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Novel highly efficient in-band pump wavelengths for Ho-doped fiber amplifiers

: Tench, Robert; Delavaux, Jean-Marc; Romano, Clément


Zervas, M.N. ; Society of Photo-Optical Instrumentation Engineers -SPIE-, Bellingham/Wash.:
Fiber Lasers XVIII: Technology and Systems : 6-11 March 2021, Online Only, United States
Bellingham, WA: SPIE, 2021 (Proceedings of SPIE 11665)
ISBN: 978-1-5106-4165-5
ISBN: 978-1-5106-4166-2
Paper 116650F, 8 S.
Conference "Fiber Lasers - Technology and Systems" <18, 2021, Online>
Fraunhofer IOSB ()

We report the design and performance of Holmium-doped fiber amplifiers (HDFAs) with novel alternative in-band pump wavelengths in the 1720-2000 nm spectral region. We demonstrate through simulations that pump wavelengths of 1840-1860 nm can yield significantly improved output power (3-6dB), gain (8-10 dB) , and optical-optical conversion efficiency compared to the previous technical and industry standard pump wavelength of 1940 nm. Experimental results fully confirm our simulations.