2013/07/09 by C. E. Campanella, Campanella, C. E., Caterina Ciminelli +5
Engineering · Physics and Astronomy · #Advanced Fiber Laser Technologies #Advanced Fiber Optic Sensors #FOS: Physical sciences #Optics (physics.optics) #Photonic and Optical Devices #physics.optics
paper · pdf · doi:10.48550/arxiv.1307.2413
The paper has been withdrawn due to the need for further investigation
openalex publication_date 2013/07/09 · arxiv created 2013/07/15 · arxiv updated 2013/07/16 · openalex created_date 2025/10/10 · openalex updated_date 2026/07/28
In this paper we propose a new optical ring resonator with a very high Q-factor, to be used as a basic element in a wide range of physics and engineering applications. We theoretically demonstrate that in large size conventional ring resonators, a value of the Q-factor higher than 109 is achievable by exploiting the band-edge resonances in a waveguiding long period Bragg grating closed loop, excited through a bus waveguide. The dispersion introduced by the Bragg grating is responsible for a reduction in the band edge resonance linewidth, which is inversely proportional to the square of the number of periods of the grating, thus allowing the overall Q-factor to be enhanced. Numerical results show a substantial improvement in the Q-factor, giving a number of order of magnitude higher than that of a conventional large size ring resonator.