Huibo Liu, Yu Yu, Kai Li, Hengzhe Yu, Di Wu, Yulei Wang, Zhiwei Lu
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These encompass a high refractive index, fostering potent photon-phonon interactions, low loss characteristics, and high integration potential. Consequently, employing LN as a material for Brillouin lasers promises to enhance certain aspects of laser performance and enable more comprehensive research into Brillouin lasers. In this paper, a micro-ring waveguide structure with LN as the main material is constructed, and the forward gain of stimulated Brillouin scattering, the distribution of electric field in multiple modes and the maximum tunable range are further analyzed. The simulation results exhibit that the tunable forward SBS effect can be achieved in the LN optical waveguides, the maximum forward Brillouin gain can reach <jats:inline-formula><mml:math xmlns:mml=\"http://www.w3.org/1998/Math/MathML\"><mml:mrow><mml:mn>1.34</mml:mn><mml:msup><mml:mi>W</mml:mi><mml:mrow><mml:mo>−</mml:mo><mml:mn>1</mml:mn></mml:mrow></mml:msup><mml:msup><mml:mrow><mml:mtext> </mml:mtext><mml:mi>m</mml:mi></mml:mrow><mml:mrow><mml:mo>−</mml:mo><mml:mn>1</mml:mn></mml:mrow></mml:msup></mml:mrow></mml:math></jats:inline-formula>. Additionally, the tunable phonon frequency can range from 1 GHz to 31 GHz, effectively doubling that of silicon ring waveguides and thus extending the range of phonon tunability. Therefore, the LN micro-ring waveguide structure provides a new reference direction for the construction of a new tunable laser and a new idea for the generation of lasers to find a Brillouin medium with high SBS effect.","PeriodicalId":12507,"journal":{"name":"Frontiers in Physics","volume":null,"pages":null},"PeriodicalIF":1.9000,"publicationDate":"2024-05-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":"{\"title\":\"High-gain lithium niobate brillouin laser with tunable phonon frequency of 1∼31 GHz\",\"authors\":\"Huibo Liu, Yu Yu, Kai Li, Hengzhe Yu, Di Wu, Yulei Wang, Zhiwei Lu\",\"doi\":\"10.3389/fphy.2024.1402002\",\"DOIUrl\":null,\"url\":null,\"abstract\":\"Stimulated Brillouin scattering (SBS) is a significant nonlinear optical phenomenon utilized across various fields. Its applications span optical sensing, microwave photonics, and all-optical signal processing. In the current information-driven era, the laser industry is imposing increasingly stringent demands on laser technologies, thus propelling integrable on-chip SBS devices into a pivotal research trajectory. Simultaneously, the quest for materials manifesting heightened SBS effects has emerged as a primary focal point in optical fiber transmission endeavors. Lithium niobate (LN) stands out as a promising nonlinear optical material endowed with numerous exemplary attributes. These encompass a high refractive index, fostering potent photon-phonon interactions, low loss characteristics, and high integration potential. Consequently, employing LN as a material for Brillouin lasers promises to enhance certain aspects of laser performance and enable more comprehensive research into Brillouin lasers. In this paper, a micro-ring waveguide structure with LN as the main material is constructed, and the forward gain of stimulated Brillouin scattering, the distribution of electric field in multiple modes and the maximum tunable range are further analyzed. The simulation results exhibit that the tunable forward SBS effect can be achieved in the LN optical waveguides, the maximum forward Brillouin gain can reach <jats:inline-formula><mml:math xmlns:mml=\\\"http://www.w3.org/1998/Math/MathML\\\"><mml:mrow><mml:mn>1.34</mml:mn><mml:msup><mml:mi>W</mml:mi><mml:mrow><mml:mo>−</mml:mo><mml:mn>1</mml:mn></mml:mrow></mml:msup><mml:msup><mml:mrow><mml:mtext> </mml:mtext><mml:mi>m</mml:mi></mml:mrow><mml:mrow><mml:mo>−</mml:mo><mml:mn>1</mml:mn></mml:mrow></mml:msup></mml:mrow></mml:math></jats:inline-formula>. Additionally, the tunable phonon frequency can range from 1 GHz to 31 GHz, effectively doubling that of silicon ring waveguides and thus extending the range of phonon tunability. 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引用次数: 0
摘要
受激布里渊散射(SBS)是一种重要的非线性光学现象,广泛应用于各个领域。其应用领域包括光学传感、微波光子学和全光学信号处理。在当今信息驱动的时代,激光产业对激光技术提出了越来越严格的要求,从而将可集成的片上 SBS 器件推向了关键的研究轨道。与此同时,在光纤传输领域,对具有更强 SBS 效应的材料的探索也成为一个主要焦点。铌酸锂(LN)是一种前景广阔的非线性光学材料,具有众多典范特性。这些特性包括高折射率、促进有效的光子-声子相互作用、低损耗特性和高集成度潜力。因此,将 LN 用作布里渊激光器的材料有望提高激光器某些方面的性能,并促进对布里渊激光器进行更全面的研究。本文构建了以 LN 为主材料的微环波导结构,并进一步分析了受激布里渊散射的正向增益、多模电场分布和最大可调谐范围。仿真结果表明,在 LN 光波导中可以实现可调谐的正向 SBS 效应,最大正向布里渊增益可达 1.34W-1 m-1。此外,可调谐声子频率范围从 1 GHz 到 31 GHz,实际上是硅环波导的两倍,从而扩大了声子可调谐范围。因此,LN 微环波导结构为构建新型可调谐激光器提供了新的参考方向,也为寻找具有高 SBS 效应的布里渊介质的激光器生成提供了新思路。
High-gain lithium niobate brillouin laser with tunable phonon frequency of 1∼31 GHz
Stimulated Brillouin scattering (SBS) is a significant nonlinear optical phenomenon utilized across various fields. Its applications span optical sensing, microwave photonics, and all-optical signal processing. In the current information-driven era, the laser industry is imposing increasingly stringent demands on laser technologies, thus propelling integrable on-chip SBS devices into a pivotal research trajectory. Simultaneously, the quest for materials manifesting heightened SBS effects has emerged as a primary focal point in optical fiber transmission endeavors. Lithium niobate (LN) stands out as a promising nonlinear optical material endowed with numerous exemplary attributes. These encompass a high refractive index, fostering potent photon-phonon interactions, low loss characteristics, and high integration potential. Consequently, employing LN as a material for Brillouin lasers promises to enhance certain aspects of laser performance and enable more comprehensive research into Brillouin lasers. In this paper, a micro-ring waveguide structure with LN as the main material is constructed, and the forward gain of stimulated Brillouin scattering, the distribution of electric field in multiple modes and the maximum tunable range are further analyzed. The simulation results exhibit that the tunable forward SBS effect can be achieved in the LN optical waveguides, the maximum forward Brillouin gain can reach 1.34W−1m−1. Additionally, the tunable phonon frequency can range from 1 GHz to 31 GHz, effectively doubling that of silicon ring waveguides and thus extending the range of phonon tunability. Therefore, the LN micro-ring waveguide structure provides a new reference direction for the construction of a new tunable laser and a new idea for the generation of lasers to find a Brillouin medium with high SBS effect.
期刊介绍:
Frontiers in Physics publishes rigorously peer-reviewed research across the entire field, from experimental, to computational and theoretical physics. This multidisciplinary open-access journal is at the forefront of disseminating and communicating scientific knowledge and impactful discoveries to researchers, academics, engineers and the public worldwide.