基于MAX1968的半导体激光电源设计

作为激光器重要组成部分的激光器电源,其输出不仅要求大电流、低电压、高稳定度,而且工作脉冲频率较高(可达50 MHz)。针对此目标,设计了一种个将5 V、4 A转换为2.4 V、3.3 A恒流输出的激光器电源输出转换电路,为激光器提供稳定的电流,并通过TTL控制电路使输出频率可调。除此之外,笔者本文还讨论了一种半导体激光温度控制电路的设计方案,采用高集成、高性价比和高效率开关型驱动芯片MAX1968实现热电致冷驱动电路,能够实时监视和控制激光器温度,以稳定激光器的输出功率和波长。

Semiconductor laser power based on MAX1968

As an important part of laser,laser power’s output is required of high current,low voltage,high stability and high frequency pulse(up to 50MHz).According to this requirement,this paper designed a constant current output circuit which converts 5V4A into 2.4V3.3A to provide stable current to the laser.Through TTL control circuits,the output frequency is adjustable.In addition,this paper also discussed a circuit design to control the temperature of a semiconductor laser,which can real-time monitor and control laser’s temperature to stabilize the laser output power and wavelength.TEC driver circuit is realized with high integration,cost-effective and high-efficiency switching-type driver IC MAX1968.