Enhanced spontaneous Raman scattering and gas composition analysis using a photonic crystal fiber.

Spontaneous gas-phase Raman scattering using a hollow-core photonic bandgap fiber (HC-PBF) for both the gas cell and the Stokes light collector is reported. It was predicted that the HC-PBF configuration would yield several hundred times signal enhancement in Stokes power over a traditional free-space configuration because of increased interaction lengths and large collection angles. Predictions were verified by using nitrogen Stokes signals. The utility of this system was demonstrated by measuring the Raman signals as functions of concentration for major species in natural gas. This allowed photomultiplier-based measurements of natural gas species in relatively short integration times, measurements that were previously difficult with other systems.

[1]  Robert Pastel,et al.  Particle manipulation and surface patterning by laser guidance , 1998 .

[2]  Peter Geiser,et al.  Laser trapping of microscopic particles for undergraduate experiments , 2000 .

[3]  Shu-Guang Li,et al.  Study of the sensitivity of gas sensing by use of index-guiding photonic crystal fibers. , 2007, Applied optics.

[4]  P. Russell.  Photonic Crystal Fiber:Finding the Holey Grail , 2007 .

[5]  G. Laufer,et al.  Coherent anti‐Stokes Raman scattering in a hollow dielectric waveguide , 1977 .

[6]  F. Benabid,et al.  Stimulated Raman Scattering in Hydrogen-Filled Hollow-Core Photonic Crystal Fiber , 2002, Science.

[7]  A. Zheltikov.  Ultrashort light pulses in hollow waveguides , 2002 .

[8]  E. Marcatili,et al.  Hollow metallic and dielectric waveguides for long distance optical transmission and lasers , 1964 .

[9]  S. Howdle,et al.  Can High-Pressure Raman Spectroscopy Be Simplified? A Microscale Optical-Fiber Capillary Cell for the Study of Supercritical Fluids , 1994 .

[10]  Richard B. Miles,et al.  Phase-matched four-wave mixing and sensing of water molecules by coherent anti-Stokes Raman scattering in large-core-area hollow photonic-crystal fibers , 2005 .

[11]  Jan Hald,et al.  Dynamics of gas flow in hollow core photonic bandgap fibers. , 2008, Applied optics.

[12]  S. Porto,et al.  Raman cross section of some simple gases , 1973 .

[13]  P. Roberts,et al.  Ultimate low loss of hollow-core photonic crystal fibres. , 2005, Optics express.

[14]  Scott D. Schwab,et al.  Remote, Long-Pathlength Cell for High-Sensitivity Raman Spectroscopy , 1987 .

[15]  O. Svelto,et al.  Generation of high-energy 10-fs pulses by a new pulse compression technique , 1996, Summaries of papers presented at the Conference on Lasers and Electro-Optics.

[16]  P. Russell,et al.  Stokes amplification regimes in quasi-cw pumped hydrogen-filled hollow-core photonic crystal fiber. , 2005, Physical review letters.

[17]  A. Bjarklev,et al.  Gas sensing using air-guiding photonic bandgap fibers , 2004, Conference on Lasers and Electro-Optics, 2004. (CLEO)..

[18]  A. Sokolov,et al.  Optimized control of generation of few cycle pulses by molecular modulation , 2006 .

[19]  A. Zheltikov,et al.  Coherent anti-Stokes Raman scattering in isolated air-guided modes of a hollow-core photonic-crystal fiber , 2004 .

[20]  P. Russell,et al.  Photonic Crystal Fibers , 2003, Science.

[21]  S. Harris,et al.  Molecular modulation in a hollow fiber. , 2006, Optics letters.

[22]  H. G. Schulze,et al.  Hollow-core photonic crystal fiber-optic probes for Raman spectroscopy. , 2006, Optics letters.

[23]  J A Harrington,et al.  Attenuation, modal, and polarization properties of n < 1, hollow dielectric waveguides. , 1993, Applied optics.

[24]  Michael M. Carrabba,et al.  The Utilization of a Holographic Bragg Diffraction Filter for Rayleigh Line Rejection in Raman Spectroscopy , 1990 .

[25]  Richard L. McCreery,et al.  Raman Spectroscopy for Chemical Analysis , 2000 .