The physics of transverse mode instability-induced nonlinear phase distortions in large area optical fiber amplifiers and their mitigation with applications in scaling of pulsed and continuous wave high-energy lasers
Abstract
During the reporting period, the PI investigated the use of vortex beams to mitigate thermal mode instability in high energy fiber amplifiers. The investigation is 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.
Document Details
- Document Type
- Technical Report
- Publication Date
- Dec 13, 2016
- Accession Number
- AD1033042
Entities
People
- Anil Prabhakar
- Balaji Srinivasan
- Deepa Venkitesh
Organizations
- Indian Institute of Technology Madras