18 March 2013 Observation of laser beam profile progression inside an extended laser cavity
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Abstract
This report presents the result of the laser beam profile progression in target-in-the-loop (TIL) system. This simulation experiment is to verify whether it is possible to form a tight hot spot similar to a single transversal mode in an extended laser cavity. Therefore, it is very important to observe the progression of the laser profile at a laser cavity mirror when a seeded high energy laser pulse is injected into the TIL system. The extended laser cavity is formed with a high reflectivity mirror on one end and an optical phase conjugated mirror as the second mirror, with potential disturbance media inside. The laser oscillation occurs only when it is triggered with a single frequency high energy laser pulse to overcome the threshold condition. With a laser cavity length of around 11 meters and a seeded laser pulse of 10 ns, we have been able to acquire and distinguish the laser beam profiles of each round-trip. Inserting a scattering media and other distortion elements can simulate atmospheric effects.
© (2013) COPYRIGHT Society of Photo-Optical Instrumentation Engineers (SPIE). Downloading of the abstract is permitted for personal use only.
Frank F. Wu, Frank F. Wu, Thomas C. Farrell, Thomas C. Farrell, "Observation of laser beam profile progression inside an extended laser cavity", Proc. SPIE 8599, Solid State Lasers XXII: Technology and Devices, 85991Z (18 March 2013); doi: 10.1117/12.2003091; https://doi.org/10.1117/12.2003091
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