• Optoelectronics Letters
  • Vol. 15, Issue 1, 1 (2019)
Kai-he XIE, Xin ZHANG*, Xiao-wei ZHANG, Han JIN, and Jia-wen JIAN
Author Affiliations
  • Faculty of Electrical Engineering and Computer Science, Ningbo University, Ningbo 315211, China
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    Abstract

    In this paper, a slot microring resonator with a piece of spiral feedback waveguide for CH4 sensing application is pro-posed. This sensor is based on silicon-on-insulator (SOI) substrate and with the operation wavelength in mid-infrared region. To reach high sensitivity and good selectivity, slot cross section and spiral feedback waveguide are carefully tailored. The sensor shows ppb-scale trace gas sensing potential and is easy to be packaged in integrated photonics circuits. Calculation results show that the sensitivity reaches 1.4×10-2 dB/ppm and the detection limit achieves 700 ppb in the case of Lspiral=100Lr.
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    XIE Kai-he, ZHANG Xin, ZHANG Xiao-wei, JIN Han, JIAN Jia-wen. A slot microring sensor with feedback spiral waveguide for trace gas CH4 sensing in mid-infrared region[J]. Optoelectronics Letters, 2019, 15(1): 1
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    Received: Jul. 3, 2018
    Accepted: Aug. 2, 2018
    Posted: Jan. 1, 2019
    Published Online: Apr. 11, 2019
    The Author Email: Xin ZHANG (zhangxin_nbu@163.com)