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

Reference:

Jones, A. M., Nampoothiri, A. V. V., Ratanavis, A., Fiedler, T., Wheeler, N. V., Couny, F., Kadel, R., Benabid, F., Washburn, B. R., Corwin, K. L. and Rudolph, W., 2011. Mid-infrared gas filled photonic crystal fiber laser based on population inversion. Optics Express, 19 (3), pp. 2309-2316.

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Official URL:

http://dx.doi.org/10.1364/OE.19.002309

Abstract

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 m and lases at 3.12 m and 3.16 m 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.

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