Research on generating broad-spectrum Kerr optical frequency comb and dispersion control based on magnesium fluoride crystal micro-resonator

Yu YANG; Lei ZHANG; Keyi WANG

doi:10.37188/OPE.20223004.0403

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Research on generating broad-spectrum Kerr optical frequency comb and dispersion control based on magnesium fluoride crystal micro-resonator

Modern Applied Optics | 更新时间：2022-02-26

- Research on generating broad-spectrum Kerr optical frequency comb and dispersion control based on magnesium fluoride crystal micro-resonator
- Optics and Precision Engineering Vol. 30, Issue 4, Pages: 403-410(2022)
- 作者机构：
  
  中国科学技术大学精密机械与精密仪器系，安徽合肥 230026
- 作者简介：
- 基金信息：
- DOI：10.37188/OPE.20223004.0403
  CLC： O436
- Received：31 August 2021，
  
  Revised：11 October 2021，
  
  Published：25 February 2022
- 稿件说明：
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杨煜,张磊,王克逸.基于氟化镁晶体微腔产生宽光谱范围克尔光频梳及色散调控研究[J].光学精密工程,2022,30(04):403-410.

YANG Yu,ZHANG Lei,WANG Keyi.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(04):403-410.
杨煜,张磊,王克逸.基于氟化镁晶体微腔产生宽光谱范围克尔光频梳及色散调控研究[J].光学精密工程,2022,30(04):403-410. DOI： 10.37188/OPE.20223004.0403.

YANG Yu,ZHANG Lei,WANG Keyi.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(04):403-410. DOI： 10.37188/OPE.20223004.0403.

摘要

为了在基于回音壁模式光学微腔的光学频率梳生成中优化微腔的性能和光频梳的质量，对氟化镁晶体微腔的色散调控进行研究。首先，理论仿真研究了MgF

晶体微腔边缘形状对腔内模场和总色散的影响；接着根据仿真结果实际加工了两种面形的MgF

晶体微腔，分别为边缘平面型和单边楔形；然后，搭建了微腔性能检测系统和晶体微腔光梳生成系统，实测加工出的MgF

晶体微腔样品的品质因子（Q值）最高可达

http://html.publish.founderss.cn/rc-pub/api/common/picture?pictureId=24669648&type=

http://html.publish.founderss.cn/rc-pub/api/common/picture?pictureId=24669644&type=

12.36133385

2.62466669

；最后在加工的两种面形晶体腔中均有效激发了超过200 nm的宽光谱范围的克尔光频梳。实验结果验证了边缘楔形的微腔结构确实能够有效压缩模场并调控总色散，相比于边缘平面型的微腔能够产生更宽光谱范围的光梳。

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 MgF

crystal resonator on the cavity mode field and total dispersion was investigated by theoretical simulation. Thereafter， two kinds of MgF

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 MgF

crystal resonator samples was recorded up to

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13.20800018

2.62466669

. 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.

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