Open AccessAll-fiber single-cavity dual-comb for coherent anti-Stokes Raman scattering spectroscopy based on spectral focusing
Author(s) -
Yi Qin,
Benjamin Cromey,
Orkhongua Batjargal,
Khanh Kieu
Publication year - 2020
Publication title -
optics letters/optics index
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.524
H-Index - 272
eISSN - 1071-2763
pISSN - 0146-9592
DOI - 10.1364/ol.413431
Subject(s) - materials science , raman spectroscopy , supercontinuum , laser , spectroscopy , optics , raman scattering , fiber , fiber laser , analytical chemistry (journal) , wavelength , optoelectronics , photonic crystal fiber , physics , chemistry , chromatography , quantum mechanics , composite material
We report an all-fiber free-running bidirectional dual-comb laser system for coherent anti-Stokes Raman scattering spectroscopy based on spectral focusing. The mode-locked oscillator is a bidirectional ring-cavity erbium fiber laser running at a repetition rate of ∼114 M H z . One output of the bidirectional laser is wavelength-shifted from 1560 to 1060 nm via supercontinuum generation for use as the pump source. We have been able to record the Raman spectra of various samples such as polystyrene, olive oil, polymethyl methacrylate (PMMA), and polyethylene in the C-H stretching window. We believe that this all-fiber laser design has promising potential for coherent Raman spectroscopy and also label-free imaging for a variety of practical applications.