Transverse mode instability suppression using wavefront shaping in multimode fiber amplifiers

Kabish Wisal; Chun-Wei Chen; Hui Cao; A. Douglas Stone

doi:10.1117/12.2649461

9 March 2023 Transverse mode instability suppression using wavefront shaping in multimode fiber amplifiers

Kabish Wisal, Chun-Wei Chen, Hui Cao, A. Douglas Stone

Proceedings Volume 12400, Fiber Lasers XX: Technology and Systems; 124000P (2023) https://doi.org/10.1117/12.2649461
Event: SPIE LASE, 2023, San Francisco, California, United States

Abstract

Transverse Mode Instability (TMI) is one of several nonlinear effects that limit power scaling in high power fiber lasers and amplifiers. We demonstrate that TMI can be effectively suppressed by spreading power in multiple modes of the fiber. We show that the TMI threshold scales linearly with the number of modes, upon equal excitation of modes, caused by smearing of thermally induced refractive index grating. The multimode excitation can be focused to a diffraction limited spot, giving high quality beam with increased TMI threshold. We finally show linear scaling of TMI threshold is maintained upon inclusion of gain saturation.

Conference Presentation

Citation Download Citation

Kabish Wisal, Chun-Wei Chen, Hui Cao, and A. Douglas Stone "Transverse mode instability suppression using wavefront shaping in multimode fiber amplifiers", Proc. SPIE 12400, Fiber Lasers XX: Technology and Systems, 124000P (9 March 2023); https://doi.org/10.1117/12.2649461

ACCESS THE FULL ARTICLE

INSTITUTIONAL
Select your institution to access the SPIE Digital Library.

SELECT YOUR INSTITUTION

PERSONAL
Sign in with your SPIE account to access your personal subscriptions or to use specific features such as save to my library, sign up for alerts, save searches, etc.

PERSONAL SIGN IN

No SPIE Account? Create one

PURCHASE THIS CONTENT

SUBSCRIBE TO DIGITAL LIBRARY

50 downloads per 1-year subscription

Members: $195

Non-members: $335 ADD TO CART

25 downloads per 1 - year subscription

Members: $145

Non-members: $250 ADD TO CART

PURCHASE SINGLE ARTICLE

Includes PDF, HTML & Video, when available