Stabilized Brillouin laser with sub-Hz fundamental linewidth aided by frequency shifted optical injection locking

Author:

Chen Mingzhao12ORCID,Xu Yin12ORCID,Zhang Zhexin12ORCID,Luo Xiaojie12,Bao Hualong12ORCID

Affiliation:

1. School of Optoelectronic Science and Engineering and Collaborative Innovation Center of Suzhou Nano Science and Technology, Soochow University 1 , Suzhou 215006, China

2. Key Lab of Advanced Optical Manufacturing Technologies of Jiangsu Province and Key Lab of Modern Optical Technologies of Education Ministry of China, Soochow University 2 , Suzhou 215006, China

Abstract

Stable laser emission with ultra-narrow linewidth plays an important role in making fundamental scientific breakthroughs. Here, we propose and demonstrate a new technique for the generation of an ultra-narrow linewidth and highly stable laser based on stimulated Brillouin scattering in combination with a frequency-shifted optical injection locking mechanism. The laser performance is characterized via a delayed self-heterodyne interference system, where the white frequency noise floor is ∼20 mHz2/Hz, corresponding to a fundamental linewidth of about 63 mHz. The maximum deviation in the output power is less than 1.5% over more than 10 min. The operation of the laser can be stabilized without the need for active optoelectronic feedback. The scheme presented in this work enables narrow linewidth and stable single-frequency fiber lasers in a robust and efficient way, which has shown promising potential for many applications.

Funder

National Natural Science Foundation of China

Natural Science Research Project of Jiangsu Higher Education Institutions of China

Gusu Youth Leading Talent

Startup Funding of Soochow University

Publisher

AIP Publishing

Subject

Computer Networks and Communications,Atomic and Molecular Physics, and Optics

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