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24 February 2012 ElectricOIL performance enhancement via increases in g0L
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Continuing experiments with Electric Oxygen-Iodine Laser (ElectricOIL) technology have significantly increased laser power output by increasing the product of gain and gain-length, g0L. The authors report on progress with recent ElectricOIL devices utilizing a new concentric discharge geometry with improved O2(a1▵) production at higher discharge operating pressure at higher system flow rates. O2(a1▵) produced in flowing radio-frequency discharge in O2- He-NO gas mixture is used to pump I(2P1/2) by near-resonant energy transfer, and laser power is extracted on the I(2P1/2) → I(2P3/2) transition at 1315 nm. Modeling of recent data is presented. By increasing the gain length (system size) by a factor of 3, a 5-fold increase in laser output on the 1315-nm transition of atomic iodine was achieved. Flow conditions with g0L = 0.042 were used to extract a continuous wave (CW) average total laser power of 481 W. A low frequency ±11.9% oscillation in the total power was observed giving a peak outcoupled power of 538 W.
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David L. Carroll, Gabriel Benavides, Joseph Zimmerman, Brian Woodard, Andrew D. Palla, Joseph T. Verdeyen, and Wayne C. Solomon "ElectricOIL performance enhancement via increases in g0L", Proc. SPIE 8238, High Energy/Average Power Lasers and Intense Beam Applications VI; Atmospheric and Oceanic Propagation of Electromagnetic Waves VI, 823803 (24 February 2012);

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