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Proceedings Paper

>10-W fiber laser source with 0.5-5 MHz repetition rate and 0.5-1.5 nsec pulse width
Author(s): Thomas J. Kane; Laura A. Smoliar; Frank Adams; Mark Alan Arbore; David R. Balsley; Mark W. Byer; George E. Conway; William M. Grossman; Gregory Keaton; Jeffrey D. Kmetec; Manuel Leonardo; James J. Morehead; Werner Wiechmann
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Paper Abstract

The trend in micro-machining lasers is toward greater average power and higher repetition rate, in order to increase throughput, with pulse energy and peak power held roughly constant, as determined by the small scale of the feature. At repetition rates beyond 500 kHz, conventional high-power Q-switched Nd lasers will reach fundamental limits. We demonstrated a fiber-based oscillator-amplifier architecture which produces pulse repetition rates in the 0.5 - 5 MHz range and pulse durations in the 0.5 - 1.5 nsec range. The oscillator is a compact (35 cm3 package) passively Q-switched Nd:YVO4 laser oscillating at a single frequency. By amplifying this laser in fiber, we demonstrated 10-W average power at the two wavelengths of 914 nm and 1064 nm. At 1064-nm, Yb-doped large mode area fiber will allow scaling of average power to over 100 Watts, with peak power of tens of kW, in a diffraction-limited beam. Excellent conversion will be possible to visible and UV using the robust nonlinear material LBO. By opening up a new range of repetition rates and pulse lengths, at IR, visible and UV wavelengths, in a high power design that has the packaging and efficiency advantages of fiber, new micro-machining applications may be enabled.

Paper Details

Date Published: 8 October 2004
PDF: 5 pages
Proc. SPIE 5662, Fifth International Symposium on Laser Precision Microfabrication, (8 October 2004); doi: 10.1117/12.596377
Show Author Affiliations
Thomas J. Kane, Lightwave Electronics Corp. (United States)
Laura A. Smoliar, Lightwave Electronics Corp. (United States)
Frank Adams, Lightwave Electronics Corp. (United States)
Mark Alan Arbore, Lightwave Electronics Corp. (United States)
David R. Balsley, Lightwave Electronics Corp. (United States)
Mark W. Byer, Lightwave Electronics Corp. (United States)
George E. Conway, Lightwave Electronics Corp. (United States)
William M. Grossman, Lightwave Electronics Corp. (United States)
Gregory Keaton, Lightwave Electronics Corp. (United States)
Jeffrey D. Kmetec, Lightwave Electronics Corp. (United States)
Manuel Leonardo, Lightwave Electronics Corp. (United States)
James J. Morehead, Lightwave Electronics Corp. (United States)
Werner Wiechmann, Lightwave Electronics Corp. (United States)


Published in SPIE Proceedings Vol. 5662:
Fifth International Symposium on Laser Precision Microfabrication
Isamu Miyamoto; Henry Helvajian; Kazuyoshi Itoh; Kojiro F. Kobayashi; Andreas Ostendorf; Koji Sugioka, Editor(s)

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