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Simultaneous spectral recovery of long-period grating sensor array using optical time-division multiplexing |
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| Authors: | HS Lin MR Mokhtar FA Rahman HA Abdul Rashid M Roslina NAM Arif |
| Institution: | 1. Optical Networks and Systems Group, Faculty of Engineering, Multimedia University, 63100, Cyberjaya, Selangor, Malaysia;2. Department of Electrical and Electronic Engineering, Faculty of Engineering and Science, Universiti Tunku Abdul Rahman, 53300, Setapak, Kuala Lumpur, Malaysia;3. College of Engineering, Department of Engineering Sciences and Mathematics, Universiti Tenaga Nasional, 43000 Kajang, Selangor, Malaysia |
| Abstract: | A novel sensor network based on optical time-division multiplexing (OTDM) is proposed and demonstrated for simultaneous sensing of long-period grating (LPG) sensor array with overlapping spectra. A star network is configured by pairing a circulator with each of the LPG sensors. Experiments are conducted by measuring the changes of surrounding refractive index at different sensors, which show excellent agreement between the demultiplexed and pristine transmission spectrum of the LPG sensors. |
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