Compact Dual-Mode Adiabatic 3-dB Coupler for the 2-µm Waveband on Silicon Using Fast Quasi-Adiabatic Dynamics

IF 2.4 4区工程技术 Q3 ENGINEERING, ELECTRICAL & ELECTRONIC

IEEE Photonics Journal Pub Date : 2025-08-06 DOI:10.1109/JPHOT.2025.3596458

Taichi Muratsubaki;Takanori Sato;Kunimasa Saitoh

引用次数: 0

Abstract

We propose a 2 × 2 dual-mode adiabatic 3-dB coupler for the 2-μm waveband on silicon. The proposed coupler is designed based on fast quasi-adiabatic dynamics. The optimized taper shape is effective to reduce the device length. The length of the coupling region with the optimized taper is at least 3 times shorter than the length of the coupling region with the linear taper. Numerical results indicate that our device with taper length 425 μm provides the excess losses smaller than 0.01 dB and imbalances within ±0.58 dB for both TE0 and TE1 modes in the spectral range of 2.06–2.14 μm. Furthermore, the experimental results demonstrate the functionality of the proposed coupler, and the effectiveness of the design based on fast quasi-adiabatic dynamics. The proposed device is useful for the building of multimode switches in the on-chip mode-division multiplexed network.

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基于快速准绝热动力学的2µm波段硅基紧凑型双模绝热3db耦合器

我们提出了一种2 × 2双模绝热3db耦合器，用于硅基2 μm波段。所提出的耦合器是基于快速准绝热动力学设计的。优化后的锥度形状可以有效地减小装置长度。采用优化锥度的耦合区长度比采用线性锥度的耦合区长度至少短3倍。数值结果表明，在2.06 ~ 2.14 μm的光谱范围内，我们设计的锥度长度为425 μm的器件在TE0和TE1模式下的额外损耗小于0.01 dB，不平衡在±0.58 dB以内。此外，实验结果验证了所提耦合器的功能性，以及基于快速准绝热动力学设计的有效性。该器件可用于在片上模分复用网络中建立多模交换机。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

IEEE Photonics Journal ENGINEERING, ELECTRICAL & ELECTRONIC-OPTICS

CiteScore

4.50

自引率

8.30%

发文量

489

审稿时长

1.4 months

期刊介绍： Breakthroughs in the generation of light and in its control and utilization have given rise to the field of Photonics, a rapidly expanding area of science and technology with major technological and economic impact. Photonics integrates quantum electronics and optics to accelerate progress in the generation of novel photon sources and in their utilization in emerging applications at the micro and nano scales spanning from the far-infrared/THz to the x-ray region of the electromagnetic spectrum. IEEE Photonics Journal is an online-only journal dedicated to the rapid disclosure of top-quality peer-reviewed research at the forefront of all areas of photonics. Contributions addressing issues ranging from fundamental understanding to emerging technologies and applications are within the scope of the Journal. The Journal includes topics in: Photon sources from far infrared to X-rays, Photonics materials and engineered photonic structures, Integrated optics and optoelectronic, Ultrafast, attosecond, high field and short wavelength photonics, Biophotonics, including DNA photonics, Nanophotonics, Magnetophotonics, Fundamentals of light propagation and interaction; nonlinear effects, Optical data storage, Fiber optics and optical communications devices, systems, and technologies, Micro Opto Electro Mechanical Systems (MOEMS), Microwave photonics, Optical Sensors.