DocumentCode :
518540
Title :
Fabrication of the novel multi-D-shape fiber sensor by femtosecond laser machining with the diffractive optical element
Author :
Chen, Chien-Hsing ; Tang, Jaw-Luen ; Wu, Wei-Te
Author_Institution :
Dept. of Phys., Nat. Chung Cheng Univ., Chiayi, Taiwan
fYear :
2010
fDate :
5-7 May 2010
Firstpage :
382
Lastpage :
386
Abstract :
A novel class of multi-D-shaped optical fiber suited for refractive index measurement is presented. The multi-D-shaped optical fiber was constructed by forming three D-shaped sections in a multimode optical fiber at localized regions with femtosecond laser pulses by diffractive optical element. Each D-shaped zone covered a sensor volume of 100 μm depth, 250 μm width, and 1 mm length, and the total length for sensing external medium was 3 mm. The mean roughness of the core surface obtained by the AFM images was 214.7 nm, which is relatively smooth. Results of the tensile test indicated that the fibers have sufficient mechanical strength to resist damage from further processing. The multi-D-shaped optical fiber as a high sensitive refractive-index sensor to detect changes in the surrounding refractive index was studied. The results for different concentrations of sucrose solution show that a resolution of 1.27×10-3 RIU is achieved for refractive indices in the range of 1.333 to 1.403, suggesting that the multi-D-shaped fibers are attractive for chemical, biological, and biochemical sensing with aqueous solutions.
Keywords :
diffractive optical elements; fibre optic sensors; laser beam machining; mechanical strength; optical fibre fabrication; refractive index measurement; AFM images; diffractive optical element; fabrication; femtosecond laser machining; mechanical strength; multi-D-shape fiber sensor; multi-D-shaped optical fiber; multimode optical fiber; refractive index measurement; size 1 mum; size 100 mum; size 250 mum; Biomedical optical imaging; Fiber lasers; Machining; Optical device fabrication; Optical diffraction; Optical fiber sensors; Optical fibers; Optical refraction; Optical sensors; Ultrafast optics;
fLanguage :
English
Publisher :
ieee
Conference_Titel :
Design Test Integration and Packaging of MEMS/MOEMS (DTIP), 2010 Symposium on
Conference_Location :
Seville
Print_ISBN :
978-1-4244-6636-8
Electronic_ISBN :
978-2-35500-011-9
Type :
conf
Filename :
5486459
Link To Document :
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