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Ultra‐compact tunable fiber laser for coherent anti‐Stokes Raman imaging
Author(s) -
Gottschall Thomas,
MeyerZedler Tobias,
Schmitt Michael,
Huber Robert,
Popp Juergen,
Tünnermann Andreas,
Limpert Jens
Publication year - 2021
Publication title -
journal of raman spectroscopy
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.748
H-Index - 110
eISSN - 1097-4555
pISSN - 0377-0486
DOI - 10.1002/jrs.6171
Subject(s) - raman spectroscopy , materials science , raman scattering , optics , fiber laser , laser , optoelectronics , raman laser , coherent anti stokes raman spectroscopy , narrowband , physics
This work describes the construction of an ultra‐compact narrowband fiber laser source for coherent anti‐Stokes Raman scattering microscopy of Raman tags, that is, for addressing Raman resonances of deuterated molecules and alkyne tags in the spectral range from 2080 to 2220 cm −1 . A narrowband and fast electronically tunable cw seed source based on a semiconductor optical amplifier (SOA) emitting around 1335 nm has been employed to seed four‐wave mixing (FWM) in an endlessly single mode fiber (ESM) pumped by a ps pulse duration Yb‐fiber laser. A conversion efficiency of 50% is demonstrated. This compact fiber optical parametric amplifier (FOPA) has been used to perform coherent anti‐Stokes Raman imaging experiments of crystalline deuterated palmitic acid.