Simultaneous Measurement of MDL and DMGD in FMFs by Analyzing the Rayleigh Backscattering Amplitudes

IEEE Photonics Journal

Guijun Hu¹  Jiake Chen¹  Weicheng Chen¹  Feng Liu¹  Cuiguang Chen¹  Congcong Song¹ 

[1] College of Communication Engineering, Jilin University, Changchun, China;

关键词: Few mode fiber;    Rayleigh backscattering;    mode dependent loss;    differential modal group delay.;   

DOI  :  10.1109/JPHOT.2019.2901263

来源: DOAJ

【 摘 要 】

In this paper, we propose and experimentally demonstrate a novel method for simultaneously measuring mode-dependent loss (MDL) and differential modal group delay (DMGD) in few mode fibers (FMFs). This method is based on analyzing the Rayleigh backscattering amplitudes obtained with a special nondestructive measurement system. With this method, the MDL and DMGD in about 9.8 km 3-mode fiber are successfully measured, which are 0.186 dB and 3.581 ps/m between LP₀₁ and LP_11a and 0.157 dB and 3.604 ps/m between LP₀₁ and LP_11b, respectively. Then, the experimental results of DMGD and MDL with different methods are compared, which show that the values of DMGD and MDL obtained by the proposed method agree well with that using the time-of-flight (TOF) and conventional transmission methods, respectively. In addition, it is also demonstrated that the proposed scheme can be scalable to measure FMFs with a large number of modes.

【 授权许可】

Unknown