Abstract

The barium vapor laser (BVL) is an efficient source of infrared radiation, oscillating on a number of transitions in the range 1.13-6.45 μm, with notable strong transitions at 1.13, 1.50,2.55, and 2.92 μm1 Total average powers of up to 12.5 W (mainly at 1.13 and 1.50 μm) have been achieved at 0.54% efficiency with a pulse recurrence frequency (PRF) of 13.3 kHz.2 The highest reported efficiency to date of 0.72% was achieved using the same system and corresponded to a laser output power of 3.1 W (at 8 kHz FRF). It is known3,4 that the addition of hydrogen to copper vapor lasers (CVLs) can significantly increase (up to two times) both average laser power and efficiency. We now report large increases (40%) in both output power and efficiency of a BVL with the addition of hydrogen. We believe the efficiencies (up to 0.94% based on stored energy) obtained in the present work are the highest reported to date for a BVL.

© 1993 Optical Society of America

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References

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