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Photonic crystal fiber technology for monolithic single-mode large-mode-area all-solid amplifier
Author(s): Simon L. Christensen; Sidsel R. Papior; Mette M. Johansen; Jakob M. Hauge; Johannes Weirich; Christian Jakobsen; Mattia Michieletto; Magalie Bondu; Marco Triches; Thomas T. Alkeskjold; Jesper Lægsgaard
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Paper Abstract

In this work, an all-solid Ytterbium doped double-clad single-mode (SM) large-mode-area (LMA) photonic crystal fiber (PCF) is characterized in a monolithic amplifier setup. The characterized all-solid PCF combines the SM operation of LMA PCFs while maintaining simple splicing of all-solid fibers. The fiber has been tested in a pulsed monolithic forward pumped amplifier system achieving excellent modal properties. The fiber is polarization maintaining and has a mode field diameter of approximately 24 μm. At optimal fiber length the output signal power of the amplifier was measured to 43 W limited by pump power with an optical to optical efficiency of 61 %. Polarization extinction ratios (PER) above 18 dB was observed for all fiber lengths. Simple splicing with splice losses < 0.2 dB and maintained polarization are reported using a standard Fujikura fusion splicer.

Paper Details

Date Published: 7 March 2019
PDF: 7 pages
Proc. SPIE 10897, Fiber Lasers XVI: Technology and Systems, 108971L (7 March 2019); doi: 10.1117/12.2506995
Show Author Affiliations
Simon L. Christensen, Technical Univ. of Denmark (Denmark)
Sidsel R. Papior, NKT Photonics A/S (Denmark)
Mette M. Johansen, NKT Photonics A/S (Denmark)
Jakob M. Hauge, Technical Univ. of Denmark (Denmark)
Johannes Weirich, NKT Photonics A/S (Denmark)
Christian Jakobsen, NKT Photonics A/S (Denmark)
Mattia Michieletto, NKT Photonics A/S (Denmark)
Magalie Bondu, NKT Photonics A/S (Denmark)
Marco Triches, NKT Photonics A/S (Denmark)
Thomas T. Alkeskjold, NKT Photonics A/S (Denmark)
Jesper Lægsgaard, Technical Univ. of Denmark (Denmark)

Published in SPIE Proceedings Vol. 10897:
Fiber Lasers XVI: Technology and Systems
Adrian L. Carter; Liang Dong, Editor(s)

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