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AFOSR Indo-UK -US Joint Physics Initiative for Study of Angular Optical Mode Fiber Amplification
Technical Report,30 Sep 2015,29 Sep 2016
UNIVERSITY OF SOUTHAMPTON SOUTHAMPTON United Kingdom
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During the above reporting period, the PI investigated the use of vortex beams to mitigate thermal mode instability in high energy fiber amplifiers. The investigation was carried out through 1 the development of a comprehensive model to study and mitigate the onset of thermal mode instability in large mode area fiber amplifiers, and 2 the development of a testbed at IIT Madras to experimentally validate the above results as well as to explore the generation of vortex modes through a spiral phase plate and novel all-fiber fused coupler. Such work has laid the platform to demonstrate the mitigation of thermal mode instability through vortex beam amplification in high energy fiber amplifiers.
APPROVED FOR PUBLIC RELEASE