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Microwave Photonics Systems Based on Whispering-gallery-mode Resonators
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A process to control light in a micro resonator through a coupling modulation by surface acoustic waves.

Guofang Fan1, Yuan Li2, Chunguang Hu3

  • 1Key Laboratory of Photochemical Conversion and Optoelectronic Materials, Technical Institute of Physics and Chemistry, Chinese Academy of Sciences, 100190 Beijing, China.

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|August 4, 2016
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We developed a new method to control light using surface acoustic waves (SAW) in optical micro-resonators. This novel acousto-optic modulator technology shows promise for advanced photonic devices.

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Area of Science:

  • Photonics and Materials Science
  • Optoelectronics
  • Acousto-Optics

Background:

  • Optical micro-resonators are key components in photonic integrated circuits.
  • Controlling light modulation efficiently is crucial for optical communication and sensing.
  • Surface Acoustic Wave (SAW) devices offer a promising avenue for tunable optical components.

Purpose of the Study:

  • To introduce a novel process for light modulation via SAW coupling in optical micro-resonators.
  • To investigate the mechanism of acousto-optic modulation in a racetrack resonator.
  • To demonstrate the feasibility of SAW-based optical modulation.

Main Methods:

  • Utilized silicon-on-insulator (SOI) technology for a racetrack resonator optical waveguide modulator.
  • Employed the finite-difference time-domain (FDTD) method for simulating the acousto-optic (AO) modulator.
  • Developed an analytical method to validate the simulation results and proposed mechanism.

Main Results:

  • Successfully simulated the acousto-optic modulation process using FDTD.
  • The analytical method confirmed the proposed mechanism's effectiveness.
  • Demonstrated that the novel process effectively modulates light using SAW.

Conclusions:

  • The presented novel process enables effective light control through SAW-induced coupling modulation.
  • This acousto-optic modulator design is viable for practical applications in photonics.
  • The study validates the use of SOI racetrack resonators for SAW-based optical modulation.