用于相干反斯托克斯拉曼散射显微光谱的大模场面积光子晶体光纤中的皮秒超连续谱产生

Shen Yujie, Voronin Alexander A, Zheltikov Aleksei M, O'Connor Sean P, Yakovlev Vladislav V, Sokolov Alexei V, Scully Marlan O

Texas A& M University, College Station, TX, 77843, USA.

Russian Quantum Center, ul. Novaya 100, Skolkovo, Moscow Region, 143025, Russia.

Sci Rep. 2018 Jun 22;8(1):9526. doi: 10.1038/s41598-018-27811-5.

We perform a detailed theoretical and experimental investigation of supercontinuum generation in large-mode-area photonic crystal fibers pumped by a high-energy, high-repetition rate picosecond Nd:YVO laser, with the goal of using it as the Stokes beam in coherent anti-Stokes Raman scattering setup. We analyze the influence of fiber structure and length on the supercontinuum power, spectral shape, and group delay dispersion. We identify the experimental conditions for stable supercontinuum generation, with microjoule-level pulse energy and the spectrum extending beyond 1600 nm, which allows excitation of Raman frequencies up to 3000 cm and beyond. We demonstrate reliable and efficient operation of a coherent anti-Stokes Raman spectroscopy and microscopy setup using this supercontinuum source.

我们对由高能量、高重复频率皮秒级钕：钒酸钇激光器泵浦的大模场面积光子晶体光纤中的超连续谱产生进行了详细的理论和实验研究，目的是将其用作相干反斯托克斯拉曼散射装置中的斯托克斯光束。我们分析了光纤结构和长度对超连续谱功率、光谱形状和群时延色散的影响。我们确定产生稳定超连续谱的实验条件，脉冲能量为微焦耳级，光谱延伸超过1600纳米，这使得能够激发高达3000厘米及以上的拉曼频率。我们展示了使用这种超连续谱源的相干反斯托克斯拉曼光谱和显微镜装置的可靠且高效的运行。