Lasers, Fiber Optics, and Communications

Design of a mode-field converter based on a two-core optical fiber with a long-period fiber grating

[+] Author Affiliations
Jin Wei, Ming-Yang Chen

Jiangsu University, Institute of Optoelectronics and Optical Communication Technologies, Xuefu Road No. 301, Zhenjiang, Jiangsu Province 212013, China

Jiangsu Tian Xing Optoelectronics Technology Co. Ltd., New District, Zhenjiang, Jiangsu Province 212132, China

Qian Xiang, Rui Huang

Jiangsu University, Institute of Optoelectronics and Optical Communication Technologies, Xuefu Road No. 301, Zhenjiang, Jiangsu Province 212013, China

Opt. Eng. 55(6), 066110 (Jun 14, 2016). doi:10.1117/1.OE.55.6.066110
History: Received March 16, 2016; Accepted May 23, 2016
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Abstract.  A two-core optical fiber composed of a single-mode core and a few-mode core is proposed. Index-matched coupling between two fundamental modes in two cores can be achieved by applying a long-period fiber grating in the few-mode core. Mode-field conversion between the small mode-field area and the large mode-field area with low loss can be achieved by this configuration. Numerical simulation shows that the operation bandwidth of the mode-field converter can be as large as 36 nm if the insertion loss of the converter should be lower than 0.5 dB. Results show that this structure has higher conversion efficiency and lower cross talk as compared to the scheme of direct connection between the single-mode fiber and the few-mode fiber.

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© 2016 Society of Photo-Optical Instrumentation Engineers

Citation

Jin Wei ; Ming-Yang Chen ; Qian Xiang and Rui Huang
"Design of a mode-field converter based on a two-core optical fiber with a long-period fiber grating", Opt. Eng. 55(6), 066110 (Jun 14, 2016). ; http://dx.doi.org/10.1117/1.OE.55.6.066110


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