title: Dual-pump Kerr Micro-cavity Optical Frequency Comb with varying FSR spacing.
abstract: In this paper, we demonstrate a novel dual-pump approach to generate robust optical frequency comb with varying free spectral range (FSR) spacing in a CMOS-compatible high-Q micro-ring resonator (MRR). The frequency spacing of the comb can be tuned by an integer number FSR of the MRR freely in our dual-pump scheme. The dual pumps are self-oscillated in the laser cavity loop and their wavelengths can be tuned flexibly by programming the tunable filter embedded in the cavity. By tuning the pump wavelength, broadband OFC with the bandwidth of >180 nm and the frequency-spacing varying from 6 to 46-fold FSRs is realized at a low pump power. This approach could find potential and practical applications in many areas, such as optical metrology, optical communication, and signal processing systems, for its excellent flexibility and robustness.
authors.affiliation: State Key Laboratory of Transient Optics and Photonics, Xi'an Institute of Optics and Precision Mechanics (XIOPM), Chinese Academy of Sciences (CAS), Xi'an 710119, China.|University of Chinese Academy of Sciences, Beijing 100049, China.|China-UK Joint Research Center on Micro/Nano photonics, XIOPM of CAS, Xi'an 710119, China.
authors.forename: Weiqiang
authors.initials: W
authors.lastname: Wang
authors.affiliation: Department of Physics and Materials Science, City University of Hong Kong, Hong Kong, China.
authors.forename: Sai T
authors.initials: ST
authors.lastname: Chu
authors.affiliation: State Key Laboratory of Transient Optics and Photonics, Xi'an Institute of Optics and Precision Mechanics (XIOPM), Chinese Academy of Sciences (CAS), Xi'an 710119, China.
authors.forename: Brent E
authors.initials: BE
authors.lastname: Little
authors.affiliation: Department of Physics and Astronomy, University of Sussex, Falmer, Brighton BN1 9QH, UK.
authors.forename: Alessia
authors.initials: A
authors.lastname: Pasquazi
authors.affiliation: State Key Laboratory of Transient Optics and Photonics, Xi'an Institute of Optics and Precision Mechanics (XIOPM), Chinese Academy of Sciences (CAS), Xi'an 710119, China.
authors.forename: Yishan
authors.initials: Y
authors.lastname: Wang
authors.affiliation: State Key Laboratory of Transient Optics and Photonics, Xi'an Institute of Optics and Precision Mechanics (XIOPM), Chinese Academy of Sciences (CAS), Xi'an 710119, China.|China-UK Joint Research Center on Micro/Nano photonics, XIOPM of CAS, Xi'an 710119, China.
authors.forename: Leiran
authors.initials: L
authors.lastname: Wang
authors.affiliation: State Key Laboratory of Transient Optics and Photonics, Xi'an Institute of Optics and Precision Mechanics (XIOPM), Chinese Academy of Sciences (CAS), Xi'an 710119, China.|China-UK Joint Research Center on Micro/Nano photonics, XIOPM of CAS, Xi'an 710119, China.
authors.forename: Wenfu
authors.initials: W
authors.lastname: Zhang
authors.affiliation: State Key Laboratory of Transient Optics and Photonics, Xi'an Institute of Optics and Precision Mechanics (XIOPM), Chinese Academy of Sciences (CAS), Xi'an 710119, China.|China-UK Joint Research Center on Micro/Nano photonics, XIOPM of CAS, Xi'an 710119, China.
authors.forename: Lei
authors.initials: L
authors.lastname: Wang
authors.affiliation: State Key Laboratory of Transient Optics and Photonics, Xi'an Institute of Optics and Precision Mechanics (XIOPM), Chinese Academy of Sciences (CAS), Xi'an 710119, China.|University of Chinese Academy of Sciences, Beijing 100049, China.
authors.forename: Xiaohong
authors.initials: X
authors.lastname: Hu
authors.affiliation: State Key Laboratory of Transient Optics and Photonics, Xi'an Institute of Optics and Precision Mechanics (XIOPM), Chinese Academy of Sciences (CAS), Xi'an 710119, China.|China-UK Joint Research Center on Micro/Nano photonics, XIOPM of CAS, Xi'an 710119, China.
authors.forename: Guoxi
authors.initials: G
authors.lastname: Wang
authors.affiliation: State Key Laboratory of Transient Optics and Photonics, Xi'an Institute of Optics and Precision Mechanics (XIOPM), Chinese Academy of Sciences (CAS), Xi'an 710119, China.|University of Chinese Academy of Sciences, Beijing 100049, China.
authors.forename: Hui
authors.initials: H
authors.lastname: Hu
authors.affiliation: State Key Laboratory of Transient Optics and Photonics, Xi'an Institute of Optics and Precision Mechanics (XIOPM), Chinese Academy of Sciences (CAS), Xi'an 710119, China.|University of Chinese Academy of Sciences, Beijing 100049, China.
authors.forename: Yulong
authors.initials: Y
authors.lastname: Su
authors.affiliation: State Key Laboratory of Transient Optics and Photonics, Xi'an Institute of Optics and Precision Mechanics (XIOPM), Chinese Academy of Sciences (CAS), Xi'an 710119, China.|University of Chinese Academy of Sciences, Beijing 100049, China.
authors.forename: Feitao
authors.initials: F
authors.lastname: Li
authors.affiliation: State Key Laboratory of Transient Optics and Photonics, Xi'an Institute of Optics and Precision Mechanics (XIOPM), Chinese Academy of Sciences (CAS), Xi'an 710119, China.
authors.forename: Yuanshan
authors.initials: Y
authors.lastname: Liu
authors.affiliation: State Key Laboratory of Transient Optics and Photonics, Xi'an Institute of Optics and Precision Mechanics (XIOPM), Chinese Academy of Sciences (CAS), Xi'an 710119, China.
authors.forename: Wei
authors.initials: W
authors.lastname: Zhao