Affiliation:
1. South China University of Technology, Zhuhai Institute of Modern Industrial Innovation
2. Guangdong Engineering Technology Research Center of High-Performance Fiber Laser Techniques and Equipment
3. Hengqin Firay Sci-Tech Company Ltd
4. Shanxi Key Laboratory of Advanced Semiconductor Optoelectronic Devices and Integrated Systems and Jincheng Research Institute of Opto-mechatronics Industry
Abstract
An ultrafine electro-optical frequency comb (EOFC) with plentiful comb
teeth is demonstrated. Adopting a single-frequency fiber laser as a
light source, cascade phase modulation based on a sinusoidal signal
and a frequency-time transformation (FTT) signal is executed to
generate the EOFC with high fineness. Meanwhile, a cyclic fast
frequency shifting strategy is introduced to boost the number of comb
teeth and the bandwidth of the EOFC. As a result, an EOFC with 12600
comb lines covering a broad bandwidth from −6.3 GHz to 6.3 GHz is
established, corresponding to an ultrafine comb space of 1 MHz.
Moreover, the power fluctuation of a comb tooth is less than 0.5 dBm.
This state-of-the-art EOFC has significant potential in the field of
precision spectroscopy.
Funder
National Key Research and Development
Program of China
National Natural Science Foundation of
China
Key-Area Research and Development Program
of Guangdong Province
Fundamental Research Funds for the
Central Universities
Leading Talents of Science and Technology
Innovation of Guangdong Special Support Plan
Program
China Postdoctoral Science
Foundation
Basic and Applied Basic Research
Foundation of Guangdong Province
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
Open Project Program of Shanxi Key
Laboratory of Advanced Semiconductor Optoelectronic Devices and
Integrated Systems
Subject
Atomic and Molecular Physics, and Optics