Bending characteristics of dual-hole PM-PCF based on LP<sub>01</sub> and LP<sub>11</sub> modal interference

Xuan Guo; Feng Liu; Meng-yuan Gao; Ai-ling Tan; Xing-hu Fu; Wei-hong Bi

doi:10.1007/s11801-016-6002-9

Optoelectronics Letters ›› , Vol. 12 ›› Issue (2) : 136-139. DOI: 10.1007/s11801-016-6002-9

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Bending characteristics of dual-hole PM-PCF based on LP₀₁ and LP₁₁ modal interference

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Abstract

The bending characteristics of dual-hole polarization maintaining photonic crystal fiber (PM-PCF) are demonstrated in this paper. The modal interference is induced by the LP₀₁ mode and LP₁₁ mode propagating in a single PM-PCF with the same polarization direction. Simulation results demonstrate that the bending radius induces the phase difference between LP₀₁ mode and LP₁₁ mode, which leads to the change of light interference intensity on the fiber output facet. The relationship between bending radius and normalized interference intensity with three different bending angles is discussed, where the bending angle is defined as the angle between hole axis and the x axis. The bending sensitivity is obtained to be about −188.78/m around the bending radius of 1.5 cm with the bending angle of 90°. The bending characteristics can contribute for online bending detection in widespread areas.

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Xuan Guo, Feng Liu, Meng-yuan Gao, Ai-ling Tan, Xing-hu Fu, Wei-hong Bi. Bending characteristics of dual-hole PM-PCF based on LP₀₁ and LP₁₁ modal interference. Optoelectronics Letters, , 12(2): 136‒139 https://doi.org/10.1007/s11801-016-6002-9

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This work has been supported by the National Natural Science Foundation of China (No.61475133), the Hebei Provincial Natural Science Foundation (No.F2015203270), the Yanshan University Doctor Foundation (No.B872), the Yanshan University Youth Foundation (No.14LGB015), the College Youth Talent Project of Hebei Province (No.BJ2014057), and the Hebei Educational Committee Natural Science Youth Fund (No.QN2014034).