Ultimate efficiency of spectral beam combining by volume Bragg gratings

Autor: Glebov, L.B., Drachenberg, Derrek, Andrusyak, Oleksiy, Venus, George, Smirnov, Vadim, Lumeau, Julien, Glebov, Leonid
Přispěvatelé: The College of Optics and Photonics [Orlando] (CREOL), University of Central Florida [Orlando] (UCF), Center for Research and Education in Optics and Lasers (CREOL), University of Central Florida [Orlando] (UCF)-School of Optics, OptiGrate, OptiGrate Corporation, RCMO (RCMO), Institut FRESNEL (FRESNEL), Centre National de la Recherche Scientifique (CNRS)-École Centrale de Marseille (ECM)-Aix Marseille Université (AMU)-Centre National de la Recherche Scientifique (CNRS)-École Centrale de Marseille (ECM)-Aix Marseille Université (AMU), Aix Marseille Université (AMU)-École Centrale de Marseille (ECM)-Centre National de la Recherche Scientifique (CNRS)-Aix Marseille Université (AMU)-École Centrale de Marseille (ECM)-Centre National de la Recherche Scientifique (CNRS)
Jazyk: angličtina
Rok vydání: 2013
Předmět:
Zdroj: Applied optics
Applied optics, Optical Society of America, 2013, 52 (30), pp.7233-7242
Applied optics, 2013, 52 (30), pp.7233-7242
ISSN: 0003-6935
1539-4522
1559-128X
2155-3165
Popis: International audience; Spectral beam combining (SBC) by volume Bragg gratings (VBGs) recorded in photo-thermo-refractive (PTR) glass is a powerful tool for laser applications that require higher radiance than a single laser unit can achieve. The beam-combining factor (BCF) is introduced as a tool to compare various beam-combining methods and experiments. It describes the change of radiance provided by a beam-combining system but is not affected by the initial beam quality of the combined lasers. A method of optimization of VBGs providing the maximum efficiency of SBC has been described for an arbitrary number of beams. An experiment confirming the proposed modeling for a two-beam SBC system by a single VBG has demonstrated a total combined power of 301 W with a channel separation of 0.25 nm, combining efficiency of 97%, close to diffraction limited divergence with M2=1.18, BCF of 0.77, and spectral radiance of 770 TW/(sr⋅m2⋅nm), the highest to date for SBC.
Databáze: OpenAIRE
Externí odkaz: