Higher order mode selection for power scaling in laser resonators using transmitting Bragg gratings

Brian M. Anderson; George Venus; Dan Ott; Evan Hale; Ivan Divliansky; Derrek R. Drachenberg; Jay Dawson; Mike J. Messerly; Paul H. Pax; John B. Tassano; Leonid B. Glebov

doi:10.1117/12.2177060

20 May 2015 Higher order mode selection for power scaling in laser resonators using transmitting Bragg gratings

Brian M. Anderson, George Venus, Dan Ott, Evan Hale, Ivan Divliansky, Derrek R. Drachenberg, Jay Dawson, Mike J. Messerly, Paul H. Pax, John B. Tassano, Leonid B. Glebov

Author Affiliations +

Proceedings Volume 9466, Laser Technology for Defense and Security XI; 94660C (2015) https://doi.org/10.1117/12.2177060
Event: SPIE Defense + Security, 2015, Baltimore, MD, United States

Abstract

Power scaling using a higher order mode in a ribbon fiber has previously been proposed. However, methods of selecting the higher order mode and converting to a single lobe high brightness beam are needed. We propose using a multiplexed transmitting Bragg grating (MTBG) to convert a higher order mode into a single lobe beam. Using a ribbon fiber with core dimensions of 107.8 μm by 8.3 μm, we use the MTBG to select a higher order mode oscillating within the resonator with 51.4% efficiency, while simultaneously converting the higher order mode to a beam with diffraction limited divergence of 10.2 mrad containing 60% of the total power.

Citation Download Citation

Brian M. Anderson, George Venus, Dan Ott, Evan Hale, Ivan Divliansky, Derrek R. Drachenberg, Jay Dawson, Mike J. Messerly, Paul H. Pax, John B. Tassano, and Leonid B. Glebov "Higher order mode selection for power scaling in laser resonators using transmitting Bragg gratings", Proc. SPIE 9466, Laser Technology for Defense and Security XI, 94660C (20 May 2015); https://doi.org/10.1117/12.2177060

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