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21 April 2017 Pulsed amplification of 2 μm composite vortex beams (Conference Presentation)
Keith Miller, Yuan Li, Wenzhe Li, Ramesh K. Shori, Eric G. Johnson
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Proceedings Volume 10082, Solid State Lasers XXVI: Technology and Devices; 1008205 (2017) https://doi.org/10.1117/12.2256595
Event: SPIE LASE, 2017, San Francisco, California, United States
Abstract
In this effort, we report on the preservation of the spatial mode quality as composite vortex beams propagate through a flashlamp pumped amplifier system. Because of the spatially asymmetric nature of the transient thermal lensing, a laser beam propagating through this type of amplifier will be distorted. This makes an ideal environment to assess the mode integrity of propagating composite vortex beams. We demonstrate that a 3-lobe composite vortex beam can propagate under extreme transient thermal lensing and maintain the mode structure through the amplification process. Even though the actual amplification wasn’t the main thrust of this effort, we demonstrate gain greater than a factor of 4 for two different seed energy levels. Since the flashlamp pumped system is an extreme case, this result shows the potential for using concentric vortex beams in high power amplifiers and could open up new applications in propagation and sensing.
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Keith Miller, Yuan Li, Wenzhe Li, Ramesh K. Shori, and Eric G. Johnson "Pulsed amplification of 2 μm composite vortex beams (Conference Presentation)", Proc. SPIE 10082, Solid State Lasers XXVI: Technology and Devices, 1008205 (21 April 2017); https://doi.org/10.1117/12.2256595
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KEYWORDS
Composites
Laser beam propagation
Amplifiers
Lithium
Sensing systems
Current controlled current source
Laser applications
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