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This paper introduces the design and applications of integrated As2S3 sidewall Bragg gratings on LiNbO3 substrate. The grating reflectance and bandwidth are analyzed with coupled-mode theory. Coupling coefficients are computed by taking overlap integration. Numerical results for uniform gratings, phase-shifted gratings and grating cavities as well as electro-optic tunable gratings are presented. These integrated As2S3 sidewall gratings on LiNbO3 substrate provide an approach to the design of a wide range of integrated optical devices including switches, laser cavities, modulators, sensors and tunable filters.
We demonstrate a smart optical fiber sensor unit to
realize a multi-parameter sensing, including temperature, curvature and strain
or displacement. The sensor unit is composed of a Bragg grating in graded-index
multimode fiber and a Fizeau cavity.
Short Retraction Notice
The paper does not meet the standards of \"Journal of Modern Physics\".
This article has been retracted to straighten the academic record. In making this decision the Editorial Board follows COPE's Retraction Guidelines. Aim is to promote the circulation of scientific research by offering an ideal research publication platform with due consideration of internationally accepted standards on publication ethics. The Editorial Board would like to extend its sincere apologies for any inconvenience this retraction may have caused.
Editor guiding this retraction: Prof. Yang-Hui He (EIC of JMP).？
The full retraction notice in PDF is preceding the original paper, which is marked \"RETRACTED\".