【摘要】：在光輻射計(jì)量領(lǐng)域中,低溫絕對(duì)輻射計(jì)采用了電替代、超低溫、超電導(dǎo)和雙層冷屏蔽等先進(jìn)技術(shù)方法,使得光輻射計(jì)量的精度得到了大幅的提高。為了能夠最大限度的發(fā)揮低溫絕對(duì)輻射計(jì)的技術(shù)優(yōu)勢(shì),要求其配備的激光光源能夠輸出功率高穩(wěn)定度的激光信號(hào),而常見的激光器由于受到電源注入電流、工作溫度、模式跳變以及增益系數(shù)等因素的影響,使得其輸出激光信號(hào)的功率波動(dòng)通常不小于1%,為了滿足這一實(shí)際應(yīng)用需求,需要研制一套激光功率穩(wěn)定控制系統(tǒng),使其能夠輸出功率更加穩(wěn)定的激光信號(hào)。基于這一應(yīng)用背景,本文設(shè)計(jì)了一套基于聲光調(diào)制的激光功率穩(wěn)定控制系統(tǒng),并通過搭建實(shí)際系統(tǒng)完成了系統(tǒng)功能驗(yàn)證的工作。本文在對(duì)國(guó)內(nèi)外有關(guān)激光器輸出功率穩(wěn)定控制技術(shù)的研究基礎(chǔ)上,說明了目前相關(guān)技術(shù)手段的優(yōu)勢(shì)及其限制,然后簡(jiǎn)要介紹了激光器的發(fā)展,并對(duì)激光器的分類做了解釋說明。在對(duì)氦氖激光器和半導(dǎo)體激光器的輸出功率波動(dòng)的原因分析后,引出了各類功率穩(wěn)定控制技術(shù),重點(diǎn)介紹了以聲光調(diào)制為代表的外調(diào)制技術(shù)。由于外調(diào)制可以實(shí)現(xiàn)高穩(wěn)定度的激光功率控制,因此本文采用聲光調(diào)制的方式來穩(wěn)定激光功率,設(shè)計(jì)的激光功率穩(wěn)定控制系統(tǒng)主要由光路控制模塊、光電放大模塊以及反饋控制器組成。其中反饋控制器使用FPGA作為主控芯片,配合使用PID算法,完成對(duì)激光功率控制的功能。根據(jù)設(shè)計(jì)方案搭建了系統(tǒng)并詳細(xì)分析了在不同實(shí)驗(yàn)條件下得到的實(shí)驗(yàn)數(shù)據(jù),通過實(shí)驗(yàn)數(shù)據(jù)分析證明了本功率穩(wěn)定系統(tǒng)可以適用于不同波長(zhǎng)激光器的激光功率控制,能夠長(zhǎng)時(shí)間穩(wěn)定工作。多次重新搭建系統(tǒng)在紅外及紫外波段均得到了輸出激光功率穩(wěn)定度優(yōu)于0.05%/h的控制效果,使用本功率穩(wěn)定控制系統(tǒng)后輸出的激光可以作為低溫絕對(duì)輻射計(jì)等精密測(cè)量系統(tǒng)的穩(wěn)定光源。
[Abstract]:In the field of optical radiation measurement, the precision of optical radiation measurement has been greatly improved by using advanced techniques such as electric substitution, ultra-low temperature, super conductivity and double layer cold shielding. In order to maximize the technical advantages of the cryogenic absolute radiometer, it is required that the laser light source be equipped with a laser source capable of outputting laser signals of high power stability, while common lasers are subjected to power injection current and work temperature. The power fluctuation of the output laser signal is usually not less than 1 because of the influence of the mode jump and gain coefficient. In order to meet this practical application demand, a set of laser power stability control system should be developed. Enable it to output more stable laser signals. Based on this application background, a laser power stability control system based on acousto-optic modulation is designed, and the system function verification is completed by building an actual system. On the basis of the research on laser output power stability control technology at home and abroad, this paper explains the advantages and limitations of the current related techniques, and then briefly introduces the development of lasers, and explains the classification of lasers. After analyzing the reason of the output power fluctuation of He-Ne laser and semiconductor laser, various kinds of power stability control techniques are introduced, especially the external modulation technology represented by acousto-optic modulation. Since external modulation can achieve high stability of laser power control, this paper uses acousto-optic modulation to stabilize laser power. The designed laser power stability control system is mainly controlled by optical path module. Photoelectric amplifier module and feedback controller. The feedback controller uses FPGA as the main control chip and PID algorithm to complete the laser power control function. According to the design scheme, the system is set up and the experimental data obtained under different experimental conditions are analyzed in detail. It is proved that the power stability system can be applied to laser power control of different wavelength lasers. Able to work steadily for a long time. The stability of output laser power is better than 0.05 / h in infrared and ultraviolet band. The laser output from this power stability control system can be used as a stable light source for precision measurement systems such as cryogenic absolute radiometers.
【學(xué)位授予單位】：西安電子科技大學(xué)
【學(xué)位級(jí)別】：碩士
【學(xué)位授予年份】：2015
【分類號(hào)】：TN248;TP273

