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Title: High-efficiency coupling method of the gradient-index fiber probe and hollow-core photonic crystal fiber
Authors: Wang, Chi
Zhang, Yue
Sun, Jianmei
Li, Jinhui
Luan, Xinqun
Asundi, Anand
Keywords: Hollow-core Photonic Crystal Fiber
GRIN Fiber Probe
Engineering::Mechanical engineering
Issue Date: 2019
Source: Wang, C., Zhang, Y., Sun, J., Li, J., Luan, X., & Asundi, A. (2019). High-Efficiency Coupling Method of the Gradient-Index Fiber Probe and Hollow-Core Photonic Crystal Fiber. Applied Sciences, 9(10), 2073-. doi:10.3390/app9102073
Series/Report no.: Applied Sciences
Abstract: A high-efficiency coupling method using the gradient-index (GRIN) fiber probe and hollow-core photonic crystal fiber (HC-PCF) is proposed to improve the response time and the sensitivity of gas sensors. A coupling efficiency model of the GRIN fiber probe coupled with HC-PCF is analyzed. An optimization method is proposed to guide the design of the probe and five samples of the GRIN fiber probe with different performances are designed, fabricated, and measured. Next, a coupling efficiency experimental system is established. The coupling efficiencies of the probes and single-mode fiber (SMF) are measured and compared. The experimental results corrected by image processing show that the GRIN fiber probe can achieve a coupling efficiency of 80.22% at distances up to 180 μm, which is obviously superior to the value of 33.45% of SMF at the same distance. Moreover, with the increase of the coupling distance, the coupling efficiency of the probe is still higher than that of SMF.
ISSN: 2076-3417
Rights: © 2019 by the Authors. Licensee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY) license (
Fulltext Permission: open
Fulltext Availability: With Fulltext
Appears in Collections:MAE Journal Articles

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