Single-frequency hybrid Brillouin-thulium fiber laser with kilohertz linewidth

Chaodu Shi; Quan Sheng; Shijie Fu; Shuai Sun; Junxiang Zhang; Wei Shi; Jianquan Yao

doi:10.1117/12.2544130

21 February 2020 Single-frequency hybrid Brillouin-thulium fiber laser with kilohertz linewidth

Chaodu Shi, Quan Sheng, Shijie Fu, Shuai Sun, Junxiang Zhang, Wei Shi, Jianquan Yao

Proceedings Volume 11260, Fiber Lasers XVII: Technology and Systems; 112600W (2020) https://doi.org/10.1117/12.2544130
Event: SPIE LASE, 2020, San Francisco, California, United States

Abstract

Stimulated Brillouin scattering (SBS) is a well established method to narrow the laser linewidth to kilohertz level, which however suffers high threshold due to the low SBS gain at the region of 2 μm. The hybrid Brillouin/thulium fiber laser (BTFL) is such an approach which could suppress the laser linewidth with low threshold and high efficiency. In this paper, an ultra-narrow linewidth hybrid Brillouin/thulium fiber laser (BTFL) was demonstrated. Through experimentally optimizing the output coupling, pump scheme, Brillouin pump power and cavity length of the laser, 344-mW laser output with a narrow linewidth of 0.93 kHz was obtained, in which the linewidth of Stokes light was suppressed more than 43 times compared with the 40 kHz linewidth of the Brillouin pump. Besides, the influences of output coupling and pump scheme on the power and linewidth behavior of a single-frequency BTFL were also experimentally investigated, and there exists a performance balance among linewidth narrowing, output power and SBS threshold. The BTFL output power was further boosted to 5.5 W by a one-stage cladding-pumped fiber amplifier, and the corresponding spectral linewidth was broadened to 1.93 kHz. The output coupling exerted a significant influence on the BTFL performance.

Citation Download Citation

Chaodu Shi, Quan Sheng, Shijie Fu, Shuai Sun, Junxiang Zhang, Wei Shi, and Jianquan Yao "Single-frequency hybrid Brillouin-thulium fiber laser with kilohertz linewidth", Proc. SPIE 11260, Fiber Lasers XVII: Technology and Systems, 112600W (21 February 2020); https://doi.org/10.1117/12.2544130

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