Abbreviated Journal Title
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 of combining channels.
Ott, Daniel; Divliansky, Ivan; Anderson, Brian; Venus, George; and Glebov, Leonid, "Scaling the spectral beam combining channels in a multiplexed volume Bragg grating" (2013). Faculty Bibliography 2010s. 4501.