摘要：由于半導體激光器（LD）具有體積小、質量輕、轉換效率高、省電以及可以直接調制等優點，其應用領域日益廣泛。與此同時，對于半導體激光器輸出光功率的穩定性、可靠性、準確性的要求越來越高，作為驅動激光器的驅動電源問題日益凸顯。而且如果輸出的電壓或電流波形質量不高，又缺乏有效的保護措施，就會使激光二極管性能下降或造成永久性損傷。因此我們研究如何利用單片機控制半導體激光電源，從而大大提升半導體激光電源的自動化水平，以滿足半導體激光器發展對驅動電源的要求。本課題研究使用單片機對激光電源進行控制，能簡化激光電源的硬件結構，有效地解決半導體激光器工作的準確、穩定和可靠性等問題。同時為激光器驅動電源性能的提高和擴展提供了有利條件。

　　　本次設計采用STC12C5A16AD單片機作為主控器，采用該單片機自帶AD轉換器對驅動電流、背光電流以及溫度對應的電壓參數進行采集，通過DA轉換器對驅動電流以及溫度進行反饋控制。輸出的電流0～1200mA并且可調，溫度的調節精度達到0.5℃。并且在完成液晶顯示的基礎上，實現了上位機顯示。 

關鍵詞：半導體激光器  單片機  激光電源  溫度控制  上位機

ABSTRACT：As semiconductor laser (LD) is small, light weight, high conversion efficiency, energy saving, can be directly modulated, etc., which are being increasingly used. At the same time, the semiconductor laser output power stability, reliability, accuracy requirements are high, as the driving laser drive power problems have become increasingly prominent. If the output voltage or current waveform quality is not high, but the lack of effective protection measures, it will make the laser diode performance or cause permanent damage.Therefore, we study how to control the use of single semiconductor laser power, thereby greatly enhancing the level of automation in the power semiconductor lasers, semiconductor lasers developed to meet the power requirements of the drive. This study is to use microcontroller to control the laser power, laser power can simplify the hardware structure of a semiconductor laser work effectively solve accurate, stability and reliability issues. While the laser drive performance improvement and expansion of the power provided favorable conditions.

　　　The design uses STC12C5A16AD microcontroller as master, using the AD converter MCU comes on the drive current, the optical power feedback voltage corresponding to current and temperature parameters for the collection, through the DA converter on the drive current and temperature feedback control. The output current 0 ~ 1500mA and adjustable temperature regulation accuracy of 0.5 ℃. And through the liquid crystal display, the host computer display.

Keywords：Semiconductor lasers；microcontroller； laser power supply；temperature control；the host computer