DocumentCode :
3653956
Title :
Design and Characteristics of Dual-Core Photonic Crystal Fiber Doppler Differential Velocimeter
Author :
Xuefeng Huang;Guanghua Zheng;Guanjun Zhao;Jiangrong Xu;Weichih Wang;Shengji Li
Author_Institution :
Sch. of Sci., Hangzhou Dianzi Univ., Hangzhou, China
fYear :
2014
Firstpage :
218
Lastpage :
222
Abstract :
We present a study on the design and characteristics of laser Doppler differential velocimeter using a dual-core photonic crystal fiber (DC-PCF). First, the transmission modes and mode interference characteristics of the DC-PCF were investigated both theoretically and experimentally. The results show that higher order modes (LP11) of the dual cores and the cladding modes are excited by an input wavelength of 632 .8nm, which can be cut off by bending the DC-PCF. The independent fundamental modes (LP01) of the two cores are clearly obtained. The mode interference near the distal end of the DC-PCF was observed, and the interference process from the independent faculae to the interaction of two core beams is presented as well. The velocimeter demonstrates a good working distance (~30 μm) and a small measuring volume (~273 .4 μm3), which is well suited for flow measurement in micro-scale fluidic channels. The velocity measurement of seeding particle is successfully demonstrated by observing the frequency modulation and the spacing of the fringe projected interference from the proposed DC-PCF Doppler differential velocimeter. The measurements are verified and in good agreement with the results obtained by the light gate sensor.
Publisher :
ieee
Conference_Titel :
Optomechatronic Technologies (ISOT), 2014 International Symposium on
Type :
conf
DOI :
10.1109/ISOT.2014.59
Filename :
7119423
Link To Document :
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