Simulating the effects of refractive index difference on the coupling efficiency of periodically segmented waveguide mode converter

• Autorzy: Zheng Yu , He Hao , Jiang Lianqiong , Duan Ji'an

Identyfikatory

DOI

10.37190/oa210408

• Języki publikacji: EN

Abstrakty

EN

Efficient coupling of micro/nano-optical waveguides with single-mode fibers is the premise for the efficient operation of the integrated photonic chip, which directly determines its optical performance. In this paper, the design principles of periodically segmented waveguide (PSW) structure used for high-efficiency fiber-chip coupling are proposed, and the effects of refractive index difference Δ on coupling efficiency and structural parameters are studied by simulation. It is found that as the Δ of the PSW increases, the period of the PSW tends to be smaller, and the coupling efficiency decreases continuously, reduced by around 0.673 dB in the range of Δ = 3% to Δ = 7%. Through the analysis of PSW optical mechanisms, it demonstrates that the main reason for the decrease of coupling efficiency is that the transmission loss of the tapered section increases sharply with the increase of Δ. High-Δ PSW is difficult to apply to highly integrated silica optical chips due to the unignorably insertion loss.

Słowa kluczowe

EN

coupling efficiency; silica waveguide; planar lightwave circuit; micro-optical waveguide; nano-optical waveguide

• Wydawca: Oficyna Wydawnicza Politechniki Wrocławskiej
• Czasopismo: Optica Applicata
• Rocznik: 2021
• Tom: Vol. 51, nr 4
• Strony: 565--577
• Opis fizyczny: Bibliogr. 28 poz., rys.

Twórcy

autor

Zheng Yu

• State Key Laboratory of High Performance Complex Manufacturing, College of Mechanical and Electrical Engineering, Central South University, Changsha, Hunan, 410083, China

autor

He Hao

• State Key Laboratory of High Performance Complex Manufacturing, College of Mechanical and Electrical Engineering, Central South University, Changsha, Hunan, 410083, China

autor

Jiang Lianqiong

• State Key Laboratory of High Performance Complex Manufacturing, College of Mechanical and Electrical Engineering, Central South University, Changsha, Hunan, 410083, China

autor

Duan Ji'an

• State Key Laboratory of High Performance Complex Manufacturing, College of Mechanical and Electrical Engineering, Central South University, Changsha, Hunan, 410083, China

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