@inproceedings{3dd3dc836dd1436487706a67fbc8f8fb,
title = "Whispering Gallery Modes silica resonators - a platform for optical sensing",
abstract = "Optical Whispering Gallery Mode (WGM) microresonators are an ideal platform for miniature and high sensitive sensors. They exhibit very small mode volumes and extremely high Q factors of the order of 106 - 109 providing a platform with low nonlinearity thresholds and low detection limits to environmental changes. Here we present and discuss some of the WGM-based applications we have been developing in our lab. Specifically, we present a WGM strain sensor based on a silica stretchable microsphere, with a Q factor of 108. Tension stress is applied along a microsphere with two fiber tails by pulling on one tail. Consequently, the microsphere's WGMs are shifted and the measurement may serve as a strain sensor. Based on this strain sensor, a WGM magnetic sensor is suggested where the mechanical response of a magnetostrictive material to a varying magnetic field applies the tension stress. In addition, a narrow linewidth laser source for these sensors is described here as well, where a multimode diode laser is locked to a single WGM of the microsphere via self-injection feedback from the microsphere. This optical locking is accompanied with a substantial spectral narrowing of the multimode diode laser.",
keywords = "Magnetic sensor, Mechanical tuning, Microsphere, Optical laser locking, Whispering Gallery Modes",
author = "Eyal Yacoby and Yosef London and Yekutiel Meshorer and Sharone Goldring and Chana Goren and Shaul Pearl",
note = "Publisher Copyright: {\textcopyright} 2022 SPIE.; Fiber Lasers and Glass Photonics: Materials through Applications III 2022 ; Conference date: 09-05-2022 Through 20-05-2022",
year = "2022",
month = jan,
day = "1",
doi = "10.1117/12.2617749",
language = "English",
series = "Proceedings of SPIE - The International Society for Optical Engineering",
publisher = "SPIE",
editor = "Maurizio Ferrari and Seddon, \{Angela B.\} and Stefano Taccheo and Stefano Taccheo",
booktitle = "Fiber Lasers and Glass Photonics",
address = "United States",
}