Title

Thermal Tuning Of Volume Bragg Gratings For Spectral Beam Combining Of High-Power Fiber Lasers

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%.

Publication Date

2-20-2014

Publication Title

Applied Optics

Issue

6

Number of Pages

1242-1246

Document Type

Article

Personal Identifier

scopus

DOI Link

https://doi.org/10.1364/AO.53.001242

Socpus ID

84942369310 (Scopus)

Source API URL

https://api.elsevier.com/content/abstract/scopus_id/84942369310

This document is currently not available here.

Share

COinS