Strong $\hbox{LP}_{01}$ and $\hbox{LP}_{11}$ Mutual Coupling Conversion in a Two-Mode Fiber Bragg Grating

IEEE Photonics Journal

卷:4

Kit Man Chung¹  Haw-Yaw Tam¹  Zhengyong Liu¹  Chuang Wu¹  Ming-Leung Vincent Tse¹  Alan Pak Tao Lau¹  Florence Y. M. Chan¹  Chao Lu² 

[1] $^{1}$Photonics Research Centre, Department of Electrical Engineering, The Hong Kong Polytechnic University, Kowloon, Hong Kong;

[2] $^{2}$Photonics Research Centre, Department of Electronic and Information Engineering, The Hong Kong Polytechnic University, Kowloon, Hong Kong;

关键词: Fiber Bragg grating;    two-mode fiber;    modal converter;   

DOI  :  10.1109/JPHOT.2012.2204735

来源: DOAJ

【 摘 要 】

A fiber Bragg grating is inscribed in a two-mode fiber using a 193-nm excimer laser and a phase mask. Strong LP₀₁ and LP₁₁ mutual coupling as large as -22.5 dB, which corresponds to a modal conversion efficiency of more than 99%, is experimentally achieved. The intermodal coupling mechanism is theoretically analyzed through a finite element method. This device can be used as a low-cost reflective LP₀₁ ↔ LP₁₁ converter.

【 授权许可】

Unknown