7 May 2012 Mode-converters for rectangular-core fiber amplifiers to achieve diffraction-limited power scaling
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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%.
© (2012) COPYRIGHT Society of Photo-Optical Instrumentation Engineers (SPIE). Downloading of the abstract is permitted for personal use only.
Arun Kumar Sridharan, Arun Kumar Sridharan, Paul H. Pax, Paul H. Pax, John E. Heebner, John E. Heebner, Derrek R. Drachenberg, Derrek R. Drachenberg, Jay W. Dawson, Jay W. Dawson, "Mode-converters for rectangular-core fiber amplifiers to achieve diffraction-limited power scaling", Proc. SPIE 8381, Laser Technology for Defense and Security VIII, 838103 (7 May 2012); doi: 10.1117/12.920769; https://doi.org/10.1117/12.920769


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