Efficient power scaling of laser radiation by spectral beam combining
Abbreviated Journal Title
FIBER LASERS; Optics
The possibility of achieving multikilowatt laser radiation by spectrally combining beams using volume Bragg gratings (VBGs) is shown. The VBGs recorded in a photothermorefractive glass exhibit long-term stability of all its parameters in high-power laser beams with power density >1 MW/cm(2) in the cw beam of total power on a kilowatt level. We consider an architecture-specific beam-combining scheme and address the cross-talk minimization problem based on optimal channel positioning. Five-channel high efficiency spectral beam combining resulted in a >750 W near-diffraction-limited cw beam has been demonstrated experimentally. (C) 2008 Optical Society of America.
"Efficient power scaling of laser radiation by spectral beam combining" (2008). Faculty Bibliography 2000s. 964.