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Proceedings Paper

1940 nm all-fiber Q-switched fiber laser
Author(s): P. Ahmadi; A. Estrada; N. Katta; E. Lim; A. McElroy; T. E. Milner; V. Mokan; M. Underwood
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Paper Abstract

We present development of a nanosecond Q-switched Tm3+-doped fiber laser with 16 W average power and 4.4 kW peak power operating at 1940 nm. The laser has a master oscillator power amplifier design, and uses large mode area Tm3+-doped fibers as the gain medium. Special techniques are used to splice Tm3+-doped fibers to minimize splice loss. The laser design is optimized to reduce non-linear effects, including modulation instability. Pulse width broadening due to high gain is observed and studied in detail. Medical surgery is a field of application where this laser may be able to improve clinical practice. The laser together with scanning galvanometer mirrors is used to cut precisely around small footprint vessels in tissue phantoms without leaving any visible residual thermal damage. These experiments provide proof-of-principle that this laser has promising potential in the laser surgery application space.

Paper Details

Date Published: 22 February 2017
PDF: 7 pages
Proc. SPIE 10083, Fiber Lasers XIV: Technology and Systems, 100830G (22 February 2017); doi: 10.1117/12.2252195
Show Author Affiliations
P. Ahmadi, Coherent-Nufern Inc. (United States)
A. Estrada, The Univ. of Texas at Austin (United States)
N. Katta, The Univ. of Texas at Austin (United States)
E. Lim, Coherent-Nufern Inc. (United States)
A. McElroy, The Univ. of Texas at Austin (United States)
T. E. Milner, The Univ. of Texas at Austin (United States)
V. Mokan, Coherent-Nufern Inc. (United States)
M. Underwood, Coherent-Nufern Inc. (United States)

Published in SPIE Proceedings Vol. 10083:
Fiber Lasers XIV: Technology and Systems
Craig A. Robin; Ingmar Hartl, Editor(s)

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