Abstract
This paper reports simple coaxial flashlamp-excited dye lasers developed and fabricated high power, frequency tunable light sources for use in a variety of spectroscopy and optical instrumentation systems such as laser radars and remote sensors. Optimum design parameters of the discharge tube length and the annular width are obtained. The operational performances used as a dye laser oscillator and an amplifier are investigated using Rhodamine 6G in ethanol and pure water-Ammonyx LO solvents. In the oscillator mode of operation, maximum output energy of about 400 mJ and energy conversion efficiency of 0.12% are realized. In the amplifier mode, effective output gain of 120 is measured and a stable synchronization of the flashlamp discharge with the oscillator laser is attained by utilizing simmer discharge technique. Higher pulse repetition rate and smaller laser beam divergence are possible by using pure water as a dye solvent than ethanol. No remarkable output degradation of the coaxial flashlamp is observed in excess of 1000 shots at 300J input energy.
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