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Proceedings Paper

Mode-converters for rectangular-core fiber amplifiers to achieve diffraction-limited power scaling
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Paper Abstract

A rectangular-core fiber that guides and amplifies a higher-order-mode can potentially scale to much higher average powers than what is possible in traditional circular core large-mode-area fibers. Such an amplifier would require mode-conversion at the input and output to enable interfacing with TEM00 mode seed sources and generate diffraction-limited radiation for various applications. We discuss the simulation and experimental results of a mode conversion technique that uses two diffractive-optic-elements in conjugate Fourier planes to convert a diffraction limited TEM00 mode to the higher-order-mode of a ribbon core fiber. Our experiments show that the mode-conversion-efficiency exceeds 84% and can theoretically approach 100%.

Paper Details

Date Published: 7 May 2012
PDF: 6 pages
Proc. SPIE 8381, Laser Technology for Defense and Security VIII, 838103 (7 May 2012); doi: 10.1117/12.920769
Show Author Affiliations
Arun Kumar Sridharan, Lawrence Livermore National Lab. (United States)
Paul H. Pax, Lawrence Livermore National Lab. (United States)
John E. Heebner, Lawrence Livermore National Lab. (United States)
Derrek R. Drachenberg, Lawrence Livermore National Lab. (United States)
Jay W. Dawson, Lawrence Livermore National Lab. (United States)


Published in SPIE Proceedings Vol. 8381:
Laser Technology for Defense and Security VIII
Mark Dubinskii; Stephen G. Post, Editor(s)

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