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25W, 2µm Broadband Polarization-Maintaining Hybrid Ho- and Tm-Doped Fiber Amplifier

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

Postprint urn:nbn:de:0011-n-5347439 (689 KByte PDF)
MD5 Fingerprint: 77320445863a48dfc3eb39907936796c
Copyright Society of Photo-Optical Instrumentation Engineers. One print or electronic copy may be made for personal use only. Systematic reproduction and distribution, duplication of any material in this paper for a fee or for commercial purposes, or modification of the content of the paper are prohibited.
Created on: 26.2.2019

Carter, A.L. ; Society of Photo-Optical Instrumentation Engineers -SPIE-, Bellingham/Wash.:
Fiber lasers XVI. Technology and systems : 4-7 February 2019, San Francisco, California, United States
Bellingham, WA: SPIE, 2019 (Proceedings of SPIE 10897)
ISBN: 978-1-5106-2437-5
ISBN: 978-1-5106-2436-8
Paper 108970K, 9 pp.
Conference "Fiber Lasers - Technology and Systems" <16, 2018, San Francisco/Calif.>
Conference Paper, Electronic Publication
Fraunhofer IOSB ()

Current developments in LIDAR and atmospheric sensing experiments highlight the need for multi-watt, large bandwidth, high dynamic range polarization-maintaining optical amplifiers in the eye safe 1.9—2.15 μm band. So far, as an illustration of the previous state of the art for high power devices, multi-watt Tm-doped fiber amplifiers (TDFAs) have been demonstrated by Goodno et al. with an output power of 608 W at a signal wavelength of 2040 nm. As for Ho-doped fiber amplifiers (HDFAs) Hemming et al. have reported output powers of 265 W at 2110 nm. For this HDFA, a double clad Ho-doped fiber pumped by high power fiber lasers made the configuration complex and yielded an optical slope efficiency of 41%. Both of these achievements were with standard (non-polarization-maintaining) fiber.