Simultaneous measurement of refractive index and temperature using a microring resonator

被引：12
|
作者：
Lin, Nai [1 ]
Jiang, Lan [1 ]
Wang, Sumei [1 ]
Yuan, Lei [1 ]
Chen, Qianghua [1 ]
机构：
[1] Beijing Inst Technol, Laser Micro Nano Fabricat Lab, Sch Mech Engn, Beijing 100081, Peoples R China
来源：
CHINESE OPTICS LETTERS | 2012年 / 10卷 / 05期
基金：
中国国家自然科学基金;
关键词：
WHISPERING-GALLERY MODES; OPTICAL RING-RESONATOR; SENSOR;
D O I：
10.3788/COL201210.052802
中图分类号：
O43 [光学];
学科分类号：
070207 ; 0803 ;
摘要：
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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页数：4
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