Theoretical Investigation of Six-Mode Multi/Demultiplexer Based on Fused-Type Multicore Fiber Coupler

• Main Authors: Shoko Nishimoto, Takeshi Fujisawa, Yusuke Sasaki, Hitoshi Uemura, Kunimasa Saitoh
• Format: Article
• Language: English
• Published: IEEE 2016-01-01
• Series: IEEE Photonics Journal
• Subjects: Multicore fiber; mode multi/demultiplexer; mode division multiplexing
• Online Access: https://ieeexplore.ieee.org/document/7460893/
• ISSN: 1943-0655

A six-mode (LP₀₁/LP₁₁ab/LP_21ab/LP₀₂) multi/demultiplexer based on a fused-type multicore fiber coupler is proposed, and the coupling characteristics are investigated. The multi/demultiplex operation is achieved by a phase matching between the desired mode of center core and the LP₀₁ mode of the outer core in the elongated region of the fused-type multicore fiber coupler. From the numerical results based on the beam propagation method, it is found that the coupling efficiencies between the LP₀₁ and LP₁₁/LP₂₁/LP₀₂ modes are more than -0.1 dB, and the crosstalk is lower than -20 dB at the wavelength of 1550 nm.