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Proceedings Paper

Characterization of mid-infrared emissions from C2H2, CO, CO2, and HCN-filled hollow fiber lasers
Author(s): A. M. Jones; C. Fourcade-Dutin; C. Mao; B. Baumgart; A. V. V. Nampoothiri; N. Campbell; Y. Wang; F. Benabid; W. Rudolph; B. R. Washburn; K. L. Corwin
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Paper Abstract

We have now demonstrated and characterized gas-filled hollow-core fiber lasers based on population inversion from acetylene (12C2H2) and HCN gas contained within the core of a kagome-structured hollow-core photonic crystal fiber. The gases are optically pumped via first order rotational-vibrational overtones near 1.5 μm using 1-ns pulses from an optical parametric amplifier. Transitions from the pumped overtone modes to fundamental C-H stretching modes in both molecules create narrow-band laser emissions near 3 μm. High gain resulting from tight confinement of the pump and laser light together with the active gas permits us to operate these lasers in a single pass configuration, without the use of any external resonator structure. A delay between the emitted laser pulse and the incident pump pulse has been observed and is shown to vary with pump pulse energy and gas pressure. Furthermore, we have demonstrated lasing beyond 4 μm from CO and CO2 using silver-coated glass capillaries, since fused silica based fibers do not transmit in this spectral region and chalcogenide fibers are not yet readily available. Studies of the laser pulse energy as functions of the pump pulse energy and gas pressure were performed. Efficiencies reaching ~ 20% are observed for both acetylene and CO2.

Paper Details

Date Published: 15 February 2012
PDF: 10 pages
Proc. SPIE 8237, Fiber Lasers IX: Technology, Systems, and Applications, 82373Y (15 February 2012); doi: 10.1117/12.909254
Show Author Affiliations
A. M. Jones, Kansas State Univ. (United States)
C. Fourcade-Dutin, Univ. of Bath (United Kingdom)
C. Mao, The Univ. of New Mexico (United States)
B. Baumgart, The Univ. of New Mexico (United States)
A. V. V. Nampoothiri, The Univ. of New Mexico (United States)
N. Campbell, The Univ. of New Mexico (United States)
Y. Wang, Univ. of Bath (United Kingdom)
F. Benabid, Univ. of Bath (United Kingdom)
Xlim Research Institute, CNRS, Univ. de Limoges (France)
W. Rudolph, The Univ. of New Mexico (United States)
B. R. Washburn, Kansas State Univ. (United States)
K. L. Corwin, Kansas State Univ. (United States)

Published in SPIE Proceedings Vol. 8237:
Fiber Lasers IX: Technology, Systems, and Applications
Eric C. Honea; Sami T. Hendow, Editor(s)

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