Accession Number:

AD1033042

Title:

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

Descriptive Note:

Technical Report,24 Sep 2015,26 Sep 2016

Corporate Author:

Indian Institute of Technology Madras Chennai India

Report Date:

2016-12-13

Pagination or Media Count:

29.0

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.

Subject Categories:

  • Lasers and Masers
  • Fiber Optics and Integrated Optics

Distribution Statement:

APPROVED FOR PUBLIC RELEASE