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arXiv 2407.02207quant-phphysics.app-phphysics.optics
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大规模光子集成电路的全局校准

Global calibration of large-scale photonic integrated circuits

Jin-Hao Zheng, Qin-Qin Wang, Lan-Tian Feng, Yu-Yang Ding, Xiao-Ye Xu, Xi-Feng Ren, Chuan-Feng Li, Guang-Can Guo

AI总结:

针对大规模光子集成电路中移相器校准误差传播问题,提出一种基于自定义网络同时学习所有热光移相器相位-电流关系的全局校准方法,并实验验证了深度12的量子行走PIC,助力光子量子信息处理。

摘要:

光子集成电路(PIC)制造技术的日益成熟使得在单个芯片上高集成度地集成越来越多的光学组件成为可能。随着电路复杂性的增加,大规模PIC中有源移相器的校准成为一个至关重要的问题。传统的一对一校准技术在误差传播方面面临重大挑战,且实现所有移相器的解耦以进行独立校准并非易事。为解决这一问题,我们提出了一种适用于大规模PIC的全局校准方法。该方法利用自定义网络,通过最小化测量数据集的负似然,同时学习PIC上所有热光移相器的非线性相位-电流关系。此外,该方法还能同步提取所有静态分束器组件的反射率。作为示例,我们对一个电路深度为12的量子行走PIC进行了校准,并实验演示了可编程的离散时间量子行走。这些结果将极大地促进大规模PIC在光子量子信息处理中的应用。

英文摘要:

The growing maturity of photonic integrated circuit (PIC) fabrication technology enables the high integration of an increasing number of optical components onto a single chip. With the incremental circuit complexity, the calibration of active phase shifters in a large-scale PIC becomes a crucially important issue. The traditional one-by-one calibration techniques encounter significant hurdles with the propagation of calibration errors, and achieving the decoupling of all phase shifters for independent calibration is not straightforward. To address this issue, we propose a global calibration approach for large-scale PIC. Our method utilizes a custom network to simultaneously learn the nonlinear phase-current relations for all thermo-optic phase shifters on the PIC by minimizing the negative likelihood of the measurement datasets. Moreover, the reflectivities of all static beam splitter components can also be synchronizedly extracted using this calibration method. As an example, a quantum walk PIC with a circuit depth of 12 is calibrated, and a programmable discrete-time quantum walk is experimentally demonstrated. These results will greatly benefit the applications of large-scale PICs in photonic quantum information processing.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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