Design and Characteristics of Dual-core Photonic Crystal Fiber Doppler Differential Velocimeter

被引：0
|
作者：
Huang, Xuefeng [1 ]
Zheng, Guanghua [1 ]
Zhao, Guanjun [1 ]
Xu, Jiangrong [1 ]
Li, Shengji [2 ]
Wang, Weichih [3 ]
机构：
[1] Hangzhou Dianzi Univ, Sch Sci, Hangzhou, Zhejiang, Peoples R China
[2] Hangzhou Dianzi Univ, Coll Mat & Environm Engn, Hangzhou, Zhejiang, Peoples R China
[3] Univ Washington, Dept Mech Engn, Seattle, WA 98195 USA
来源：
PROCEEDINGS OF 2014 INTERNATIONAL SYMPOSIUM ON OPTOMECHATRONIC TECHNOLOGIES (ISOT) | 2014年
基金：
中国国家自然科学基金;
关键词：
dual-core photonic crystal fiber; laser doppler velocimeter; frequency modulation; mode interference; COUPLING CHARACTERISTICS; OPTICAL-FIBER; PROBE;
D O I：
10.1109/ISOT.2014.59
中图分类号：
TM [电工技术]; TN [电子技术、通信技术];
学科分类号：
0808 ; 0809 ;
摘要：
We present the design and characteristics of laser Doppler differential velocimeter using a dual-core photonic crystal fiber (DC-PCF). Transmission modes and mode interference characteristics of DC-PCF were investigated. Results show that higher order modes and cladding modes are excited, which can be cut off by bending the DC-PCF. The independent fundamental modes of two cores are clearly obtained. The mode interference near the distal end of DC-PCF was observed, and the interference process from independent faculae to the interaction of two core beams is presented. The velocimeter demonstrates a good working distance (similar to 30 m) and a small measuring volume (similar to 273.4 m(3)), which is well suited for flow measurement in micro-scale fluidic channels. The velocity measurement is successfully demonstrated by observing the frequency modulation and the spacing of the fringe projected interference. The measurements are verified and in good agreement with the results obtained by the light gate sensor.
引用
收藏
页码：218 / 222
页数：5
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