Optical bottle microresonators: Cleaning-up the spectral mess

Zervas, M.N.

doi:10.1109/icton.2012.6253728

Cited by 1 publication

(1 citation statement)

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“…However, this spectral dense characteristic can be an obstacle for the implementation of bottle resonators as sensing structures. Despite this fact, filtering methods of WGMs in glass bottle resonators have been proposed and experimentally explored by accurately placing high-index liquid drops and creating micro-scars on the bottle surface via high-precision focused ion beam milling [15]. The cleaner spectrum shows WGM resonances with quality (Q) factors of 10 7 for high-index dropped bottles and Q ~ 10 5 for microstructured bottles.…”

Section: Introductionmentioning

confidence: 99%

Experimental Demonstration of Temperature Sensing with Packaged Glass Bottle Microresonators

Herter

Wunderlich

Janeczka

et al. 2018

Sensors

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Whispering gallery mode (WGM) glass bottle microresonators are potential highly sensitive structures for a variety of physical and bio-chemical sensing applications. In this paper, we experimentally demonstrate the practical use of glass bottle resonators as temperature sensors. The basic parameters, such as WGM resonance wavelengths, free spectral ranges, and Q factors, have been investigated by coupling light from a tapered fiber to the bottle structure. We show the spectral characteristics of the WGMs by choosing different bottle dimensions and taper diameters. For practical measurements, a robust 3D-printed package that includes the bottle resonator and the tapered fiber has been proposed. The packaged bottle has a central diameter Dc = 207 µm and a length L = 300 µm. Temperature sensing experiments were also performed. A linear response of the WGM shifts as a function of the temperature is confirmed. The fitted experimental data indicate a temperature sensitivity of 10.5 pm/K at λ ~ 1550 nm, resulting in a limit of detection of 0.06 K. These values can be compared with values reported for other WGM resonators. Additionally, bottle resonators are made with simple splicing methods and their assembly method can be easily defined due to large coupling tolerances.

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Section: Introductionmentioning

confidence: 99%