~1 kilowatt Ytterbium-doped all-solid photonic bandgap fiber laser

Fanting Kong; Guancheng Gu; Thomas W. Hawkins; Maxwell Jones; Joshua Parsons; Monica T. Kalichevsky-Dong; Benjamin Pulford; Iyad Dajani; Liang Dong

doi:10.1117/12.2251261

22 February 2017 ~1 kilowatt Ytterbium-doped all-solid photonic bandgap fiber laser

Fanting Kong, Guancheng Gu, Thomas W. Hawkins, Maxwell Jones, Joshua Parsons, Monica T. Kalichevsky-Dong, Benjamin Pulford, Iyad Dajani, Liang Dong

Author Affiliations +

Proceedings Volume 10083, Fiber Lasers XIV: Technology and Systems; 1008311 (2017) https://doi.org/10.1117/12.2251261
Event: SPIE LASE, 2017, San Francisco, California, United States

Abstract

Transverse mode instability (TMI) has been recognized as a major limit to average power scaling of single-mode fiber laser besides the optical nonlinear effects. One key to mitigate TMI is to suppress the higher-order modes (HOMs) propagation in the optical fiber. By implementing additional cores in the optical fiber cladding, HOMs can be resonantly coupled from the main core to the surrounding cladding cores, leading to better HOMs suppression. Here, we demonstrate an Yb-doped multiple-cladding-resonant all-solid photonic bandgap fiber with a ~60μm diameter core for high power fiber lasers. The fiber has a multiple-cladding-resonant design in order to provide better HOMs suppression. Maximum laser power of 910w is achieved for a direct diode-pumped fiber laser without TMI with a 9m long fiber at 60cm coil diameter, breaking the TMI threshold of 800w that has been observed in large-mode-area PCFs with ~40μm core. This result is limited by fiber end burning due to the un-optimized thermal management. Later experiment demonstrates maximum laser power of 1050w with 90% lasing efficiency versus absorbed pump power in a 8m long fiber coiled at 80cm diameter, limited by the pump source. However, the fiber bending condition needs to be optimized in order to produce a better laser beam quality.

Conference Presentation

Citation Download Citation

Fanting Kong, Guancheng Gu, Thomas W. Hawkins, Maxwell Jones, Joshua Parsons, Monica T. Kalichevsky-Dong, Benjamin Pulford, Iyad Dajani, and Liang Dong "~1 kilowatt Ytterbium-doped all-solid photonic bandgap fiber laser", Proc. SPIE 10083, Fiber Lasers XIV: Technology and Systems, 1008311 (22 February 2017); https://doi.org/10.1117/12.2251261

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