文档介绍：半导体激光器的驱动电源设计
目录
摘要 1
Abstract 2
1前言 3
2系统方案论证与及技术路线 4
4
4
3模拟电路部分的系统方案设计 5
5
6
10
3. 3短路保护电路 14
3. 4延时软启动 14
15
限流保护电路 16
4数字电路部分的系统方案设计 18
18
22
22
23
A/D转换电路 26
D/A转换电路 29
31
33
5 系统软件开发 34
6 结论 36
致谢 37
参考文献 38
附录 39
摘要
半导体激光器(LD)是一种电流注入式电致发光器件, 其工作特性和使用寿命主要取决于驱动电流源的性能优劣。本文作者设计了一种数控半导体激光器驱动电源,该电源采用单片机控制,通过键盘设定工作电流值和限定电流值,并在LCD 屏上显示,同时这些设定值可存储在E2PROM内便于下次调用。系统将模拟电路与数字电路相结合,包括取样放大电路、保护电路以及基于XX的控制电路组成。结合硬件及软件, 实现了激光二极管的可靠保护以及光功率的稳定、准确输出。此外,该电源还具有过流保护、延时软启动,可与PC机通信完成数据自动采集等多种功能,在科研和生产中有很好的应用前景。
关键词:单片机半导体激光器驱动电源
Abstract
Laser diode (LD) is a current injected device whose characteristic and life are
greatly dependent on the performance of LD-used current supply. We designed a digital driving source for LD. The driving source is controlled by MCU. The operation current value and current limit value can be set by key board. The values can be displayed on the LCD screen and be stored in E2PROM so that these can be used next time. The system build up by analog current and digital current, include sampling amplifier current、protection current and based on AT89C52 control current. bining appropriate hardware and software, we have achieved, in our driver, a variety of protection features. Meanwhile, we have also obtained a continuously adjustable optical power output with high accuracy and stability. In addition, it has such functions as limited current protection, soft starting delayed and automatic data acquisition by puter through the serial port and so on. It will be widely used in the fields of scientific research and production.
Key word: MCU laser diode driving source
1前言
半导体激光器具有单色性好、体积小、重量轻、能耗低、工作寿命长等优点,在科研、工业、军事等领域得到了日益广泛的应用。半导体激光器是一种以电流注入作为激励方式的激光器,其运行与驱动电源有很大的关系, 瞬态的电流或电压尖峰等许多因素都很容易损坏激光器, 电流、温度的起伏会引起光功率的变化, 影响输出的准确、稳定。有关驱动电源的问题因素更加受到人们的重视,目前大多都是纯硬件电路系统。事实上,基于微型计算机的数字化控制能够更有效地解决半导体激光器工作的准确、