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题名	全光纤多程相位调制啁啾脉冲激光器技术研究
作者	郭跃
学位类别	硕士
答辩日期	2014
授予单位	中国科学院上海光学精密机械研究所
导师	范薇
关键词	前端 相位调制 光谱控制 啁啾脉冲种子源
其他题名	Research of All-fiber multi-pass phase modulated chirped pulse laser
中文摘要	高功率激光装置要求前端系统具有多档脉冲输出能力，且具备灵活的光谱控制、时间脉冲波形控制、偏振控制以及精确的多档脉冲同步控制等能力。本文开展了多程相位调制技术的研究，力求实现利用同一种子源实现多档脉冲的输出并进行灵活的光谱控制的可行性验证。本论文主要研究成果为： 1. 建立了多程相位调制理论模型，并分析了调制次数、调制深度、同步精度、调制信号形状等物理参数对光谱展宽性能的影响，为后续实验的展开奠定了理论基础。 2. 提出了基于光纤再生放大器结构的多程相位调制光谱展宽的实验方案，并对种子光源，环形腔结构，同步控制模块，调制信号产生模块，调制结果测量模块等关键单元模块进行了分析与设计。 3. 搭建了多程位相调制展宽实验平台，进行了多程位相调制展宽的实验验证，结果表明，通过多程位相调制，可将输入为0.129nm的激光，展宽到0.199nm，并分析了信号光与调制信号之间的同步精度是影响调制效果的关键因素。 4. 利用多程位相调制可实现精确的光谱控制，开展了激光在传输过程中由于自相位调制而形成的光谱展宽的补偿，结果表明，对光谱宽度为0.129nm的光谱可通过多程位相调制手段补偿到0.044nm，该实验结果为前端系统下一步的光谱灵活控制及系统内自相位调制的有效补偿提供了重要的技术途径。 5. 针对实验过程中存在的问题，提出利用任意脉冲发生器实现调制信号的灵活控制以及低半波电压相位调制器的使用将有效提升多程相位调制技术对光谱控制能力的灵活度。
英文摘要	The high power laser system requires the front end to provide several kinds of seed pulses, with the ability to control the spectrum, temporal waveform, polarization and high-precision synchronization between different seed pulses flexibly and easily. This thesis carried out the research of multi-pass phase modulation, to realize the output of the required seed pulses by the same seed pulse resource. The feasibility of flexible control of the pulse spectrum is validated. The main research achievements of this thesis are showed as follow: 1. We established a theoretical model of the multi-pass phase modulation to analyze the influence of the modulation times, modulation depth, and the requirement on the synchronization precision, modulation signal shape and other practical parameters on the spectrum stretched outputs, and the simulated results provided theoretical guidance for the experiment. 2. The experimental scheme of multi-pass phase modulation based on fiber regenerative amplifier is proposed. The key units of the multi-pass phase modulation have been analyzed and designed, which include seed pulse, loop structure, synchronous control, modulation signal generator, modulation results measurement. 3. We set up the experimental facility and carried out the multi-pass phase modulation experiments the result shows that after the modulation, the input pulse with 0.129nm spectrum width is stretched to 0.199nm. the analysis showed that the synchronization jitter between the light pulse and the modulation signal is the main factor limits the modulation result. 4. By the multi-pass phase modulation the precise control of the spectrum can be realized. And the experiment to compensate the stretched spectrum caused by the self-phase modulation when transmitting in the medium is carried out. The result showed that the pulse with a spectrum width 0.129nm is compensated to 0.044nm by multi-pass phase modulation, which provides an important method for the spectrum control and nonlinear phase shift compensation. 5. To solve some practical problems, the schemes including the application of low half-wave voltage phase modulator and arbitrary waveform generator which will effectively promote the performance of the modulation system and the dexterity of the spectrum control.
语种	中文
内容类型	学位论文
源URL	[http://ir.siom.ac.cn/handle/181231/16855]
专题	上海光学精密机械研究所_学位论文
推荐引用方式 GB/T 7714	郭跃. 全光纤多程相位调制啁啾脉冲激光器技术研究[D]. 中国科学院上海光学精密机械研究所. 2014.

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