Open AccessEfficient anti-Stokes generation via intermodal stimulated Raman scattering in gas-filled hollow-core PCF
Author(s) -
Barbara M. Trabold,
A. Abdolvand,
T. G. Euser,
P. St. J. Russell
Publication year - 2013
Publication title -
optics express
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.394
H-Index - 271
ISSN - 1094-4087
DOI - 10.1364/oe.21.029711
Subject(s) - optics , raman scattering , photonic crystal fiber , dispersion (optics) , materials science , raman spectroscopy , signal (programming language) , core (optical fiber) , coherent anti stokes raman spectroscopy , spatial light modulator , phase (matter) , optical fiber , physics , quantum mechanics , computer science , programming language
A strong anti-Stokes Raman signal, from the vibrational Q(1) transition of hydrogen, is generated in gas-filled hollow-core photonic crystal fiber. To be efficient, this process requires phase-matching, which is not automatically provided since the group velocity dispersion is typically non-zero and--inside a fiber--cannot be compensated for using a crossed-beam geometry. Phase-matching can however be arranged by exploiting the different dispersion profiles of higher-order modes. We demonstrate the generation of first and second anti-Stokes signals in higher-order modes by pumping with an appropriate mixture of fundamental and a higher-order modes, synthesized using a spatial light modulator. Conversion efficiencies as high as 5.3% are achieved from the pump to the first anti-Stokes band.