【摘要】 半导体激光器晶体在工作中对热效应产生的影响非常敏感,因此,对激光器的晶体温度要求非常高。设计了一种改进型的脉宽调制电路,其采用了数字和模拟电路相结合的方法,通过改变输出电压的脉冲宽度和幅值,对驱动电流的方向和大小分别控制就可以在输出端得到不同的输出功率。这样就可以控制半导体制冷器(TEC)的输出功率,进行温度的粗调和微调,粗调使TEC快速升温或降温,微调使系统最终达到动态稳定。更多还原

【Abstract】 The influence of heat effect at work of semiconductor laser crystal is very sensitive,so the request of the temperature of the laser crystal is very important.A kind of the improved circuit of pulse width modulating is designed,which adopts the method of the figure combining with simulation circuit,through changing the width of pulse and amplitude of the voltage of output to control the direction and size of the electric current,then different output power in the output end can be received.In this way,the output power of the semiconductor refrigeration device(TEC)can be controlled to realize the thick mediation of the temperature which makes TEC intensify or lower the temperature fast to adjust thickly,and the finely tune of the temperature which makes the system reach the dynamic stability finally.更多还原