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  本文選題：LD + 泵浦��； 參考：《長春理工大學》2015年碩士論文

【摘要】：多波長激光器不僅在煙霧探測、化學藥品檢測等領域得到廣泛的應用,而且在非線性光學混頻方面也有著重要的意義。傳統獲得多波長激光的方法是利用同一增益介質的不同能級躍遷獲得,但是躍遷譜線之間存在著非常激烈的增益競爭,影響了多波長激光輸出的穩(wěn)定性。為了探討在有效避免增益競爭的前提下實現多波長激光輸出的相關理論,本論文開展了腔內泵浦自拉曼三波長連續(xù)激光器機理研究。具體開展的研究內容如下:1.分析了準三能級激光、四能級激光及拉曼光的基本原理,并分別推導出了三種波長激光在連續(xù)運轉條件下的速率方程組;2.推導出了四能級激光及其拉曼光雙波長激光同時輸出的數學模型。在此基礎上,給出了能夠實現準三能級激光、四能級激光及拉曼光同時輸出的腔內泵浦自拉曼三波長激光器的結構方案,并基于此建立起了用于描述三波長連續(xù)激光器行為特性的數學模型;3.基于所建立的數學模型進行了數值模擬,首先得到了四能級激光自拉曼雙波長激光器在不同條件下的輸出特性,在此基礎上,開展了腔內泵浦自拉曼三波長連續(xù)激光器的輸出特性研究,并詳細的闡述和分析了每一種輸出特性所對應的內在機理。
[Abstract]:Multi-wavelength lasers are not only widely used in smoke detection, chemical detection and other fields, but also have important significance in nonlinear optical mixing. The traditional method of obtaining multi-wavelength laser is to use the different energy levels of the same gain medium to obtain it. However, there is a very fierce gain competition between the transition lines, which affects the stability of the multi-wavelength laser output. In order to study the theory of multi-wavelength laser output without gain competition effectively, the mechanism of intracavity pumped self-Raman three-wavelength CW laser is studied in this paper. The specific contents of the study are as follows: 1. The basic principles of quasi three level laser, four level laser and Raman light are analyzed, and the rate equations of three kinds of wavelength laser under the condition of continuous operation are derived respectively. A mathematical model for simultaneous output of a four-level laser and a two-wavelength Raman laser is derived. On the basis of this, the structure scheme of intracavity pumped self-pumped three-wavelength Raman laser, which can realize the simultaneous output of quasi-three-level laser, four-level laser and Raman light, is presented. Based on this, a mathematical model for describing the behavior of three-wavelength CW lasers is established. Based on the established mathematical model, the output characteristics of a four-level laser self-Raman dual-wavelength laser under different conditions are obtained. The output characteristics of intracavity pumped self-Raman three-wavelength CW laser are studied, and the internal mechanism of each output characteristic is described and analyzed in detail.
【學位授予單位】：長春理工大學
【學位級別】：碩士
【學位授予年份】：2015
【分類號】：TN248

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本文編號：1916375