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Proceedings Paper

Opportunities in high-power fiber lasers
Author(s): Jayanta Kumar Sahu; Jaesun Kim; Seongwoo Yoo; Andrew Webb; Christophe Codemard; Pascal Dupriez; Yoonchan Jeong; Johan Nilsson; David Richardson; David N. Payne
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Paper Abstract

Fiber lasers and amplifiers offer unique characteristics that are derived from the use of a waveguide and the properties of rare-earth doped silica glass. Their capability for high output power, with high efficiency, has been demonstrated both in CW and pulsed regimes. Cladding-pumped Yb-doped fiber lasers have now reached beyond kW levels with good beam quality. Advances in both fiber technology and high-power multimode diode pump sources, and the inherent power scalability of cladding-pumped fibers, lie behind this power surge. However, there are still many challenges to overcome in the high-power fiber laser area. These include, for example, single-mode output at higher powers and power scaling of a three-level laser. This paper reviews novel W-type fiber and depressed clad hollow optical fiber waveguide structures designed with distributed wavelength filter characteristics to achieve an efficient and high power cladding-pumped three-level lasers such as Nd-doped fiber laser operating at 930 nm and Yb-doped fiber laser at 980 nm. Moreover, such fiber geometries enable to scale up the output power in a small and single-mode core for generating a single-mode output beam in a robust and reliable manner.

Paper Details

Date Published: 2 October 2006
PDF: 7 pages
Proc. SPIE 6389, Active and Passive Optical Components for Communications VI, 638909 (2 October 2006); doi: 10.1117/12.687497
Show Author Affiliations
Jayanta Kumar Sahu, Univ. of Southampton (United Kingdom)
Jaesun Kim, Univ. of Southampton (United Kingdom)
Seongwoo Yoo, Univ. of Southampton (United Kingdom)
Andrew Webb, Univ. of Southampton (United Kingdom)
Christophe Codemard, Univ. of Southampton (United Kingdom)
Pascal Dupriez, Univ. of Southampton (United Kingdom)
Yoonchan Jeong, Univ. of Southampton (United Kingdom)
Johan Nilsson, Univ. of Southampton (United Kingdom)
David Richardson, Univ. of Southampton (United Kingdom)
David N. Payne, Univ. of Southampton (United Kingdom)

Published in SPIE Proceedings Vol. 6389:
Active and Passive Optical Components for Communications VI
Achyut K. Dutta; Yasutake Ohishi; Niloy K. Dutta; Jesper Moerk, Editor(s)

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