Title

Beam Combining Of Lasers With High Spectral Density Using Volume Bragg Gratings

Keywords

Laser beam combining; Photorefractive materials; Volume holographic gratings

Abstract

Incoherent combining of multiple laser beams with offset wavelengths into a single near-diffraction-limited beam is an effective solution to increasing energy brightness and scaling output power of high-power lasers. Volume Bragg gratings (VBGs) recorded in photo-thermo-refractive (PTR) glass allow spectral beam combining with a remarkably high spectral density of channels. Spectral beam combining (SBC) of five channels within 1-2 nm bandwidth around 1064 and 1550 nm into a single near-diffraction-limited beam with absolute efficiency 92-94% is demonstrated. Scaling of this technique to multi-kW power level is discussed. © 2009 Elsevier B.V.

Publication Date

7-1-2009

Publication Title

Optics Communications

Volume

282

Issue

13

Number of Pages

2560-2563

Document Type

Article

Personal Identifier

scopus

DOI Link

https://doi.org/10.1016/j.optcom.2009.03.019

Socpus ID

65549138160 (Scopus)

Source API URL

https://api.elsevier.com/content/abstract/scopus_id/65549138160

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