Optimization of random FBG array in multimode graded-index fiber for Raman lasing with improved spatio-spectral characteristics

A. G. Kuznetsov; A. A. Wolf; Zh. E. Munkueva; A. V. Dostovalov; S. A. Babin

doi:10.1117/12.2689180

27 November 2023 Optimization of random FBG array in multimode graded-index fiber for Raman lasing with improved spatio-spectral characteristics

A. G. Kuznetsov, A. A. Wolf, Zh. E. Munkueva, A. V. Dostovalov, S. A. Babin

Author Affiliations +

Proceedings Volume 12760, Advanced Lasers, High-Power Lasers, and Applications XIV; 127600L (2023) https://doi.org/10.1117/12.2689180
Event: SPIE/COS Photonics Asia, 2023, Beijing, China

Abstract

We report on the optimization of femtosecond-pulse inscribed arrays of short randomly spaced FBGs for Raman lasing in multimode GRIN fiber pumped by highly multimode (M² ~34) 940-nm diodes. The fabricated 1D-3D FBG arrays used as a complex output mirror together with input highly reflective FBG provide random lasing of the Stokes beam at 976 nm with output power around 30 W. The optimization of array structure results in beam quality improvement to M² ⪅2 and the linewidth narrowing to 0.1 nm to 0.2 nm that is better than that for long regular FBG of comparable reflection. Potential of such cavity structure for further parameter improvement and its practical applications are discussed.

Citation Download Citation

A. G. Kuznetsov, A. A. Wolf, Zh. E. Munkueva, A. V. Dostovalov, and S. A. Babin "Optimization of random FBG array in multimode graded-index fiber for Raman lasing with improved spatio-spectral characteristics", Proc. SPIE 12760, Advanced Lasers, High-Power Lasers, and Applications XIV, 127600L (27 November 2023); https://doi.org/10.1117/12.2689180

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