Demonstration of spatial mode selection in a coherently combined fiber laser

Erik Tilseth, William M. Kunkel, James R. Leger

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Abstract

Several physical mechanisms influence the self-phasing of passive coherently combined laser systems, including wavelength tuning, the Kramers-Kronig (KK) effect, the optical Kerr effect, regenerative feedback, and spatial mode selection. Beam recycling, a concept introduced in the modal analysis of a Michelson cavity, applies feedback to waste energy from the coherent combination process to introduce a second supermode in the cavity [1]. Experiments using a polarization-multiplexed cavity showed that the output power is less sensitive to gain arm path length changes when beam recycling is used [2]. Self-phasing mechanisms including beam recycling appear to have also been applied in a ring laser array [3]. Here, we present an experiment which isolates the beam recycling effect in a fiber laser with two separate gain media and show improved laser performance when recycling is implemented.

Original languageEnglish (US)
Title of host publicationThe European Conference on Lasers and Electro-Optics, CLEO_Europe_2019
PublisherOSA - The Optical Society
ISBN (Electronic)9781557528209
StatePublished - 2019
EventThe European Conference on Lasers and Electro-Optics, CLEO_Europe_2019 - Munich, Germany
Duration: Jun 23 2019Jun 27 2019

Publication series

NameOptics InfoBase Conference Papers
VolumePart F140-CLEO_Europe 2019

Conference

ConferenceThe European Conference on Lasers and Electro-Optics, CLEO_Europe_2019
CountryGermany
CityMunich
Period6/23/196/27/19

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