激光器驅(qū)動與控制電路設(shè)計

論文編號:DQ280   論文字數(shù):16694,頁數(shù):31

激光器驅(qū)動與控制電路設(shè)計
摘    要

 目前，半導體激光器以其轉(zhuǎn)換效率高、體積小，質(zhì)量輕，可靠性高，能直接調(diào)制以及能與其他半導體器件集成等優(yōu)勢近年來發(fā)展一直很迅猛，已經(jīng)廣泛應用于通信、光學數(shù)據(jù)存儲、固體激光器泵浦、材料加工精密測量、生物醫(yī)療等領(lǐng)域。本次設(shè)計任務(wù)要求設(shè)計一款電路系統(tǒng)來完成激光器的驅(qū)動、控制、溫度監(jiān)控，最終實現(xiàn)讓激光器輸出穩(wěn)定的光功率，并且功率可以在0-8W內(nèi)調(diào)節(jié)。本次設(shè)計的硬件部分是采用單片機對溫度測溫模塊檢測、監(jiān)控，利用單片機完成人機交互，通過單片機控制激光器電源。軟件設(shè)計部分有A\D、D\A硬件控制，包括對數(shù)碼管、按鍵等驅(qū)動，同時進行功率采集，并采用PID算法保證快速穩(wěn)定響應輸入功率。此次論文包括了激光器原理介紹，控制器原理介紹，電源測試數(shù)據(jù)，溫度模塊測試數(shù)據(jù)，激光器功率測試數(shù)據(jù)，以及原理圖設(shè)計，PCB設(shè)計。
關(guān)鍵詞：半導體激光器 單片機  TEC  PID
The system of laser driver and controller
ABSTRACT

    At present, semiconductor laser，relies on its high conversion efficiency, small volume, light quality, high reliability and on being directly modulated and integrated with other semiconductor devices， has developed rapidly. And it has been widely used in communication, optical data storage, solid laser pumps, material processing precision measurement, biological and medical treatment, etc. This design requires a circuit system designed to complete the driver and control of laser, temperature control, and finally achieve the stability of output power to laser light, and can adjust powers that ranged from zero to eight watt. The design of the hardware is to control the power supply of laser by the Single Chip Micyoco check and monitor the module of measuring temperature, and by the module of Single Chip Micyoco control man-machine interactive interface. And the software involves AD, DA hardware control, including the drives of nixietube, keystokes and so on. To guarantee the response power input are stable and rapid, for instance, the control of laser power supply, the collection of software power and comparing with the input power(Stabilify power with PID algorithm).
This paper includes the test datas of power, TEC temperature module and optical maser power, and the elementary diagram, PCB appendix.
Key words：Semiconductor lasers   SCM   TEC   PID

目    錄
 1引言……………………………………………………………………5
 1.1半導體激光器的應用與發(fā)展………………………………………5
 1.2設(shè)計任務(wù)與目標……………………………………………………5
 2激光器…………………………………………………………………7
 2.1激光器結(jié)構(gòu)…………………………………………………………7
 2.2激光器使用注意事項………………………………………………9
 2.3激光器應用…………………………………………………………10
 3電路控制………………………………………………………………11
 3.1控制電路總體結(jié)構(gòu)…………………………………………………11
 3.1.1電路組成部分……………………………………………………11
 3.1.2工作過程及關(guān)鍵問題……………………………………………12
 3.2溫度控制……………………………………………………………12
 3.2.1溫度控制簡介……………………………………………………12
 3.2.2溫度控制原理……………………………………………………13
 3.3功率穩(wěn)定原理………………………………………………………15
 3.3.1功率穩(wěn)定PID算法………………………………………………15
 3.3.2功率穩(wěn)定電路實現(xiàn)………………………………………………18
 3.4人機交互……………………………………………………………18
 3.4.1數(shù)碼管……………………………………………………………18
 3.4.2按鍵與指示燈……………………………………………………19
 3.5軟件實現(xiàn)方案 ……………………………………………………19
 3.5.1 總體工作流程圖………………………………………………19
 3.5.2 關(guān)鍵問題分析…………………………………………………21
 4 驅(qū)動電源……………………………………………………………22
 4.1 電源原理…………………………………………………………22
 4.2 電源控制…………………………………………………………22
 4.3 保護措施…………………………………………………………23
 5 實驗數(shù)據(jù)與結(jié)論……………………………………………………25
 5.1 溫度控制數(shù)據(jù)……………………………………………………25
 5.2 電源輸出測試……………………………………………………26
 6 參考文獻……………………………………………………………28
 附錄……………………………………………………………………29
   謝辭  …………………………………………………………………31