Accession Number:

AD1028111

Title:

AFOSR Indo-UK -US Joint Physics Initiative for Study of Angular Optical Mode Fiber Amplification

Descriptive Note:

Technical Report,30 Sep 2015,29 Sep 2016

Corporate Author:

UNIVERSITY OF SOUTHAMPTON SOUTHAMPTON United Kingdom

Personal Author(s):

• Nilsson,Johan
• Sahu,Jayanta K.
• Payne,David N.

Report Date:

2017-02-20

Pagination or Media Count:

30.0

Abstract:

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.

Descriptors:

• optical fiber lasers
• high energy
• thermal properties
• amplifiers

Subject Categories:

• Fiber Optics and Integrated Optics

Distribution Statement:

APPROVED FOR PUBLIC RELEASE