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Scaling The Spectral Beam Combining Channels In A Multiplexed Volume Bragg Grating, Daniel Ott, Ivan Divliansky, Brian Anderson, George Venus, Leonid Glebov

Faculty Bibliography 2010s

In order to generate high power laser radiation it is often necessary to combine multiple lasers into a single beam. The recent advances in high power spectral beam combining using multiplexed volume Bragg gratings recorded in photo-thermo-refractive glass are presented. The focus is on using multiple gratings recorded within the same volume to lower the complexity of the combining system. Combining of 420 W with 96% efficiency using a monolithic, multiplexed double grating recorded in PTR glass is demonstrated. A multiplexed quadruple grating that maintains high efficiency and good beam quality is demonstrated to pave a way for further scaling …