Ultra-high spectral purity laser derived from weak external distributed perturbation

IF 15.3 1区 物理与天体物理 Q1 OPTICS
Laiyang Dang, Ligang Huang, Lei-lei Shi, Fuhui Li, Guolu Yin, L. Gao, Tianyi Lan, Yujia Li, Lidan Jiang, T. Zhu
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引用次数: 10

Abstract

Ultra-high spectral purity lasers are of considerable research interests in numerous fields such as coherent optical communication, microwave photonics, distributed optical fiber sensing, gravitational wave detection, optical clock, and so on. Herein, to deeply purify laser spectrum with compact size under normal condition, we propose a novel and practical idea to effectively suppress the spontaneous radiation of the laser cavity through weak external distributed perturbation. Sub-sequently, a laser configuration consisting of a main lasing cavity and an external distributed feedback cavity is proposed. The feedback signal with continuous spatio-temporal phase transition controlled by a distributed feedback structure is injected into the main cavity, which can deeply suppress the coupling rate from the spontaneous radiation to the stimulated emission and extremely purify the laser spectrum. Eventually, an ultra-narrow linewidth on-chip laser system with a side mode suppression ratio greater than 80 dB, an output linewidth of 10 Hz, and a relative intensity noise less than -150 dB/Hz is successfully obtained under normal conditions. The proposed concept in this work provides a new perspective for extreme regulation of laser parameters by using weak external distributed perturbation, which can be val-id for various gain-type lasers with wide wavelength bands. Ultra-high from weak external distributed perturbation.
基于弱外部分布扰动的超高光谱纯度激光器
超高光谱纯度激光器在相干光通信、微波光子学、分布式光纤传感、引力波探测、光时钟等诸多领域都有着重要的研究意义。为此,为了在正常条件下深度净化尺寸紧凑的激光光谱,我们提出了一种新颖实用的想法,即通过微弱的外部分布摄动有效抑制激光腔的自发辐射。随后,提出了一种由主激光腔和外分布反馈腔组成的激光器结构。将分布反馈结构控制的具有连续时空相变的反馈信号注入到主腔中,可以深度抑制自发辐射到受激发射的耦合速率,极大地净化激光光谱。最终,在正常条件下成功获得了侧模抑制比大于80 dB、输出线宽为10 Hz、相对强度噪声小于-150 dB/Hz的超窄线宽片上激光系统。本文提出的概念为利用弱外部分布扰动对激光参数进行极端调节提供了一个新的视角,该方法适用于各种宽波段的增益型激光器。来自弱外部分布扰动的超高。
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来源期刊
CiteScore
19.30
自引率
7.10%
发文量
128
期刊介绍: Opto-Electronic Advances (OEA) is a distinguished scientific journal that has made significant strides since its inception in March 2018. Here's a collated summary of its key features and accomplishments: Impact Factor and Ranking: OEA boasts an impressive Impact Factor of 14.1, which positions it within the Q1 quartiles of the Optics category. This high ranking indicates that the journal is among the top 25% of its field in terms of citation impact. Open Access and Peer Review: As an open access journal, OEA ensures that research findings are freely available to the global scientific community, promoting wider dissemination and collaboration. It upholds rigorous academic standards through a peer review process, ensuring the quality and integrity of the published research. Database Indexing: OEA's content is indexed in several prestigious databases, including the Science Citation Index (SCI), Engineering Index (EI), Scopus, Chemical Abstracts (CA), and the Index to Chinese Periodical Articles (ICI). This broad indexing facilitates easy access to the journal's articles by researchers worldwide.
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