本文關(guān)鍵詞： 激光量熱技術(shù) 大口徑光學元件 吸收 激光誘導偏轉(zhuǎn)技術(shù) 定標誤差 熱變形 表面熱透鏡技術(shù) 光熱偏轉(zhuǎn)技術(shù) 靈敏度 構(gòu)型優(yōu)化　出處：《中國科學院研究生院（光電技術(shù)研究所）》2015年博士論文　論文類型：學位論文

【摘要】：激光技術(shù)的不斷發(fā)展對光學元件的性能提出了越來越高的要求。尤其在高功率激光系統(tǒng)中,光學元件的吸收損耗是限制其進一步發(fā)展的一個重要因素。而光學元件吸收損耗的準確測量,對于優(yōu)化鍍膜工藝、降低薄膜吸收損耗具有重要的意義。因此,本文圍繞吸收損耗的高靈敏檢測技術(shù)展開研究工作。針對大口徑光學元件提出了激光量熱法測量其吸收損耗的方法。首先建立了大口徑光學元件的溫升模型,用于分析樣品表面溫升數(shù)據(jù),計算大口徑光學元件的吸收損耗。使用該溫度模型分析了激光量熱法測量大口徑光學元件吸收損耗的測量靈敏度以及溫度探測位置誤差對測量結(jié)果的影響。激光誘導偏轉(zhuǎn)技術(shù)中使用了電阻加熱定標方法實現(xiàn)了光學元件吸收損耗的絕對測量。為分析電阻加熱定標方法的定標誤差,建立了方形平頂激光輻照和電阻加熱激勵下光學樣品溫升的理論模型和有限元模型。理論上分析了激光誘導偏轉(zhuǎn)信號和相應(yīng)定標誤差與探測激光位置的關(guān)系并提出了減小定標誤差的方法。從表面熱透鏡技術(shù)的理論出發(fā),提出了使用短波長探測激光提高表面熱透鏡技術(shù)測量靈敏度的方法并使用三個不同波長的探測激光進行了實驗驗證。理論和實驗結(jié)果表明:最佳探測距離和相應(yīng)的表面熱透鏡信號都與波長成反比。使用紫外激光作為探測光光源可以有效提高表面熱透鏡信號的測量靈敏度。建立了基于菲涅爾衍射理論的光熱偏轉(zhuǎn)信號的精確理論模型,得到了光熱偏轉(zhuǎn)信號的表達式和光熱偏轉(zhuǎn)信號的構(gòu)型優(yōu)化參數(shù)。此外,開展了光熱偏轉(zhuǎn)技術(shù)實驗,分析了探測激光光斑、束腰位置、波長以及探測距離對光熱偏轉(zhuǎn)信號的影響。理論和實驗結(jié)果表明,最優(yōu)探測距離完全依賴于探測激光的束腰位置和探測激光波長,通過優(yōu)化探測激光光斑半徑和探測距離以及使用短波長探測激光可以有效增大光熱偏轉(zhuǎn)技術(shù)的測量靈敏度。
[Abstract]:With the development of laser technology, the performance of optical components is required more and more, especially in high-power laser systems. The absorption loss of optical elements is an important factor limiting its further development. The accurate measurement of absorption loss of optical elements is of great significance for optimizing the coating process and reducing the absorption loss of films. In this paper, the high sensitive measurement of absorption loss is studied. A method of measuring absorption loss by laser calorimetry is proposed for large aperture optical elements. Firstly, the temperature rise model of large aperture optical elements is established. Used to analyze surface temperature rise data of samples. The absorption loss of large aperture optical elements is calculated. The sensitivity of laser calorimetric method for measuring absorption loss of large aperture optical elements and the influence of temperature detection position error on the measurement results are analyzed by using the temperature model. The resistive heating calibration method is used to realize the absolute measurement of absorption loss of optical elements in the induced deflection technique, and the calibration error of the resistive heating calibration method is analyzed. The theoretical model and finite element model of temperature rise of optical samples excited by square flat-top laser irradiation and resistance heating are established. The relationship between laser induced deflection signal and corresponding calibration error and laser position detection is analyzed theoretically. The method of reducing calibration error is given, which is based on the theory of surface thermal lens technology. In this paper, a method of improving the sensitivity of surface thermal lens technique by using short wavelength detection laser is proposed, and the experimental results of three different wavelengths of detection laser are verified. The theoretical and experimental results show that:. The optimum detection distance and the corresponding surface thermal lens signal are inversely proportional to the wavelength. The sensitivity of the surface thermal lens signal can be improved effectively by using the ultraviolet laser as the detecting light source. The Fresnel diffraction theory is established. The exact theoretical model of the photothermal deflection signal based on the. The expression of the photothermal deflection signal and the optimized configuration parameters of the photothermal deflection signal are obtained. In addition, the experiment of photothermal deflection technique is carried out, and the detection of laser spot and the position of beam waist are analyzed. The theoretical and experimental results show that the optimal detection distance is completely dependent on the beam waist position and the detection wavelength of the laser. By optimizing the detection of laser spot radius and detection distance and using short wavelength laser detection, the measurement sensitivity of photothermal deflection technology can be increased effectively.
【學位授予單位】：中國科學院研究生院（光電技術(shù)研究所）
【學位級別】：博士
【學位授予年份】：2015
【分類號】：TN249

【相似文獻】

相關(guān)期刊論文 前10條

1 蔡春平;光纖的光吸收損耗[J];應(yīng)用光學;1994年03期

2 趙勇;孟慶堯;;氫與光纖的物化反應(yīng)對井下永久性測量的影響[J];光電工程;2007年09期

3 姚騰鴻;用VAD方法制造超低OH含量的光纖[J];激光通信;1981年01期

4 王桂芬，馬根源，陳衛(wèi)，，顧立群，張光寅;測量光纖吸收損耗和散射損耗的一種簡單有效方法[J];南開大學學報(自然科學版);1995年04期

5 ;其他[J];中國光學與應(yīng)用光學文摘;2008年02期

6 歸振興;沈俊泉;陳鈺明;奚全新;沈華勤;張順怡;;閉環(huán)橫流CO_2激光器中突變吸收損耗機理的研究[J];激光技術(shù);1992年02期

7 宋擁軍,費雄駿;衛(wèi)星通信大氣吸收損耗的計算方法[J];無線電通信技術(shù);2000年06期

8 趙洪林;童玲玲;王鋼;王磊;;海上微波信道的傳輸特性[J];哈爾濱理工大學學報;2006年02期

9 馬春生,劉式墉;MOS型波導光學特性分析[J];半導體學報;1989年04期

10 趙宏太,柳曉軍,王謹,曹俊文,趙志,詹明生;腔衰蕩法四腔鏡反射率及腔內(nèi)吸收測量[J];激光與光電子學進展;2001年05期

相關(guān)會議論文 前1條

1 宋永香;;鈥激光器0°全反膜的制備與工藝[A];中國光學學會2011年學術(shù)大會摘要集[C];2011年

相關(guān)博士學位論文 前1條

1 張曉榮;光學元件吸收損耗的高靈敏度檢測技術(shù)研究[D];中國科學院研究生院（光電技術(shù)研究所）;2015年

相關(guān)碩士學位論文 前1條

1 李爽;遂道結(jié)吸收損耗及其對新型大功率激光器特性影響的研究[D];北京工業(yè)大學;2000年

本文編號：1454736