Faraday Effect in High-$Q$ Whispering-Gallery Mode Optical Cavities

Dept. of Electr. & Comput. Eng., Univ. of New Mexico, Albuquerque, NM, USA
IEEE Photonics Journal (Impact Factor: 2.21). 11/2011; 3(5):872 - 880. DOI: 10.1109/JPHOT.2011.2168514
Source: IEEE Xplore


The general theory of Faraday rotation in high- Q whispering-gallery (WG) mode optical cavities is investigated. We have derived a matrix equation for the transmitted optical field through a WG mode optical cavity in a time-independent magnetic field. Using the corresponding mathematical framework, we have studied the behavior of the output power spectrum as a function of the magnetic field strength for a typical WG mode optical cavity. The effects of input polarization, optical quality factor, and cavity diameter on the magnetic response are studied.

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Available from: Mani Hossein-Zadeh, Dec 09, 2014
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    ABSTRACT: A new single-mode optoelectronic oscillator (OEO) with three coupled cavities is proposed and demonstrated. A Fabry-Perot (F-P) cavity fiber laser and an optical-electrical feedback branch are coupled together to construct an optoelectronic oscillator, where the F-P cavity fiber laser serves as a light source, and a modulator is placed in the laser cavity to implement reciprocating modulation, which simultaneously splits the laser cavity into two parts and forms a dual-loop configuration. To complete an optoelectronic oscillator, part of optical signal is output from the F-P cavity to implement the feedback modulation, which constructs the third cavity. Since only the oscillation signal satisfies the requirements of all the three cavities, a single-mode oscillation can be finally achieved. Three resonant cavities are successfully designed without adding more optoelectronic devices, and the side-modes can be well suppressed with low cost. The oscillation condition is theoretically analyzed. In the experimental demonstration, a 20 GHz single longitudinal mode microwave signal is successfully obtained.
    No preview · Article · Jan 2015 · Optoelectronics Letters