Recirculation injection by nonlinear gating for high-power laser pulses

Igor Jovanovic; Miro Shverdin; David Gibson; Curtis Brown

doi:10.1117/12.761037

15 February 2008 Recirculation injection by nonlinear gating for high-power laser pulses

Igor Jovanovic, Miro Shverdin, David Gibson, Curtis Brown

Author Affiliations +

Proceedings Volume 6881, Commercial and Biomedical Applications of Ultrafast Lasers VIII; 68810F (2008) https://doi.org/10.1117/12.761037
Event: Lasers and Applications in Science and Engineering, 2008, San Jose, California, United States

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.

Citation Download Citation

Igor Jovanovic, Miro Shverdin, David Gibson, and Curtis Brown "Recirculation injection by nonlinear gating for high-power laser pulses", Proc. SPIE 6881, Commercial and Biomedical Applications of Ultrafast Lasers VIII, 68810F (15 February 2008); https://doi.org/10.1117/12.761037

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