摘要
【目的】随着信息技术的高速发展和全球数据流量的激增,通信系统对高带宽、低时延和高可靠性的需求日益迫切,推动了信号频率向更高波段迁移。光学频率梳(OFCs)因其在高精度光谱学、光通信、量子信息处理和时间频率计量中的广泛应用而成为研究热点。相比于传统红外频梳,可见光频梳凭借其更高的带宽和更低的干扰特性,在天地一体通信和数据中心高速互联传输中展现出独特优势。然而传统红外频梳技术难以直接运用于可见光波段,因此文章研究旨在开发高效和低成本的可见光频梳生成方法,以满足未来高速光通信需求。【方法】文章提出了一种在可见光波段基于多频的正弦波和锯齿波混合的波形驱动相位调制器来生成频梳的方法,在波形级直接进行倍频混频处理以降低硬件需求,同时结合正弦波的平坦性和锯齿波的宽谱性以提升生成的有效频梳数量。该方法无需复杂的级联结构,设备简单、成本低且可灵活调整调制参数,为实现高性能可见光频梳提供了高效和实用的解决方案。【结果】实验结果表明,在532 nm波段使用该方法可以在载波光功率10 dBm变化范围内生成34条有效频梳,频梳数量约为传统正弦波驱动的3倍,光谱密度显著增强。【结论】文章所提方法可以低复杂性设备实现高效和平坦可见光频梳的生成,有望为未来第六代移动通信技术(6G)全光网络、数据中心互联和物联网提供高质量多载波源,具有广泛应用前景。
【Objective】With the rapid development of information technology and the surge in global data traffic,the demand for high bandwidth,low latency,and high reliability in communication systems is becoming increasingly urgent,driving the migration of signal frequencies to higher bands.Optical Frequency Combs(OFCs)have become a research hot topic due to their wide appli⁃cations in high⁃precision spectroscopy,optical communications,quantum information processing,and time and frequency metrol⁃ogy.Compared with traditional infrared frequency combs,visible light frequency combs have unique advantages in space⁃to⁃ground communications and high⁃speed interconnection transmission of data centers due to their higher bandwidth and lower inter⁃ference characteristics.However,traditional infrared frequency comb technology is difficult to directly apply to the visible light band.Therefore,this study aims to develop an efficient and low⁃cost visible light frequency comb generation method to meet the needs of future high⁃speed optical communications.【Methods】This paper proposes a method for generating frequency combs in the visible light band by driving a phase modulator using a waveform⁃driven multi⁃frequency mixture of sine and sawtooth waves.Direct frequency multiplication and mixing at the waveform level reduces hardware requirements,while combining the flatness of sine waves with the wide spectral characteristics of sawtooth waves to increase the number of effective frequency combs generated.This method eliminates the need for complex cascade structures,offers simple and low⁃cost equipment,and allows for flexible ad⁃justment of modulation parameters,providing an efficient and practical solution for achieving high⁃performance visible light fre⁃quency combs.【Results】Experimental results show that using this method in the 532 nm band can generate 34 effective frequen⁃cy combs within a 10 dBm carrier optical power variation,which is approximately three times the number of frequency combs used in traditional sinusoidal wave drive,and the spectral density is significantly enhanced.【Conclusion】This method can achieve effi⁃cient and flat visible light frequency comb generation with low⁃complexity equipment,which is expected to provide high⁃quality multi⁃carrier sources for future 6th Generation Mobile Communication Technology(6G)all⁃optical networks,data center interconnection and the Internet of Things,and has broad application prospects.
作者
潘云龙
卢芝蓝
周盈君
迟楠
PAN Yunlong;LU Zhilan;ZHOU Yingjun;CHI Nan(College of Future Information Technology,Fudan University,Shanghai 200433,China;China Telecom Corporation Limited Shanghai Branch,Shanghai 200120,China;Shanghai Engineering Research Center of Low-Earth-Orbit Satellite Communication and Applications,Shanghai 200433,China;Shanghai Collaborative Innovation Center of Low-Earth-Orbit Satellite Communication Technology,Shanghai 200433,China)
出处
《光通信研究》
北大核心
2025年第6期112-119,共8页
Study on Optical Communications
基金
国家自然科学基金资助项目(62031011)。
关键词
光通信
可见光频梳
多频混合波
电光调制
optical communication
visible light frequency comb
multi-frequency mixing wave
electro-optical modulation
