A compact laser platform for nonlinear Raman microspectroscopy: multimodality through broad chirp tunability

作者：Lanin A A; Stepanov E A; Tikhonov R A; Sidorov Biryukov D A; Fedotov A B; Zheltikov A M^*

来源：Journal of Raman Spectroscopy, 2016, 47(9): 1042-1048.

DOI：10.1002/jrs.4860

• coherent Raman scattering
• stimulated Raman scattering
• nonlinear-optical microscopy
• ultrashort pulses

We demonstrate a compact laser platform that integrates stimulated and coherent Raman microscopy with high-resolution nonlinear Raman spectroscopy. Ultrashort laser pulses with a carefully managed, broadly tunable chirp are shown to enable a comfortable switching between the high-contrast microscopy and high-resolution spectroscopy modalities in both stimulated and coherent versions of nonlinear Raman scattering. Sub-10-cm(-1) spectral resolution in stimulated Raman spectroscopy is demonstrated through a careful compensation of nonlinear phase distortions of ultrashort laser pulses. This offers a powerful tool for a reliable identification of molecular vibrations with close frequencies, enhancing the chemical selectivity of spectroscopic analysis of complex multicomponent systems.

• 出版日期2016-9