which can improve accuracy in wavelength adjustment. ! SOLUTION: A wavelength-variable laser control method of controlling an oscillation wavelength of a semiconductor laser provided with a heater corresponding to a wavelength selection element on the basis of a difference between a detection result of a wavelength detected by a wavelength detection part and a target value comprises: a first step of acquiring from a memory, a wavelength-variable laser drive condition which includes wavelength characteristics of the wavelength detection part corresponding to a first wavelength or detection part information for defining the target value corresponding to the first wavelength and a control target value of the heater; a second step of updating the detection part information and the control target value of the heater acquired in the first step to values corresponding to a second wavelength on the basis of a wavelength difference between |
