NDLI: Optimization of Cladding-Structure-Modified Long-Period-Grating Refractive-Index Sensors

Content Provider	IEEE Xplore Digital Library
Author	Jian Yang Li Yang Chang-Qing Xu Yingfu Li
Copyright Year	1983
Abstract	The cladding-modified long-period-grating (LPG) refractive-index sensors with a high-refractive-index overlay are optimized based on systematical studies on the structure-modified LPG. Dependence of the cladding-mode effective indexes on the parameters of the structure-modified LPG, such as the overlay refractive index (RI), the overlay thickness, the cladding-layer radius, and the ambient RI, as well as the order of cladding mode, are investigated in detail. An optimization procedure based on reducing the cladding radius, keeping the grating period as an adaptive parameter, and employing the HE₁₃ mode notch-wavelength shift is proposed for the LPG RI sensors. By using the proposed optimization method, it is shown that an ambient RI sensitivity as large as 5980 nm/RI can be achieved, representing a threefold sensitivity enhancement, as compared to the best result obtained from the reported structure, in which the high HE₁₇ mode resonate notch wavelength was employed in sensing
Sponsorship	IEEE Lasers and Electro-Optics Society Optical Society of America
Starting Page	372
Ending Page	380
Page Count	9
File Size	839136
File Format	PDF
ISSN	07338724
Volume Number	25
Issue Number	1
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	2007-01-01
Publisher Place	U.S.A.
Access Restriction	One Nation One Subscription (ONOS)
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Optical fiber sensors Thin film sensors Temperature sensors Biosensors Sensor systems Refractive index Gratings Optical refraction Couplings thin film Fiber sensor long-period grating (LPG) refractive-index (RI) sensor
Content Type	Text
Resource Type	Article
Subject	Atomic and Molecular Physics, and Optics

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