Investigation on photonic generation of narrow-width frequency-doubled Nyquist pulses based on spectrum manipulation

IF 3.3 3区工程技术 Q2 ENGINEERING, ELECTRICAL & ELECTRONIC

Optical and Quantum Electronics Pub Date : 2025-04-13 DOI:10.1007/s11082-025-08171-7

Jin Yuan, Xiuxiu Xu, Ying Mei, Jinbo Liu, Zengrui Li

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引用次数: 0

Abstract

A scheme for generating Nyquist pulses with a 12-line doubled flat optical frequency comb (OFC) is presented by cascading two two-electrode Mach–Zehnder modulators (De-MZM). The first De-MZM1 can operate in the optical carrier suppression modulation state to obtain a 4-line OFC, which is then introduced into the optical interleaver phase-locked; the resulting 4-line OFC serves as the driving signal into the De-MZM2 for the secondary modulation to generate more comb lines. OFC amplitude is adjusted to satisfy the sinc-shaped Nyquist waveform characteristics by fixing two De-MZM modulation indices. Theoretical analysis and simulation results reveal that a 20 GHz narrow-amplitude Nyquist pulse corresponding to a 12-line OFC can be generated using a 10 GHz radio-frequency drive signal. Impacts of bias point drift of the two modulators are discussed and tolerance ranges are determined. 10 GHz, 15 GHz, and 30 GHz Nyquist pulses are also generated based on the above theory. The approach offers the possibility of generating Nyquist pulses, facilitating their application in channel multiplexing.

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基于频谱处理的窄宽倍频奈奎斯特脉冲光子产生研究

提出了一种利用双电极Mach-Zehnder调制器（De-MZM）级联的12线双平面光频梳（OFC）产生奈奎斯特脉冲的方案。第一De-MZM1可以在光载波抑制调制状态下工作，获得4线OFC，然后将其引入光交织器锁相；由此产生的4线OFC作为进入De-MZM2的驱动信号，用于二次调制以产生更多的梳线。通过固定两个De-MZM调制指标，调整OFC幅度以满足正弦奈奎斯特波形特性。理论分析和仿真结果表明，利用10ghz射频驱动信号可以产生与12线OFC相对应的20ghz窄幅奈奎斯特脉冲。讨论了两个调制器偏置点漂移的影响，确定了容差范围。10ghz、15ghz和30ghz奈奎斯特脉冲也是基于上述理论产生的。该方法提供了产生奈奎斯特脉冲的可能性，促进了它们在信道复用中的应用。

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

Optical and Quantum Electronics 工程技术-工程：电子与电气

CiteScore

4.60

自引率

20.00%

发文量

810

审稿时长

3.8 months

期刊介绍： Optical and Quantum Electronics provides an international forum for the publication of original research papers, tutorial reviews and letters in such fields as optical physics, optical engineering and optoelectronics. Special issues are published on topics of current interest. Optical and Quantum Electronics is published monthly. It is concerned with the technology and physics of optical systems, components and devices, i.e., with topics such as: optical fibres; semiconductor lasers and LEDs; light detection and imaging devices; nanophotonics; photonic integration and optoelectronic integrated circuits; silicon photonics; displays; optical communications from devices to systems; materials for photonics (e.g. semiconductors, glasses, graphene); the physics and simulation of optical devices and systems; nanotechnologies in photonics (including engineered nano-structures such as photonic crystals, sub-wavelength photonic structures, metamaterials, and plasmonics); advanced quantum and optoelectronic applications (e.g. quantum computing, memory and communications, quantum sensing and quantum dots); photonic sensors and bio-sensors; Terahertz phenomena; non-linear optics and ultrafast phenomena; green photonics.