Packaging experiments of arrayed waveguide grating

Zheng, Yu; Li, Jipan; Gao, Piaopiao; Duan, Ji’an; Chen, Bin

doi:10.1016/j.ijleo.2018.04.105

Cited by 3 publications

(1 citation statement)

References 7 publications

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“…Through integrating waveguides [1,2], resonators [3,4], arrayed waveguide grating [5] and other optical processing components on the micro/nano-scale, the integrated photonic chip can realize low-power and small-size on-chip optical function integration. However, because of the small-size characteristics of the waveguide that connects with the optical components to achieve cooperative operation, the large dimensional difference between the fiber mode [6] and the waveguide mode [7,8] makes their coupling difficult, and the inefficient signal transmission between the fiber and the chip becomes a key problem which restricts the performance of the integrated photonic chip. To match the fiber mode with the waveguide mode, a mode conversion structure is usually required in the chip space.…”

Section: Introductionmentioning

confidence: 99%

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

Zheng¹,

He²,

Jiang³

et al. 2021

Optica Applicata

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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.

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