Low-Loss Silica Edge Coupler Based on Cascaded Gratings With Multiple Duty Ratios

IF 2.3 3区工程技术 Q2 ENGINEERING, ELECTRICAL & ELECTRONIC

IEEE Photonics Technology Letters Pub Date : 2024-10-21 DOI:10.1109/LPT.2024.3483902

Manzhuo Wang;Jimin Fang;Tingyu Liu;Zhentao Yao;Chaoyang Sun;Xiaoqiang Sun;Yuanda Wu;Daming Zhang

引用次数: 0

Abstract

A silica edge coupler based on cascaded gratings with four different duty ratios is demonstrated. Finite-difference time-domain method is adopted in the coupler optimization. Ultraviolet photolithography, plasma etching and chemical vapor deposition have been adopted in the coupler preparation. When the refractive index difference between the silica core and cladding layers is 2%, the measured coupling loss is 0.52 dB/facet at the wavelength 1550 nm. The bandwidth with a penalty less than 1 dB/facet exceeds 318 nm (1300 nm - 1507 nm and 1509 nm - 1620 nm). Features of large alignment tolerance promise the edge coupler good potentials on silica platform.

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基于多占空比级联光栅的低损耗二氧化硅边缘耦合器

演示了一种基于级联光栅、具有四种不同占空比的二氧化硅边缘耦合器。耦合器的优化采用了有限差分时域法。耦合器的制备采用了紫外光刻、等离子刻蚀和化学气相沉积等方法。当二氧化硅芯层和包层的折射率差为 2% 时，在波长 1550 nm 处测得的耦合损耗为 0.52 dB/facet。损耗小于 1 dB/facet 的带宽超过 318 nm（1300 nm - 1507 nm 和 1509 nm - 1620 nm）。这种边缘耦合器具有对准容差大的特点，有望在二氧化硅平台上大显身手。

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 Technology Letters 工程技术-工程：电子与电气

CiteScore

5.00

自引率

3.80%

发文量

404

审稿时长

2.0 months

期刊介绍： IEEE Photonics Technology Letters addresses all aspects of the IEEE Photonics Society Constitutional Field of Interest with emphasis on photonic/lightwave components and applications, laser physics and systems and laser/electro-optics technology. Examples of subject areas for the above areas of concentration are integrated optic and optoelectronic devices, high-power laser arrays (e.g. diode, CO2), free electron lasers, solid, state lasers, laser materials'' interactions and femtosecond laser techniques. The letters journal publishes engineering, applied physics and physics oriented papers. Emphasis is on rapid publication of timely manuscripts. A goal is to provide a focal point of quality engineering-oriented papers in the electro-optics field not found in other rapid-publication journals.