Accession Number : ADA524631


Title :   High Extinction Ratio In-Fibre Polarisers by Exploiting Tilted Fibre Bragg Grating Structures for Single-Polarisation High-Power Fibre Lasers and Amplifiers


Descriptive Note : Final rept. 1 Nov 2007-22 Jul 2010


Corporate Author : ASTON UNIV BIRMINGHAM (UNITED KINGDOM) PHOTONICS RESEARCH GROUP


Personal Author(s) : Zhang, Lin


Full Text : https://apps.dtic.mil/dtic/tr/fulltext/u2/a524631.pdf


Report Date : Nov 2009


Pagination or Media Count : 41


Abstract : This report results from a contract tasking Aston University as follows: This is a follow-on proposal to our previous project of High extinction ratio in-fibre polarisers by exploiting tilted fibre Bragg grating structures for single-polarisation high-power fibre lasers and amplifiers awarded by EOARD (FA8655-06-1-3068) in September 2006. The scientific findings from this project have given rise to new scope for further R&D on high-function in-fibre polarisation devices in speciality fibres. These new devices may have the potential for implementing novel in-fibre optical isolators and polarisation controllers to be used for coherent beam combining fibre laser and amplifier systems. In order to facilitate the two new AFRL projects - (1) In-fibre optical isolator for high-power operation and (2) Self-organisation for polarisation and coherent beam combination of fibre lasers, proposed respectively by Dr. Gerry Moore and Dr. Tim Newell of AFRL, we propose here to develop high-function in-fibre polarisation devices by exploiting tilted grating structures in high birefringent (hi-bi) and Yb-doped fibres, including both conventional and AFRL project specific types. The specially designed, fabricated and optimised tilted grating devices will be delivered to AFRL for evaluation and finally for integration to their high-power operation in-fibre optical isolator and coherent beam combining systems.


Descriptors :   *HIGH POWER , *FIBER OPTICS , SELF ORGANIZING SYSTEMS , BEAMS(RADIATION) , AMPLIFIERS , PHOTOSENSITIVITY , LASERS , POLARIZATION , GRATINGS(SPECTRA)


Subject Categories : Lasers and Masers
      Fiber Optics and Integrated Optics


Distribution Statement : APPROVED FOR PUBLIC RELEASE