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Proceedings Paper

Tandem photonic amplifier employing a pulsed master oscillator fiber power amplifier with programmable temporal pulse shape capability
Author(s): B. W. Baird; X. Peng; W. Ren; D. M. Hemenway; L. Xu; P. Deladurantaye; Y. Taillon
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Paper Abstract

We report on recent advances in the development of a 1064 nm pulsed master oscillator fiber power amplifier (MOFPA) with integrated modulators enabling programmable temporal pulse shapes and its employment in a tandem photonic amplifier. The MOFPA amplifier chain is seeded by a laser diode operated in the CW regime, yielding very stable spectral characteristics that are independent of the pulse repetition rate and pulse shape. The use of 3 GHz integrated LiNbO3 electro-optic modulators in conjunction with high speed digital electronics results in an excellent pulse shaping capability, a fine pulse amplitude stability and high repetition rate operation (100 kHz-1MHz) with fast rise times (<1ns). Energy per pulse of 8-10 μJ with good beam quality characteristics are obtained using advanced large mode area (LMA) fiber designs in the final power amplifier stage. The output is linearly polarized with a spectral bandwidth of < 0.1 nm. When employed in a tandem amplifier configuration, in which the MOFPA output is input to a single-stage, single-pass Nd:YVO4 amplifier pumped by a single 30 W fiber-coupled 808 nm diode, a 600 mW average power at 100 KHz signal input from the MOFPA was amplified to 6 W with faithful amplification of the input temporal pulse profile while achieving excellent beam quality (M2<1.1) and pulse amplitude stability (< ±3%, 3σ). A model of tandem amplifier performance shows good agreement with experimental results and indicates prospective performance of advanced tandem photonic amplifier configurations.

Paper Details

Date Published: 14 February 2008
PDF: 7 pages
Proc. SPIE 6871, Solid State Lasers XVII: Technology and Devices, 68712A (14 February 2008); doi: 10.1117/12.771742
Show Author Affiliations
B. W. Baird, Electro Scientific Industries, Inc. (United States)
X. Peng, Electro Scientific Industries, Inc. (United States)
W. Ren, Electro Scientific Industries, Inc. (United States)
D. M. Hemenway, Electro Scientific Industries, Inc. (United States)
L. Xu, Electro Scientific Industries, Inc. (United States)
P. Deladurantaye, Institut National d'Optique (Canada)
Y. Taillon, Institut National d'Optique (Canada)


Published in SPIE Proceedings Vol. 6871:
Solid State Lasers XVII: Technology and Devices
W. Andrew Clarkson; Norman Hodgson; Ramesh K. Shori, Editor(s)

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