Mid-infrared gas filled photonic crystal fiber laser based on population inversion.

We demonstrate for the first time an optically pumped gas laser based on population inversion using a hollow core photonic crystal fiber (HC-PCF). The HC-PCF filled with 12C2H2 gas is pumped with ~5 ns pulses at 1.52 μm and lases at 3.12 μm and 3.16 μm in the mid-infrared spectral region. The maximum measured laser pulse energy of ~6 nJ was obtained at a gas pressure of 7 torr with a fiber with 20 dB/m loss near the lasing wavelengths. While the measured slope efficiencies of this prototype did not exceed a few percent due mainly to linear losses of the fiber at the laser wavelengths, 25% slope efficiency and pulse energies of a few mJ are the predicted limits of this laser. Simulations of the laser's behavior agree qualitatively with experimental observations.

[1]  W. Rudolph,et al.  Feasibility study of optically pumped molecular lasers with small quantum defect , 2010 .

[2]  W Rudolph,et al.  Molecular C2H2 and HCN lasers pumped by an optical parametric oscillator in the 1.5-microm band. , 2010, Optics express.

[3]  F Benabid,et al.  Ultrahigh efficiency laser wavelength conversion in a gas-filled hollow core photonic crystal fiber by pure stimulated rotational Raman scattering in molecular hydrogen. , 2004, Physical review letters.

[4]  Jonathan Shephard,et al.  High energy nanosecond laser pulses delivered single-mode through hollow-core PBG fibers. , 2004, Optics express.

[5]  Fetah Benabid,et al.  Double photonic bandgap hollow-core photonic crystal fiber. , 2009, Optics express.

[6]  Federico Capasso,et al.  Quantum Cascade Surface-Emitting Photonic Crystal Laser , 2003, Science.

[7]  Knight,et al.  Single-Mode Photonic Band Gap Guidance of Light in Air. , 1999, Science.

[8]  Boris V. Zhdanov,et al.  Diode pumped caesium laser , 2005 .

[9]  O. Wood,et al.  An optically pumped CO 2 laser , 1972 .

[10]  T. A. Birks,et al.  Compact, stable and efficient all-fibre gas cells using hollow-core photonic crystal fibres , 2005, Nature.

[11]  J. Faist,et al.  The Quantum Cascade Laser , 1994 .

[12]  Gordon D. Hager,et al.  Experimental investigation of an optically pumped mid-infrared carbon monoxide laser , 1999 .

[13]  T. Bridges,et al.  Laser action at 452, 496, and 541 μm in optically pumped CH3F , 1970 .

[14]  R. Knize,et al.  Diode Pumped Cesium Laser , 2005, 2005 Quantum Electronics and Laser Science Conference.

[15]  N. Campbell,et al.  Cascade lasing of molecular HBr in the four-micron region pumped by a Nd:YAG laser , 2002, SPIE High-Power Laser Ablation.

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

[17]  F. Capasso,et al.  Quantum cascade lasers in chemical physics , 2010 .

[18]  Alexander L Gaeta,et al.  Nonlinear optics in hollow-core photonic bandgap fibers. , 2008, Optics express.

[19]  J. Shephard,et al.  Single-mode mid-IR guidance in a hollow-core photonic crystal fiber. , 2005, Optics express.

[20]  R. Beach,et al.  Analysis of the scalability of diffraction-limited fiber lasers and amplifiers to high average power. , 2008, Optics express.

[21]  Gordon D. Hager,et al.  Frequency-tunable optically pumped carbon monoxide laser , 2000 .

[22]  Gordon D. Hager,et al.  An optically pumped mid-infrared HBr laser , 1994 .

[23]  H. Fetterman,et al.  Optically pumped vibrational transition laser in OCS , 1975 .

[24]  F Benabid,et al.  Generation and Photonic Guidance of Multi-Octave Optical-Frequency Combs , 2007, Science.

[25]  J. Neumann,et al.  Über merkwürdige diskrete Eigenwerte , 1993 .