title: Raman probes based on optically-poled double-clad fiber and coupler.
abstract: Two fiber Raman probes are presented, one based on an optically-poled double-clad fiber and the second based on an optically-poled double-clad fiber coupler respectively. Optical poling of the core of the fiber allows for the generation of enough 532nm light to perform Raman spectroscopy of a sample of dimethyl sulfoxide (DMSO), when illuminating the waveguide with 1064nm laser light. The Raman signal is collected in the inner cladding, from which it is retrieved with either a bulk dichroic mirror or a double-clad fiber coupler. The coupler allows for a substantial reduction of the fiber spectral background signal conveyed to the spectrometer.
authors.affiliation: DTU Fotonik, Technical University of Denmark, Ørsteds Plads 343, DK-2800 Kgs. Lyngby, Denmark. acbr@fotonik.dtu.dk
authors.forename: Anna Chiara
authors.initials: AC
authors.lastname: Brunetti
authors.forename: Walter
authors.initials: W
authors.lastname: Margulis
authors.forename: Karsten
authors.initials: K
authors.lastname: Rottwitt
mesh_terms: D004867:Equipment Design; D019544:Equipment Failure Analysis; D005336:Fiber Optic Technology / Q000295:instrumentation*; D007909:Lenses; D013059:Spectrum Analysis, Raman / Q000295:instrumentation*; D014159:Transducers