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Proceedings Paper

High-peak power-pulsed single-mode linearly-polarized LMA fiber amplifier and Q-switch laser
Author(s): V. Khitrov; B. Samson; D. Machewirth; D. Yan; K. Tankala; A. Held
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Paper Abstract

We report on the recent progress in the design and development of completely monolithic linearly-polarized pulsed fiber amplifiers seeded by Q-switched fiber laser oscillators. We demonstrate near diffraction limited beam quality with ~ 20 kW peak power (1mJ pulse energy, ~ 45 nsec) pulses and an average power ~ 20 W at 20 kHz repetition rate with linearly polarized (> 17dB PER) output from a simple MOPA design. The laser produces spectrally narrow pulses with ~ 0.5 nm linewidth centered at 1064nm, suitable for various non-linear applications including generation of visible and UV light. The simple MOPA design consists of a monolithic fiber amplifier based on an optimized coil of polarization maintaining large mode area (PM-LMA) fiber with 30 &mgr;m core and low power Q-switched fiber oscillator. Excellent output beam quality is achieved through the mode selectivity of the coiled PM-LMA fiber in the amplifier stage. Such compact and robust fiber lasers are suitable for a variety of applications, such as nonlinear wavelength conversion processes using a variety of nonlinear materials, laser radars, etc.

Paper Details

Date Published: 20 February 2007
PDF: 6 pages
Proc. SPIE 6453, Fiber Lasers IV: Technology, Systems, and Applications, 645305 (20 February 2007); doi: 10.1117/12.712341
Show Author Affiliations
V. Khitrov, Nufern (United States)
B. Samson, Nufern (United States)
D. Machewirth, Nufern (United States)
D. Yan, Nufern (United States)
K. Tankala, Nufern (United States)
A. Held, Nufern (United States)

Published in SPIE Proceedings Vol. 6453:
Fiber Lasers IV: Technology, Systems, and Applications
Donald J. Harter; Andreas Tünnermann; Jes Broeng; Clifford Headley, Editor(s)

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