The Research Of LD Pumped Green Little Power Continuous Solid-State Laser And The Driver

With the development of laser material and diode laser technology, the diode pumped solid-state laser (DPSSL) is becoming one of significant item in the laser researching field. DPSSL has a lot of advanced characteristic such as compacting structure,stabilization,high efficiency,high beam factor,long lifetime etc.. so the DPSSL is applied to more fields such as science researching,war industry,navigate and spaceflight,national defense,biology and medicine,spectrum analysis,information and communication,circumstance protecting and amusement etc..Based of theory model of DPSSL and characteristic of laser crystal, octave crystals to designs the high efficiency and adjustable coupling focus system of pump light and the high efficiency stability flat-concave and frequency-doubling resonance structure for the single laser diode end-pumped solid state laser. And the max current of driver is up to7A and the peak-peak ripple of current is blow±0.16%. The protect circuit is designed for long lifetime of laser diode such as on and off delay of driver,max current limited,reverse current limited and max operating temperature limit of laser diode. In addition, the input circuit of analog and TTL modulating signal is designed in this driver for receiving the exterior modulating signal, the exterior modulating analog signal could be the 0~5V voltage signal and the frequency of exterior TTL modulating signal can be up to 20kHz. To use the driver the output power of the 16.7% high optics-optics transition efficiency 532nm green light laser is 350mW, the power stability of this laser is up to±2.57%.