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Tunable light source for coherent anti-Stokes Raman scattering microspectroscopy based on the soliton self-frequency shift

机译:基于孤子自频移的相干抗斯托克斯拉曼散射光谱学可调光源

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摘要

We present a photonic crystal fiber (PCF)-based light source for generating tunable excitation pulses (pump and Stokes) that are applicable to coherent anti-Stokes Raman scattering (CARS) microspectroscopy. The laser employed is an unamplified Ti:sapphire femtosecond laser oscillator. The CARS pump pulse is generated by spectral compression of a laser pulse in a PCF. The Stokes pulse is generated by redshifting a laser pulse in a PCF through the soliton self-frequency shift. This setup allows for probing up to 4000 cm~(-1) with a spectral resolution of approximately 25 cm~(-1). We characterize the stability and robustness of CARS microspectroscopy employing this light source.
机译:我们提出了一种基于光子晶体光纤(PCF)的光源,用于产生可调谐激发脉冲(泵浦和斯托克斯),该脉冲适用于相干抗斯托克斯拉曼散射(CARS)显微光谱。使用的激光器是未经放大的Ti:蓝宝石飞秒激光振荡器。 CARS泵浦脉冲是通过PCF中激光脉冲的光谱压缩产生的。斯托克斯脉冲是通过使孤子自频移使PCF中的激光脉冲红移而生成的。该设置允许以约25 cm〜(-1)的光谱分辨率探测最大4000 cm〜(-1)。我们表征使用此光源的CARS显微术的稳定性和鲁棒性。

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