• Optics and Precision Engineering
  • Vol. 30, Issue 4, 403 (2022)
Yu YANG, Lei ZHANG, and Keyi WANG*
Author Affiliations
  • Department of Precision Machinery and Precision Instruments, University of Science and Technology of China, Hefei230026, China
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    DOI: 10.37188/OPE.20223004.0403 Cite this Article
    Yu YANG, Lei ZHANG, Keyi WANG. Research on generating broad-spectrum Kerr optical frequency comb and dispersion control based on magnesium fluoride crystal micro-resonator[J]. Optics and Precision Engineering, 2022, 30(4): 403 Copy Citation Text show less

    Abstract

    The controlled dispersion of a magnesium fluoride crystal resonator was studied to optimize the performance of the whispering gallery mode (WGM) resonator and the quality of generated optical frequency combs (OFCs) based on the WGM optical resonator. Firstly, the effect of the edge shape of a MgF2 crystal resonator on the cavity mode field and total dispersion was investigated by theoretical simulation. Thereafter, two kinds of MgF2 crystal resonators were fabricated according to the simulation results, namely plane edge and unilateral wedge types, respectively. The resonator performance detection and crystal resonator optical frequency comb generation systems were established, and the quality factor (Q factor) of the processed MgF2 crystal resonator samples was recorded up to 1.1×108. Finally, the Kerr optical frequency comb, with a wide spectral range of more than 200 nm, was excited in both the planar crystal resonators. The experimental results verified that the edge-wedged micro-resonator structure could effectively compress the mode field and regulate the total dispersion. In addition, a wider spectral range of the OFC could be produced in comparison with the edge-flat micro-resonator.
    Yu YANG, Lei ZHANG, Keyi WANG. Research on generating broad-spectrum Kerr optical frequency comb and dispersion control based on magnesium fluoride crystal micro-resonator[J]. Optics and Precision Engineering, 2022, 30(4): 403
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