| 摘要 |
A laser light source (100) includes a semiconductor laser (101), a wavelength converting element (104) made of a non-linear optical crystal for converting excitation light from the semiconductor laser (101) into wavelength converted light having a wavelength different from the wavelength of the excitation light, a photodiode (109) for measuring a part of the wavelength converted light to be emitted from the wavelength converting element (104) as output light, a photodiode (110) for measuring the excitation light to be emitted from the wavelength converting element (104), and a control circuit (103), wherein the control circuit (103) simultaneously performs an output constant control of making the intensity of the wavelength converted light constant, using a current driving circuit (102), and a temperature control of adjusting the temperature of the wavelength converting element (104), using a heater (105).
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