Multiplex CARS imaging with spectral notch shaped laser pulses delivered by optical fibers

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We present an experimental demonstration of single-pulse coherent anti-Stokes Raman spectroscopy (CARS) using a spectrally shaped broadband laser that is delivered by an optical fiber to a sample at its distal end. The optical fiber consists of a fiber Bragg grating component to serve as a narrowband notch filter and a combined large-mode-area fiber to transmit such shaped ultrashort laser pulses without spectral distortion in a long distance. Experimentally, our implementation showed a capability to measure CARS spectra of various samples with molecular vibrations in the fingerprint region. Furthermore, CARS imaging of poly(methyl methacrylate) bead samples was carried out successfully under epi-CARS geometry in which backward-scattered CARS signals were collected into a multimode optical fiber. A compatibility of single-pulse CARS scheme with fiber optics, verified in this study, implies a potential for future realization of compact all-fiber CARS spectroscopic imaging systems. (C) 2017 Optical Society of America under the terms of the OSA Open Access Publishing Agreement
Publisher
OPTICAL SOC AMER
Issue Date
2017-12
Language
English
Article Type
Article
Keywords

RAMAN SCATTERING MICROSCOPY; PHOTONIC CRYSTAL FIBER; LIGHT-SOURCE; COHERENT; MICROSPECTROSCOPY; SPECTROSCOPY

Citation

OPTICS EXPRESS, v.25, no.25, pp.32178 - 32188

ISSN
1094-4087
DOI
10.1364/OE.25.032178
URI
http://hdl.handle.net/10203/237677
Appears in Collection
ME-Journal Papers(저널논문)
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