发表机构
M. V. Lomonosov Moscow State University（莫斯科国立罗蒙诺索夫大学）
机构由 AI 辅助整理，请以论文原文为准。AI 中文总结
本研究展示了一种基于交错架构的六通道集成光子处理器，通过扩展校准程序在宽光谱范围内实现通用线性变换，实验验证了高保真度并实现了波长路由功能。
AI 中文摘要
可重构光子集成电路使众多领域的应用成为可能。由于能够执行并行计算，它们代表了信号处理的强大平台。在本工作中，我们展示了一种基于六通道通用芯片的光子处理器，该芯片采用飞秒激光直写制造，具有包含多端口分束器的交错架构。我们利用并增强了一种先前演示的针对单个构建模块的校准程序，并将其扩展到完整的六通道干涉仪，在宽光谱范围内重建相应的干涉仪模型。我们通过测量一组100个Haar随机酉矩阵来验证这些模型，在辐射波长910、945和980 nm下，无需器件优化，分别实现了95.9%、98.0%和96.0%的平均幅度保真度。此外，我们在这些波长下实验实现了光谱解复用和复用，路由保真度范围从90.1%到96.5%，总串扰值范围从-9.6到-14.4 dB，证实了所制造的光子处理器在实际波长路由任务中的适用性。
英文摘要
Reconfigurable photonic integrated circuits enable applications in a wide range of fields. They represent a powerful platform for signal processing due to the ability to perform parallel computations. In this work, we demonstrate a photonic processor based on a six-channel universal chip fabricated by femtosecond laser writing with an interlaced architecture comprising multiport beam splitters. We exploit and enhance a previously demonstrated calibration procedure for a single building block, and extend it to a complete six-channel interferometer, reconstructing the corresponding interferometer models over a broad spectral range. We validate them by measuring a set of 100 Haar-random unitary matrices, achieving mean amplitude fidelities of 95.9 %, 98.0 %, and 96.0 % for radiation wavelengths 910, 945, and 980 nm, respectively, without on-device optimization. Furthermore, we experimentally realize spectral demultiplexing and multiplexing at these wavelengths, yielding routing fidelities ranging from 90.1 % to 96.5 % and total crosstalk values ranging from -9.6 to -14.4 dB, confirming the applicability of the fabricated photonic processor to practical wavelength-routing tasks.
Comments18 pages, 15 figures
