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Proceedings Paper

Photonic crystal fiber technology for high-performance all-fiber monolithic ultrafast fiber amplifiers
Author(s): Sidsel R. Papior; Johannes Weirich; Mette M. Johansen; Christian Jakobsen; Mattia Michieletto; Marco Triches; Torben Kristensen; Anders S. Olesen; Christian Petersen; Thomas V. Andersen; Martin D. Maack; Thomas T. Alkeskjold
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Paper Abstract

Photonic crystal fiber (PCF) technology for ultrafast fiber amplifiers traditionally uses air holes as key elements for large mode area (LMA) fiber designs. These air holes are crucial for the performance of high-end LMA PCFs, but makes splicing and interfacing more complex. To reduce this complexity in mid-range amplifiers, we present single-mode polarization-maintaining Yb-doped LMA PCFs without air holes for easier splicing into monolithic all-fiber amplifier designs.

A 30 μm core all-solid spliceable PCF is presented, and amplification of 1064 nm light above 50 W with an optical to optical efficiency of 80 % is demonstrated.

Furthermore, to demonstrate the excellent reliability of PCF based monolithic amplifiers, we demonstrate ultra-longterm performance data of > 35 khrs on a 14 μm core step-index type PCF amplifier with low long-term power degradation slope of < 1.5 % / 10,000 h.

Paper Details

Date Published: 26 February 2018
PDF: 4 pages
Proc. SPIE 10512, Fiber Lasers XV: Technology and Systems, 1051212 (26 February 2018);
Show Author Affiliations
Sidsel R. Papior, NKT Photonics A/S (Denmark)
Johannes Weirich, NKT Photonics A/S (Denmark)
Mette M. Johansen, NKT Photonics A/S (Denmark)
Christian Jakobsen, NKT Photonics A/S (Denmark)
Mattia Michieletto, NKT Photonics A/S (Denmark)
Marco Triches, NKT Photonics A/S (Denmark)
Torben Kristensen, NKT Photonics A/S (Denmark)
Anders S. Olesen, NKT Photonics A/S (Denmark)
Christian Petersen, NKT Photonics A/S (Denmark)
Thomas V. Andersen, NKT Photonics A/S (Denmark)
Martin D. Maack, NKT Photonics A/S (Denmark)
Thomas T. Alkeskjold, NKT Photonics A/S (Denmark)

Published in SPIE Proceedings Vol. 10512:
Fiber Lasers XV: Technology and Systems
Ingmar Hartl; Adrian L. Carter, Editor(s)

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