Computing the causal impulse responses of passive photonic integrated circuits by extrapolation

Xiaoxue Jiang; Jiajun Feng; Yinghao Ye

doi:10.1117/12.2687100

28 November 2023 Computing the causal impulse responses of passive photonic integrated circuits by extrapolation

Xiaoxue Jiang, Jiajun Feng, Yinghao Ye

Proceedings Volume 12764, Optoelectronic Devices and Integration XII; 127640Z (2023) https://doi.org/10.1117/12.2687100
Event: SPIE/COS Photonics Asia, 2023, Beijing, China

Abstract

Accurate time-domain simulation is crucial for designing large and complex photonic integrated circuits (PICs). Passive devices and circuits, such as Mach-Zehnder interferometers and all kinds of wavelength filters, play important roles in PICs, with their input and output characteristics typically described using S-parameters. However, their practical application in the time domain is limited by the fact that they are usually band-limited. Applying the inverse fast Fourier transform (IFFT) directly to these band-limited S-parameters can result in impulse responses that violate causality significantly. To address this issue, this paper proposes a novel method for extrapolating S-parameters of photonic circuits in order to obtain causal and accurate impulse responses.

(2023) Published by SPIE. Downloading of the abstract is permitted for personal use only.

Citation Download Citation

Xiaoxue Jiang, Jiajun Feng, and Yinghao Ye "Computing the causal impulse responses of passive photonic integrated circuits by extrapolation", Proc. SPIE 12764, Optoelectronic Devices and Integration XII, 127640Z (28 November 2023); https://doi.org/10.1117/12.2687100

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