【參考文獻(xiàn)】

相關(guān)期刊論文 前10條

1 熊家秦;熊銳;吳堅(jiān);陳東興;李鑫;;增量式PID怠速控制策略在發(fā)動(dòng)機(jī)上的應(yīng)用[J];廣東工業(yè)大學(xué)學(xué)報(bào);2013年03期

2 陳妍;;基于MAX1968的激光光源設(shè)計(jì)[J];數(shù)字技術(shù)與應(yīng)用;2012年02期

3 王輝林;陳志敏;馬瑞亭;蔡開云;;基于聲光效應(yīng)的激光束偏轉(zhuǎn)控制方法研究[J];壓電與聲光;2010年06期

4 李志行;張軍;;氣體激光器與激光混合氣體[J];低溫與特氣;2009年05期

5 李雙;王驥;陳風(fēng);張磊;吳浩宇;鄭小兵;;基于低溫輻射計(jì)的InGaAs陷阱探測(cè)器高精度光輻射定標(biāo)研究[J];光學(xué)技術(shù);2006年S1期

6 曹丁象,賀少勃,鄭萬國(guó),隋展,陳遠(yuǎn)斌,譚吉春;摻釹無機(jī)液體激光器的研究進(jìn)展[J];激光與光電子學(xué)進(jìn)展;2005年08期

7 林彥,霍玉晶,何淑芳,陳佳琦;光電反饋法穩(wěn)定全固態(tài)綠光激光器輸出功率[J];激光與紅外;2005年01期

8 楊照金,王雷;激光功率和能量計(jì)量技術(shù)的現(xiàn)狀與展望[J];應(yīng)用光學(xué);2004年03期

9 宋貴才,全薇,寧國(guó)斌,金光勇,梁柱,閆曉媛;毫秒激光器高頻電光調(diào)Q技術(shù)[J];半導(dǎo)體光電;2003年05期

10 姚和軍,呂正,李在清;高精度激光束功率穩(wěn)定器的研究[J];計(jì)量學(xué)報(bào);2000年03期

相關(guān)博士學(xué)位論文 前1條

1 蕭鵬;紅外目標(biāo)模擬器輻照度測(cè)量技術(shù)研究[D];哈爾濱工業(yè)大學(xué);2007年

相關(guān)碩士學(xué)位論文 前4條

1 周亞梅;拉曼納斯聲光衍射及測(cè)量系統(tǒng)的研究[D];廣東工業(yè)大學(xué);2013年

2 宋照華;半導(dǎo)體激光器的研究與設(shè)計(jì)[D];中國(guó)地質(zhì)大學(xué)（北京）;2010年

3 王亞雄;聲光互作用特性研究[D];陜西師范大學(xué);2006年

4 郭俊平;兩類新型大功率氦氖激光器的研究[D];四川大學(xué);2004年

，

本文編號(hào)：2396950