具有梯形空气槽的 4×4 MMI 热光开关的优化设计。

Optimal design of a 4 × 4 MMI thermal optical switch with trapezoidal air trenches.

出版信息

Appl Opt. 2023 Feb 20;62(6):1521-1527. doi: 10.1364/AO.482133.

Abstract

Optical switches are important in signal routing and switching. In this paper, a thermal optical switch with trapezoidal air trenches is proposed. The proposed structure consists of two cascaded 4×4 multimode interference (MMI) couplers. The beam propagation method is used to optimize the dimension and analyze the characteristics. Simulation results show excess loss (EL) and insertion loss (IL) are less than 0.14 dB and 0.22 dB at the wavelength of 1550 nm, respectively. Besides, the extinction ratio (ER) is higher than 21 dB. This design has the advantages of small size, low loss, and high flexibility, which is promising for application to all-optical network routing.

摘要

光开关在信号路由和切换中起着重要的作用。本文提出了一种具有梯形空气槽的热光开关。该结构由两个级联的 4×4 多模干涉（MMI）耦合器组成。采用光束传播法优化尺寸并分析特性。仿真结果表明，在 1550nm 波长处，其附加损耗（EL）和插入损耗（IL）分别小于 0.14dB 和 0.22dB。此外，消光比（ER）大于 21dB。该设计具有尺寸小、损耗低、灵活性高的优点，有望应用于全光网络路由。