本文選題：多次激光自混合干涉 + 絕對距離測量��； 參考：《東北石油大學(xué)》2017年碩士論文

【摘要】：激光自混合干涉測量技術(shù),是利用外界反饋光對激光器輸出特性的影響而形成的一種新型光學(xué)精密測量技術(shù)。隨著現(xiàn)代光電子技術(shù)、光纖通信技術(shù)以及傳統(tǒng)干涉技術(shù)的快速發(fā)展,激光自混合干涉技術(shù)被廣泛應(yīng)用于距離、形貌、位移、振動等不同參數(shù)的測量。隨著航空航天和船舶工業(yè)的發(fā)展,絕對距離的測量一直受到廣泛關(guān)注,對高精度絕對距離的測量提出了實(shí)際的需求。本文從激光自混合干涉原理出發(fā),重點(diǎn)研究了激光測距的原理及線性調(diào)頻的方法,深入分析了多次反饋激光自混合干涉的形成機(jī)理,從原理結(jié)構(gòu)上提出了一種利用二次反饋激光自混合測距的方法。有效的解決了在傳統(tǒng)測距方法中測量精度和硬件設(shè)計(jì)之間的矛盾。在不增加光學(xué)信號處理電路的復(fù)雜度以及成本的基礎(chǔ)上利用光程加倍,實(shí)現(xiàn)了步長分辨率精度的提高,進(jìn)而實(shí)現(xiàn)測量精度的提升。主要研究內(nèi)容包括:首先,基于三鏡腔等效模型和Lang—Kobayashi速率方程,建立激光自混合干涉理論的分析模型。在此基礎(chǔ)上提出多次反饋激光自混合干涉理論,得出多重反饋激光自混合干涉光波與外腔光波波動的關(guān)系。其次,介紹了激光自混合干涉絕對距離測量的原理,對常用激光自混合測距的方法進(jìn)行了對比分析。在此基礎(chǔ)上,提出了二次反饋激光自混合測距的方法,從激光器出射光強(qiáng)出發(fā),推導(dǎo)出基于二次反饋激光自混合絕對測距的測量方程。然后,設(shè)計(jì)和搭建了多次反饋激光自混合干涉的測距實(shí)驗(yàn)平臺,主要包括激光器的選取、激光器精密電流源與溫度控制器的使用、以及數(shù)據(jù)采集處理等。最后,基于搭建的實(shí)驗(yàn)平臺,對提出的方法進(jìn)行了可行性分析。
[Abstract]:Laser self-mixing interferometry is a new type of optical precision measurement technology, which is formed by the influence of external feedback light on the output characteristics of the laser. With the rapid development of modern optoelectronic technology, optical fiber communication technology and traditional interference technology, laser self-mixing interferometry is widely used in the measurement of distance, morphology, displacement, vibration and other parameters. With the development of aerospace and shipbuilding industry, the measurement of absolute distance has been paid more and more attention. Based on the principle of laser self-mixing interferometry, the principle of laser ranging and the method of linear frequency modulation are studied in this paper, and the formation mechanism of multi-feedback laser self-mixing interference is deeply analyzed. In this paper, a method of self-mixing ranging with secondary feedback laser is proposed from the principle structure. The contradiction between measurement precision and hardware design in traditional ranging method is solved effectively. On the basis of using optical path doubling without increasing the complexity and cost of optical signal processing circuit, the resolution accuracy of step size is improved and the measurement accuracy is improved. The main contents are as follows: firstly, based on the three-mirror cavity equivalent model and Lang-Kobayashi rate equation, an analytical model of laser self-mixing interference theory is established. On this basis, the theory of multiple feedback laser self-mixing interference is put forward, and the relation between multi-feedback laser self-mixing interference light wave and external cavity light wave is obtained. Secondly, the principle of absolute distance measurement by laser self-mixing interferometry is introduced, and the methods of laser self-mixing range measurement are compared and analyzed. On this basis, a method of self-mixing laser self-mixing ranging with secondary feedback is proposed. The measurement equation of self-mixing absolute distance measurement based on secondary feedback laser is derived from the light intensity of the laser. Then, the experimental platform of multiple feedback laser self-mixing interferometry is designed and built, including the selection of laser, the use of laser precise current source and temperature controller, and the data acquisition and processing. Finally, based on the experimental platform, the feasibility of the proposed method is analyzed.
【學(xué)位授予單位】：東北石油大學(xué)
【學(xué)位級別】：碩士
【學(xué)位授予年份】：2017
【分類號】：TN24

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