摘要
利用波导相位调制器产生的正弦调频脉冲进行了光谱色散平滑技术实验研究.结果表明该铌酸锂波导相位调制器可以容易地将DFB振荡器产生的单纵模信号展宽到0.1—1.5nm,远场分析表明焦斑扫动规律与理论计算一致,近场分析表明SSD对近场百微米尺度的调制有显著改善.本研究为高功率激光装置束匀滑方案的优化提供了参考.
Precise physical experiments place strict requirements on target illumination uniformity in inertial confinement fusion. Currently,the main stream of beam smoothing technology adopted in solid-state laser driver is smoothing by spectral dispersion （SSD）. The SSD based on wave-guide phase modulator is experimentally studied here. The experimental results indicate that this phase modulator can easily broaden the narrow-band light generated from a DFB laser to 0. 1 nm to 1. 5 nm bandwidth. The far-field analysis indicates the experimental results are in good accordance with the simulation results. In the meantime, nearfield modulation around 100 μm after the dispersion grating could be smoothed significantly. The research lays experimental basis for the optimization of beam smoothing in high-power laser facility.
出处
《物理学报》
SCIE
EI
CAS
CSCD
北大核心
2010年第9期6290-6298,共9页
Acta Physica Sinica
基金
国家自然科学基金(批准号:60878058)资助的课题~~
关键词
远场
近场
光谱色散平滑
惯性约束聚变
far field
near field
smoothing by spectral dispersion
inertial confinement fusion
