Whispering gallery resonators for optical sensing

Ramgopal Madugani; Sho Kasumie; Yong Yang; Jonathan Ward; Fuchuan Lei; Síle Nic Chormaic

doi:10.1117/12.2272457

23 April 2017 Whispering gallery resonators for optical sensing

Ramgopal Madugani, Sho Kasumie, Yong Yang, Jonathan Ward, Fuchuan Lei, Síle Nic Chormaic

Proceedings Volume 10323, 25th International Conference on Optical Fiber Sensors; 103231B (2017) https://doi.org/10.1117/12.2272457
Event: 25th International Conference on Optical Fiber Sensors, 2017, Jeju, Korea, Republic of

Abstract

In recent years, whispering gallery mode devices have extended their functionality across a number of research fields from photonics to sensing applications. Here, we will discuss environmental sensing applications, such as pressure, flow, and temperature using ultrahigh Q-factor microspheres fabricated from ultrathin optical fiber and microbubbles fabricated from pretapered glass capillary. We will discuss device fabrication and the different types of sensing that can be pursued using such systems. Finally, we will introduce the concept of using cavity ring-up spectroscopy to perform dispersive transient sensing, whereby a perturbation to the environment leads to a frequency mode shift, and dissipative transient sensing, which can lead to broadening of the mode, in a whispering gallery mode resonator.

Citation Download Citation

Ramgopal Madugani, Sho Kasumie, Yong Yang, Jonathan Ward, Fuchuan Lei, and Síle Nic Chormaic "Whispering gallery resonators for optical sensing", Proc. SPIE 10323, 25th International Conference on Optical Fiber Sensors, 103231B (23 April 2017); https://doi.org/10.1117/12.2272457

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KEYWORDS

Resonators

Silica

Capillaries

Environmental sensing

Sensing systems

Gas lasers

Glasses

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