外腔半導(dǎo)體激光器論文：光柵外腔半導(dǎo)體激光器的輸出特性研究

1、 外腔半導(dǎo)體激光器論文：光柵外腔半導(dǎo)體激光器的輸出特性研究【中文摘要】由于外腔半導(dǎo)體激光器(ECSL)的輸出激光具有窄線寬、可調(diào)諧、頻率穩(wěn)定等突出優(yōu)點(diǎn),因而在高分辨率光譜分析、光纖通信、計(jì)量檢測(cè)、生物醫(yī)學(xué)診斷等領(lǐng)域有著廣泛的應(yīng)用前景。本文以光柵外腔半導(dǎo)體激光器為研究對(duì)象,首先介紹了外腔半導(dǎo)體激光器的發(fā)展?fàn)顩r和應(yīng)用前景。然后在對(duì)半導(dǎo)體激光器和閃耀光柵全面分析的基礎(chǔ)上,從強(qiáng)反饋條件下外腔半導(dǎo)體激光器的速率方程出發(fā),對(duì)外腔半導(dǎo)體激光器的振蕩特性、選模、功率輸出、線寬壓窄和波長(zhǎng)調(diào)諧特性進(jìn)行了分析,并利用Matlab軟件和Origin軟件對(duì)影響Littrow型光柵外腔半導(dǎo)體激光器輸出功率和線寬壓窄的各種

2、因素進(jìn)行了數(shù)值模擬分析。在理論分析和數(shù)值仿真的基礎(chǔ)上,研制了單縱模高質(zhì)量激光輸出的光柵外腔半導(dǎo)體激光器,連續(xù)輸出功率達(dá)到180mW(工作電流為400mA),閾值電流由原來(lái)的165mA降至118mA。最后用各種方法對(duì)實(shí)驗(yàn)搭建的光柵外腔半導(dǎo)體激光器的輸出特性進(jìn)行了測(cè)試。并重點(diǎn)介紹了線寬的測(cè)量方法,最終使用零拍法測(cè)得激光器的光譜線寬為20KHz,激光器可以連續(xù)輸出工作穩(wěn)定度的激光?！居⑽恼緿ue to the excellent characteristics of narrow line-width, tunable, frequency stability etc. the external

3、-cavity semiconductor lasers (ECSL) have been widely used in the fields of high-resolution spectrum analysis, optical fiber communication, measuring and testing biomedical medicine etc.In this thesis. the grating external-cavity semiconductor lasers are made as the research objects. First, the devel

4、opment and the applications of the external-cavity semiconductor lasers are introduced. Then, based on the comprehensive analysis of semiconductor lasers and blazed grating, and started from the rate equation of the external cavity under the condition of a strong feedback. the oscillations of the gr

5、ating external-cavity semiconductor lasers are analyzed. At the same time. the characteristics of mode selection, power output, line-width reduction and wavelength tuning are studied. In addition, different factors which are influenced by the output power and line-width reduction of the Littrow exte

6、rnal-cavity semiconductor lasers have been numerical simulated with Matlab software and Origin software. Moreover, based on the theoretical analysis and numerical simulation, the grating external-cavity semiconductor laser which has single longitudinal mode and highly-equality laser output is develo

7、ped. When the continual output power reach 180mW at working current with 400mA, the threshold current will decline from 165mA to 118mA. Finally, the Output Characteristics of grating external-cavity semiconductor lasers are measured with all kinds of methods. At the same time, the line width measure

8、ment methods are emphasized in this thesis. When we use homodyne method, the spectral line-width of ECSL is 20 KHz. Therefore, Lasers which have working stability can be continuously exported.【關(guān)鍵詞】外腔半導(dǎo)體激光器 閃耀光柵 輸出功率 線寬壓窄 數(shù)值模擬【英文關(guān)鍵詞】External-cavity diode laser blazed grating Output power Line-width r

9、eduction Numerical simulation【目錄】光柵外腔半導(dǎo)體激光器的輸出特性研究摘要4-5ABSTRACT5第一章 緒論8-121.1 引言81.2 外腔半導(dǎo)體激光器的發(fā)展和研究現(xiàn)狀8-91.3 外腔半導(dǎo)體激光器的應(yīng)用9-111.3.1 相干光通信系統(tǒng)9-101.3.2 光纖通信波分復(fù)用技術(shù)101.3.3 干涉測(cè)量技術(shù)10-111.4 課題的主要工作和內(nèi)容安排11-12第二章 基礎(chǔ)知識(shí)12-272.1 半導(dǎo)體激光器12-222.1.1 半導(dǎo)體激光器簡(jiǎn)介12-142.1.2 半導(dǎo)體激光器性能分析14-182.1.3 半導(dǎo)體激光器的模式振蕩理論18-222.2 閃耀光柵22-2

10、62.2.1 閃耀光柵原理22-242.2.2 閃耀光柵的衍射效率24-262.3 光柵外腔半導(dǎo)體激光器262.4 本章小結(jié)26-27第三章 外腔半導(dǎo)體激光器性能分析及數(shù)值模擬27-393.1 外腔半導(dǎo)體激光器的振蕩特性27-293.1.1 速率方程27-283.1.2 外腔作用下的穩(wěn)態(tài)振蕩條件28-293.2 選模29-303.3 功率輸出30-323.4 線寬壓窄32-353.5 外腔半導(dǎo)體激光器的波長(zhǎng)調(diào)諧35-383.5.1 溫度調(diào)諧特性35-363.5.2 電流調(diào)諧特性363.5.3 機(jī)械調(diào)諧特性36-383.6 本章小結(jié)38-39第四章 光柵外腔半導(dǎo)體激光器的實(shí)驗(yàn)研究39-444.1

11、 器件選擇39-404.1.1 激光二極管394.1.2 準(zhǔn)直透鏡39-404.1.3 光柵404.2 光柵外腔半導(dǎo)體激光器的機(jī)械結(jié)構(gòu)40-414.3 外腔半導(dǎo)體激光器的驅(qū)動(dòng)電路和溫控電路41-424.3.1 外腔半導(dǎo)體激光器驅(qū)動(dòng)電路414.3.2 外腔半導(dǎo)體激光器溫控電路41-424.4 實(shí)驗(yàn)調(diào)節(jié)42-434.4.1 光路準(zhǔn)直424.4.2 調(diào)節(jié)光柵及二次調(diào)節(jié)準(zhǔn)直42-434.5 本章小結(jié)43-44第五章 光柵外腔半導(dǎo)體激光器的輸出特性測(cè)量44-535.1 激光器輸出特性測(cè)量系統(tǒng)44-455.1.1 測(cè)量系統(tǒng)的組成445.1.2 測(cè)量中所用到的儀器及精度44-455.2 外腔半導(dǎo)體激光器的功率特性455.2.1 外腔半導(dǎo)體激光器的閡值特性455.2.2 外腔半導(dǎo)體激光器的功率穩(wěn)定性455.3 外腔半導(dǎo)體激光器的波長(zhǎng)特性45-475.3.1 中