Generation of stimulated Brillouin scattering in a packaged CaF2 micro-disk resonator with ultra-high-Q factor

1.Department of Precision Machinery and Precision Instrumentation, University of Science and Technology of China, Hefei 230026, China;2.Key Laboratory of Nondestructive Test of Ministry of Education, Nanchang Hang-kong University, Nanchang 330063, China

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the Fundamental Research Funds for the Central Universities (WK5290000001), the Natural Science Foundation of Jiangxi Province (20202BABL212011)

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    The whispering gallery mode (WGM) micro-resonator is an ideal platform for investigating the nonlinear light phenomenon. In this article, we achieved up to the fifth-order cascaded stimulated Brillouin scattering (SBS) light in a CaF2 micro-disk resonator with an mm-sized 12.6 mm diameter and an ultra-high quality factor ( factor) at 1 550 nm wavelength. We found that there are multi modes of families in our large-scale micro-disk resonator when coupled to an adiabatic tapered fiber, which can easily select resonances matching the SBS frequency shift. This can eliminate the requirement that precisely controlls the scale of the resonator to match the free spectral range (FSR) with the Brillouin frequency shift. During our experiment, to solve the environmental fluctuation problem between the micro-disk resonator and tapered fiber, we designed a packaged platform that can steadily seal the resonator and tapered fiber in an N2 atmosphere. The generated cascaded Brillouin light and the stable packaged platform can further be used to investigate the multi-wavelength Brillouin laser and Brillouin light-based gyroscope.

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YANG Yu, ZHAO Shuai, SHEN Yuan, MENG Ling-Jun, WANG Meng-Yu, ZHANG Lei, WANG Ke-Yi. Generation of stimulated Brillouin scattering in a packaged CaF2 micro-disk resonator with ultra-high-Q factor[J]. Journal of Infrared and Millimeter Waves,2021,40(6):865~869

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  • Received:February 26,2021
  • Revised:December 14,2021
  • Adopted:April 16,2021
  • Online: November 29,2021
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