Affiliation:
1. Guangdong Engineering Technology Research and Development Center of High-Performance Fiber Laser Techniques and Equipments
2. Hengqin Firay Sci-Tech Company Ltd.
3. Jincheng Research Institute of Opto-Mechatronics Industry
Abstract
Aiming at applications like expanding usable wave band of optical telecommunication and preparing Sr optical lattice clocks, a 1627 nm single-frequency fiber laser (SFFL) is demonstrated based on a 7-m-long self-designed Er-doped hybridized glass fiber (EDHF) and a linear cavity configuration with a loop mirror filter (LMF). By inserting a 10-m-long unpumped commercial Er-doped fiber as a dynamic Bragg grating into the LMF, a stable single-longitudinal-mode (SLM) laser with an output power of about 10 mW is obtained. The optical signal-to-noise ratio (OSNR) of SFFL is over 50 dB, and the linewidth is about 3.7 kHz. The measured relative intensity noise (RIN) is less than 140 dB/Hz at frequencies of over 0.5 MHz, and a power variation in 1 h is less than ±0.26%. To our best knowledge, it is the first demonstration of a SFFL operating at the U-band. This 1627 nm SFFL can provide advanced light source technology support for many cutting-edge applications.
Funder
National Natural Science Foundation of China
National Key Research and Development Program of China
Key-Area Research and Development Program of Guangdong Province
Open Project Program of Shanxi Key Laboratory of Advanced Semiconductor Optoelectronic Devices and Integrated Systems
Fundamental Research Funds for the Central Universities
Leading Talents of Science and Technology Innovation of Guangdong Special Support Plan Program
China Postdoctoral Science Foundation
Guangdong Basic and Applied Basic Research Foundation
Young Talent Support Project of Guangzhou Association for Science and Technology
Local Innovative and Research Teams Project of Guangdong Pearl River Talents Program
Guangzhou Basic and Applied Basic Research Foundation
Subject
Atomic and Molecular Physics, and Optics