Title
Thermal tuning of volume Bragg gratings for spectral beam combining of high-power fiber lasers
Abbreviated Journal Title
Appl. Optics
Keywords
HIGH AVERAGE POWER; ORDER MODE; AMPLIFIERS; AREA; Optics
Abstract
High-radiance lasers are desired for many applications in defense and manufacturing. Spectral beam combining (SBC) by volume Bragg gratings (VBGs) is a very promising method for high-radiance lasers that need to achieve 100 kW level power. Laser-induced heating of VBGs under high-power radiation presents a challenge for maintaining Bragg resonance at various power levels without mechanical realignment. A novel thermal tuning technique and apparatus is presented that enables maintaining peak efficiency operation of the SBC system at various power levels without any mechanical adjustment. The method is demonstrated by combining two high-power ytterbium fiber lasers with high efficiency from low power to full combined power of 300 W (1.5 kW effective power), while maintaining peak combining efficiency within 0.5%. (C) 2014 Optical Society of America
Journal Title
Applied Optics
Volume
53
Issue/Number
6
Publication Date
1-1-2014
Document Type
Article
Language
English
First Page
1242
Last Page
1246
WOS Identifier
ISSN
1559-128X
Recommended Citation
"Thermal tuning of volume Bragg gratings for spectral beam combining of high-power fiber lasers" (2014). Faculty Bibliography 2010s. 5276.
https://stars.library.ucf.edu/facultybib2010/5276
Comments
Authors: contact us about adding a copy of your work at STARS@ucf.edu