摘要
采用光束传输法分析了横向啁啾体布拉格光栅的衍射特性,实验研究了横向啁啾体布拉格光栅外腔二极管激光器的功率特性、光谱特性和波长调谐特性,数值计算和实验结果表明:横向啁啾体布拉格光栅的峰值衍射效率随着入射光束在啁啾方向上尺寸的增大而降低,光谱选择宽度随着入射光束在啁啾方向上尺寸的增大而增大;当横向啁啾体布拉格光栅的啁啾方向与二极管激光器的快轴方向一致时,外腔二极管激光器的外腔效率为85%,在808.05 nm处的输出激光光谱宽度为0.27 nm;当横向啁啾体布拉格光栅的啁啾方向与二极管激光器的慢轴方向一致时,外腔二极管激光器的外腔效率为89%,在808.05 nm处的输出激光光谱宽度为0.3 nm,两种外腔激光器都较好地实现了约15 nm波长调谐范围,且在整个调谐范围内输出功率波动范围分别小于1%(快轴方向一致)与1.5%(慢轴方向一致)。
The diffraction characteristics of transversely chirped volume Bragg grating are analyzed using beam propagation method. The power, spectral and wavelength tuning characteristics of external cavity diode laser analyzed by laser using transversely chirped volume Bragg grating are demonstrated. The theoretical and experimental results indicate that the peak diffraction efficiency of transversely chirped volume Bragg grating decreases with increasing the size of the incident beam in chirped direction, the spectral width increases with increasing the size of the incident beam in chirped direction. When the chirped direction of the transversely chirped volume Bragg grating is consistent with the fast axis direction of diode laser, external cavity efficiency of external cavity diode laser is 85%, the spectral width of the output laser at 808.05 nm is 0.27 nm. When the chirped direction of the transversely chirped volume Bragg grating is consistent with the slow axis direction of diode laser, external cavity efficiency of external cavity diode laser is 89%, the spectral width of the output laser at 808.05 nm is 0.3 nm. Both of the external cavity diode lasers have a better way to achieve about 15 nm wavelength tunable range, and within the entire tuning range, the fluctuation range of output power are less than 1% （consistent with the fast axis direction） and 1.5% （consistent with the slow axis direction） respectively.
出处
《中国激光》
EI
CAS
CSCD
北大核心
2015年第5期288-294,共7页
Chinese Journal of Lasers
关键词
光栅
横向啁啾体布拉格光栅
衍射特性
外腔二极管激光器
波长连续调谐
gratings
transversely volume Bragg gratings
diffraction characteristics
external cavity diode laser
continuous wavelength tuning
