TY - JOUR
T1 - Sensitive refractive index sensor based on an assembly-free fiber multi-mode interferometer fabricated by femtosecond laser
AU - Chen, Pengcheng
AU - Shu, Xuewen
AU - Shen, Fangcheng
AU - Cao, Haoran
N1 - An OSA-formatted open access journal article PDF may be governed by the OSA Open Access Publishing Agreement signed by the author and any applicable copyright laws. Authors and readers may use, reuse, and build upon the article, or use it for text or data mining without asking prior permission from the publisher or the Author(s), as long as the purpose is non-commercial and appropriate attribution is maintained.
PY - 2017/11/27
Y1 - 2017/11/27
N2 - We propose and demonstrate a highly sensitive refractive index (RI) sensor based on a novel fiber-optic multi-mode interferometer (MMI), which is formed with a femtosecond-laser-induced in-core negative refractive index modified line in a standard single mode fiber. The proposed MMI structure is directly written with femtosecond laser in one step, which removes the splicing process needed in conventional MMI fabrication and also significantly improves the robustness. This device exhibits a high sensitivity to surrounding refractive index, with a maximum sensitivity up to 10675.9 nm/RIU at the RI range of 1.4484-1.4513. The distinct advantages of high sensitivity, compact, robust and assembly-free all-fiber structure make it attractive for real physical, chemical and biological sensing.
AB - We propose and demonstrate a highly sensitive refractive index (RI) sensor based on a novel fiber-optic multi-mode interferometer (MMI), which is formed with a femtosecond-laser-induced in-core negative refractive index modified line in a standard single mode fiber. The proposed MMI structure is directly written with femtosecond laser in one step, which removes the splicing process needed in conventional MMI fabrication and also significantly improves the robustness. This device exhibits a high sensitivity to surrounding refractive index, with a maximum sensitivity up to 10675.9 nm/RIU at the RI range of 1.4484-1.4513. The distinct advantages of high sensitivity, compact, robust and assembly-free all-fiber structure make it attractive for real physical, chemical and biological sensing.
UR - http://www.scopus.com/inward/record.url?scp=85035230828&partnerID=8YFLogxK
UR - https://www.osapublishing.org/oe/abstract.cfm?uri=oe-25-24-29896
U2 - 10.1364/OE.25.029896
DO - 10.1364/OE.25.029896
M3 - Article
AN - SCOPUS:85035230828
SN - 1094-4087
VL - 25
SP - 29896
EP - 29905
JO - Optics Express
JF - Optics Express
IS - 24
ER -