Tunable far IR molecular lasers developed

Physics

Scientific paper

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Gas Lasers, Infrared Lasers, Raman Spectra, Tunable Lasers, Carbon Dioxide Lasers, Far Infrared Radiation, Laser Outputs, Optical Pumping, Power Efficiency, Quantum Numbers

Scientific paper

The development of molecular gas lasers based on stimulated Raman scattering and tunable in the FIR is discussed in a general survey of recent experiments. The physical principles involved and the limitations they may impose are reviewed; the early attempts to achieve FIR tunability with complex optical systems, ruby and dye laser pumps, and HCl and HF media are described; two recent devices using CO2-laser-pumped methyl fluoride are characterized; and the prospects for further development are explored. Output pulses of energy 0.1-1.0 mJ and instantaneous power 1-10 kW have been achieved over the wavelength range 250-300 microns.

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