Simultaneous measurement of refractive index and temperature using a microring resonator

Nai Lin; Lan Jiang; Sumei Wang; Lei Yuan; Qianghua Chen

doi:10.3788/COL201210.052802

Simultaneous measurement of refractive index and temperature using a microring resonator

Nai Lin, Lan Jiang^*, Sumei Wang, Lei Yuan, Qianghua Chen

^*Corresponding author for this work

School of Mechanical Engineering

Beijing Institute of Technology

Research output: Contribution to journal › Article › peer-review

16 Citations (Scopus)

Abstract

An approach to the simultaneous measurement of refractive-index (RI) and temperature changes using optical ring resonators is proposed and theoretically demonstrated. With a liquid-core silica ring resonator as an example, two different-order whispering gallery modes (WGMs) might differ in not only RI but also temperature sensitivities. Thus, a second-order sensing matrix should be defined based on these WGMs to determine RI and temperature changes simultaneously. The analysis shows that the RI and temperature detection limits can be achieved on the order of 10 ^-7 RI unit and 10 ^-3 K at a wavelength of approximately 780 nm.

Original language	English
Article number	052802
Journal	Chinese Optics Letters
Volume	10
Issue number	5
DOIs	https://doi.org/10.3788/COL201210.052802
Publication status	Published - May 2012

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abstract = "An approach to the simultaneous measurement of refractive-index (RI) and temperature changes using optical ring resonators is proposed and theoretically demonstrated. With a liquid-core silica ring resonator as an example, two different-order whispering gallery modes (WGMs) might differ in not only RI but also temperature sensitivities. Thus, a second-order sensing matrix should be defined based on these WGMs to determine RI and temperature changes simultaneously. The analysis shows that the RI and temperature detection limits can be achieved on the order of 10 -7 RI unit and 10 -3 K at a wavelength of approximately 780 nm.",

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AU - Jiang, Lan

AU - Wang, Sumei

AU - Yuan, Lei

AU - Chen, Qianghua

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AB - An approach to the simultaneous measurement of refractive-index (RI) and temperature changes using optical ring resonators is proposed and theoretically demonstrated. With a liquid-core silica ring resonator as an example, two different-order whispering gallery modes (WGMs) might differ in not only RI but also temperature sensitivities. Thus, a second-order sensing matrix should be defined based on these WGMs to determine RI and temperature changes simultaneously. The analysis shows that the RI and temperature detection limits can be achieved on the order of 10 -7 RI unit and 10 -3 K at a wavelength of approximately 780 nm.

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Simultaneous measurement of refractive index and temperature using a microring resonator

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