Composite wavelength tuning is proposed and demonstrated in a soliton self-frequency shift (SSFS)-based coherent anti-Stokes Raman scattering (CARS) system in order to realize a fast and precision measurement of the Raman spectrum. The Stokes wavelength can be continuously tuned over 300 nm, corresponding to a molecular vibrational range of approximately 3600 cm −1 . The CARS three-dimensional spectrogram of cyclohexane around 2900 cm −1 has been measured and the corresponding Raman spectrum was recovered with 25 cm −1 spectral resolution. The composite wavelength tuning method strikes a balance between wavelength scanning speed and tuning precision during the measurement of the Raman spectrum in the SSFS-based CARS system, which can effectively solve the larger wavelength tuning step problem caused by the min-repeatable optical power adjustment.

中文翻译：

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基于孤子自频移相干反斯托克斯拉曼散射的精确拉曼共振复合波长调谐

提出并在基于孤子自频移（SSFS）的相干反斯托克斯拉曼散射（CARS）系统中进行了复合波长调谐，以实现对拉曼光谱的快速精确测量。斯托克斯波长可以在300 nm范围内连续调谐，对应于大约3600 cm -1的分子振动范围。已测量了约2900 cm -1的环己烷的CARS三维光谱图，并以25 cm -1的光谱分辨率回收了相应的拉曼光谱。在基于SSFS的CARS系统中拉曼光谱的测量过程中，复合波长调谐方法在波长扫描速度和调谐精度之间取得了平衡，可以有效解决由最小可重复光功率调整引起的更大的波长调谐步骤问题。