PROCEEDINGS ARTICLE | November 15, 2017
Proc. SPIE. 10605, LIDAR Imaging Detection and Target Recognition 2017
KEYWORDS: Capacitors, Aerospace engineering, Laser applications, Laser development, Power supplies, Control systems, Semiconductor lasers, Bridges, Pulsed laser operation, Temperature metrology
Solid laser pumped by semiconductor laser has the large value in the area of space laser technology, because of the advantages of high efficiency, small volume and long life. As the indispensable component of laser, laser power is also very important. Combined with ZY3(02) laser altimeter project, a high voltage(0～300V), high current(0～80A), long pulse width(0～230us) and high precision temperature semiconductor laser power is developed. IGBT is applied in the driving circuit as the switch to provide a current pulse for LD. The heating or cooling capacity of TEC is controlled by PID compensation circuit quickly adjusts the duty cycle of the UC1637 PWM signal, to realize the high accuracy controlling of LD working temperature. The tests in the external ambient temperature of 5°C, 20°C, 30°C show that the LD current pulse is stable and the stability of LD working temperature up to ±0.1°C around the set point temperature, which ensure the highly stable operation of DPL.
