本文選題：光纖激光器 + 單縱模　； 參考：《華北電力大學(xué)》2017年碩士論文

【摘要】：光纖激光器作為第三代激光器的代表,具有體積小、重量輕、功率高、噪聲低、等優(yōu)良特性,但是,隨著科學(xué)的發(fā)展,許多領(lǐng)域比如長距離分布式溫度、應(yīng)變等傳感、光通信、頻率鎖定等都對光纖激光器有了更高的要求,而單縱模光纖激光器因其超窄帶寬的激光輸出,較高的輸出功率逐漸受到科研工作者的重視。本文基于上述背景設(shè)計(jì)了一種新型單縱模摻鉺光纖激光器,利用雙環(huán)型腔與作為飽和吸收體的未泵浦光纖相結(jié)合的方式來進(jìn)行激光縱模的選擇。在分析光纖激光器的構(gòu)成、原理的基礎(chǔ)上,利用光學(xué)仿真軟件Optisystem對該激光器進(jìn)行仿真研究。其次,搭建了單縱模摻鉺光纖激光器系統(tǒng),并進(jìn)行了輸出功率、閾值等參數(shù)的測量。最后,利用光纖激光器的傳感特性,提出并設(shè)計(jì)了基于單縱模光纖激光器變壓器繞組監(jiān)測系統(tǒng)。本文主要做了以下幾個(gè)方面的研究工作:分析了摻鉺光纖激光器的工作原理;在仿真軟件上搭建新型結(jié)構(gòu)激光器系統(tǒng),研究了多環(huán)形腔,飽和吸收體對于激光輸出功率、閾值等參數(shù)的影響。并從飽和吸收體長度,耦合器耦合比等方面對激光器進(jìn)行參數(shù)優(yōu)化;利用仿真得到的各類數(shù)據(jù),搭建單縱模光纖激光器實(shí)驗(yàn)系統(tǒng),實(shí)現(xiàn)激光的輸出,測量了輸出激光的功率、閾值等參數(shù)并與仿真數(shù)值進(jìn)行了比較分析;基于光纖激光器高靈敏度的傳感特性,提出了將新型結(jié)構(gòu)的單縱模摻鉺光纖激光器應(yīng)用于變壓器繞組溫度監(jiān)測,并從變壓器繞組溫度監(jiān)測原理、光纖激光器傳感特性等方面驗(yàn)證了該方法的可行性,最后設(shè)計(jì)了基于單縱模光纖激光器的繞組溫度監(jiān)測系統(tǒng)。
[Abstract]:Fiber laser, as the representative of the third generation laser, has the advantages of small volume, light weight, high power, low noise, and so on. However, with the development of science, many fields such as long-distance distributed temperature, strain sensor, optical communication, etc. Frequency locking has higher requirements for fiber lasers, while single-longitudinal-mode fiber lasers have attracted more and more attention because of their ultra-narrow bandwidth output and high output power. Based on the above background, a novel single-longitudinal mode erbium-doped fiber laser is designed in this paper. The dual ring cavity is combined with the unpumped fiber as a saturated absorber to select the longitudinal mode of the laser. On the basis of analyzing the constitution and principle of fiber laser, the simulation research of the laser is carried out by using the optical simulation software Optisystem. Secondly, a single longitudinal mode erbium-doped fiber laser system is built, and the output power, threshold and other parameters are measured. Finally, based on the sensing characteristics of fiber laser, a transformer winding monitoring system based on single longitudinal mode fiber laser is proposed and designed. The main work of this paper is as follows: the working principle of erbium-doped fiber laser is analyzed, a new structure laser system is built on the simulation software, and the output power of multi-ring cavity and saturated absorber for laser is studied. The effect of threshold and other parameters. The parameters of the laser are optimized from the aspects of saturated absorber length, coupler coupling ratio and so on. The experiment system of single-longitudinal mode fiber laser is built by using all kinds of simulation data, the output of the laser is realized, and the output power of the laser is measured. Based on the high sensitivity sensing characteristics of fiber laser, a novel single longitudinal mode erbium-doped fiber laser is proposed for transformer winding temperature monitoring. The feasibility of the method is verified from the principle of transformer winding temperature monitoring and the sensing characteristics of fiber laser. Finally, a single longitudinal mode fiber laser based winding temperature monitoring system is designed.
【學(xué)位授予單位】：華北電力大學(xué)
【學(xué)位級別】：碩士
【學(xué)位授予年份】：2017
【分類號】：TN248

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