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Proceedings Paper

Recirculation injection by nonlinear gating for high-power laser pulses
Author(s): Igor Jovanovic; Miro Shverdin; David Gibson; Curtis Brown
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Paper Abstract

The average power and efficiency of processes that exhibit low interaction cross section and low optical loss can often be enhanced by recirculating the laser pulse in the cavity. Inverse Compton scattering of the photon pulse on an electron bunch, harmonic generation, and spectroscopy represent examples of such processes. Methods for laser recirculation that enhance the interaction efficiency have been proposed in the past, based on resonant cavity coupling, intracavity amplification, or electro-optical switching. Those methods exhibit limitations such as interferometric alignment accuracies, complexity, and nonlinear phase accumulation. A novel scheme for energetic short laser pulse recirculation, termed recirculation injection by nonlinear gating (RING), is described. RING is based on intracavity nonlinear frequency conversion for optical switching, does not exhibit interferometric alignment constraints, and is scalable to extreme peak power. Initial demonstration of the RING technique is presented at a 1-mJ level, with cavity enhancement factors exceeding 25 in a simple unstable resonator cavity. Applications of the RING technique in biomedical and other applications are outlined.

Paper Details

Date Published: 15 February 2008
PDF: 12 pages
Proc. SPIE 6881, Commercial and Biomedical Applications of Ultrafast Lasers VIII, 68810F (15 February 2008); doi: 10.1117/12.761037
Show Author Affiliations
Igor Jovanovic, Purdue Univ. (United States)
Miro Shverdin, Lawrence Livermore National Lab. (United States)
David Gibson, Lawrence Livermore National Lab. (United States)
Curtis Brown, Lawrence Livermore National Lab. (United States)

Published in SPIE Proceedings Vol. 6881:
Commercial and Biomedical Applications of Ultrafast Lasers VIII
Joseph Neev; Stefan Nolte; Alexander Heisterkamp; Christopher B. Schaffer, Editor(s)

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