Please use this identifier to cite or link to this item: https://hdl.handle.net/10356/141454
Title: Spectral characteristics and ultrahigh sensitivities near the dispersion turning point of optical microfiber couplers
Authors: Li, Kaiwei
Zhang, Nancy Meng Ying
Zhang, Nan
Zhang, Ting
Liu, Guigen
Wei, Lei
Keywords: Engineering::Electrical and electronic engineering
Issue Date: 2018
Source: Li, K., Zhang, N. M. Y., Zhang, N., Zhang, T., Liu, G., & Wei, L. (2018). Spectral characteristics and ultrahigh sensitivities near the dispersion turning point of optical microfiber couplers. Journal of Lightwave Technology, 36(12), 2409-2415. doi:10.1109/JLT.2018.2815558
Journal: Journal of Lightwave Technology
Abstract: We present a systematic study on the spectral characteristics and ultrahigh sensitivity near the dispersion turning point (DTP) of optical microfiber couplers. Numerical simulations reveal that a DTP exists when the group effective refractive index (RI) difference between the even mode and the odd mode equals zero, where both ultrahigh positive RI sensitivities and negative RI sensitivities can be achieved. The position of the DTP is dependent on the coupler width, and it always exists over the surrounding RI (SRI) range of 1.333-1.41, which enables the ultrasensitive RI sensing in this wide RI range. Then, we studied the interference spectra characteristics around the DTP both theoretically and experimentally. We further experimentally demonstrate ultrahigh sensitivities of 59624 nm/refractive index unit (RIU) and -58470 nm/RIU around the SRI of 1.333 and 26999 nm/RIU and -29267 nm/RIU around the SRI of 1.35, respectively. High figure of merits of 4192 and 5280 are also achieved around the SRI of 1.333 and 1.35, respectively. Finally, utilizing the exceptional RI sensitivity, we demonstrate an ultrasensitive temperature sensor with a negative sensitivity of -15.23 nm/°C and a positive sensitivity of +16.78 nm/°C.
URI: https://hdl.handle.net/10356/141454
ISSN: 0733-8724
DOI: 10.1109/JLT.2018.2815558
Rights: © 2018 IEEE. All rights reserved.
Fulltext Permission: none
Fulltext Availability: No Fulltext
Appears in Collections:EEE Journal Articles

Google ScholarTM

Check

Altmetric


Plumx

Items in DR-NTU are protected by copyright, with all rights reserved, unless otherwise indicated.