公开(公告)号：US09166360B2

公开(公告)日：2015-10-20

申请号：US14220117

申请日：2014-03-19

Applicant: USHIO DENKI KABUSHIKI KAISHA

Inventor： Yoshihiro Horikawa ,  Takayuki Kozakura ,  Tetsuya Ozawa ,  Toru Nishikubo ,  Takanori Samejima ,  Kazuhiro Yoshida

IPC: H01S5/00 ,  H01S3/109 ,  H01S5/14 ,  G02F1/35 ,  H01S5/022 ,  H01S5/024 ,  H01S5/062

CPC classification number: H01S3/109 ,  G02F1/353 ,  G02F2203/60 ,  H01S5/005 ,  H01S5/02208 ,  H01S5/02296 ,  H01S5/02446 ,  H01S5/06216 ,  H01S5/141

Abstract: The fundamental wave light emitted from a semiconductor laser is converted in wavelength by a wavelength conversion element and emitted therefrom. A lighting circuit lights the semiconductor laser, and a temperature control unit 21b controls the amount of electric power supply to a heater so that the temperature of the wavelength conversion element turns into temperature at which the wavelength conversion efficiency thereof becomes optimal. When a state where the amount of electric power supply of the heater is lower limit or below continues for a predetermined period or longer, the hang-up suppressing unit 21c, or when duration time in a state where the temperature of the wavelength conversion element is higher than the control target temperature becomes higher than a constant value, laser lighting current is decreased by a preset amount, thereby recovery from a high temperature hang-up state performed.

Abstract translation: 从半导体激光器发射的基波波长被波长转换元件转换并从其发射。 照明电路点亮半导体激光器，并且温度控制单元21b控制对加热器的电力供应量，使得波长转换元件的温度变为波长转换效率最佳的温度。 当加热器的电力供应量低于或等于下限的状态持续预定时间或更长时间时，停止抑制单元21c，或者当波长转换元件的温度为 高于控制目标温度变得高于恒定值时，激光照明电流降低预定量，从而进行高温挂起状态的恢复。