搜索到5687篇“ NIOBATE“的相关文章
铌酸锂微米光纤模内后向布里渊散射特性
2025年
多模光纤的布里渊传感技术因其能够同时进行温度、应变等多参量的模态传输,具备更高的信息容量和传输效率而备受关注.此外,铌酸锂材料凭借其优异的电光特性,在传感领域展现出潜在应用价值,有望提供更高灵敏度和精度.然而,受工艺成熟度影响,目前光纤传感的研究多集中于硅基材料,以铌酸锂为纤芯材料的研究相对较少,其应用潜力被普遍低估.本文针对铌酸锂光纤中的布里渊散射效应的理论研究,通过有限元仿真技术,模拟微米量级铌酸锂光纤中各阶数模式的后向布里渊散射特性,分析光纤中前5个LP模(LP_(01),LP_(11),LP_(21),LP_(02)和LP_(31))的模内受激布里渊散射特性,以探明铌酸锂微米光纤模态内后向布里渊散射特性.结果表明,铌酸锂光纤的有效折射率(2.1785—1.9797)、布里渊散射频移(20.63—18.747 GHz)以及增益(4.0115—13.503 m^(-1)·W^(-1))均随着模式阶数的增高而减小.模拟结果进一步表明,与普通硅结构光纤相比,铌酸锂光纤结构的布里渊增益有显著提高,预示其在传感方面的灵敏度也会更高.
贺文君侯雅斐闫嵩泉吴泽鹏刘毅游亚军何剑
关键词:布里渊散射铌酸锂模拟仿真
Passive on-chip isolators based on the thin-film lithium niobate platform
2025年
Optical isolators,the photonic analogs of electronic diodes,are essential for ensuring the unidirectional flow of light in optical systems,thereby mitigating the destabilizing effects of back reflections.Thin-film lithium niobate(TFLN),hailed as“the silicon of photonics,”has emerged as a pivotal material in the realm of chip-scale nonlinear optics,propelling the demand for compact optical isolators.We report a breakthrough in the development of a fully passive,integrated optical isolator on the TFLN platform,leveraging the Kerr effect to achieve an impressive 10.3 dB of isolation with a minimal insertion loss of 1.87 dB.Further theoretical simulations have demonstrated that our design,when applied to a microring resonator with a Q factor of 5×10^(6),can achieve 20 dB of isolation with an input power of merely 8 mW.This advancement underscores the immense potential of lithium niobate-based Kerr-effect isolators in propelling the integration and application of high-performance on-chip lasers,heralding a new era in integrated photonics.
Jiacheng LiuGongyu XiaQilin HongPingyu ZhuKai-Kai ZhangKeyu XiaPing XuShiqiao QinZhihong Zhu
铌酸镁粉体低温合成方法研究进展
2025年
铌酸镁微波介质陶瓷因优异的介电性能而备受关注。作为制备高性能铌酸镁陶瓷的关键原料,铌酸镁粉体的质量对最终产品的性能起着至关重要的作用。本文对当前国内外铌酸镁粉体的低温制备方法进行了总结,系统分析了固相反应法、湿化学法、共沉淀法和溶胶凝胶法工艺的优势和局限性,并展望了铌酸镁粉体制备技术的未来发展方向,为高性能铌酸镁粉体材料的研发提供了有益的参考和启示。
童亚琦张微李辉李辉张杰郑彧
关键词:固相反应法湿化学法共沉淀法溶胶凝胶法微波介质陶瓷
Nonlinear optical oscillation in on-chip erbium-doped lithium niobate microring resonators
2025年
Erbium-doped lithium niobate(LN)on insulator active devices,such as lasers and amplifiers,have received increasing attention.The nonlinear optical oscillation in them at high power destabilizes the output of signals and cannot be ignored.In this study,we reported the experimental observation and theoretical analysis of the nonlinear optical oscillation in erbiumdoped lithium niobate-on-insulator(LNOI)microring resonators while scanning the pump wavelength.Under the same pump power,the number of oscillation cycles decreases when the wavelength scanning rate increases from 10.6 to 33.9 nm/μs.A theoretical model based on the competition between the thermo-optic nonlinearity and the photorefractive effect was introduced to interpret the oscillation in transmission.A series of parameters were obtained from the comparison between the theoretical and experimental results;some of them,the relaxation rates of the thermal and the electric field,are significantly different from those of undoped LNOI microcavities.This work provides a valuable reference for future applications of active LNOI devices.
Ru ZhangXianhong ZengXueshan ZhengChen YangDahuai ZhengHongde LiuXuanyi YuFeng GaoFang BoYongfa KongGuoquan ZhangJingjun Xu
关键词:MICROCAVITIES
近化学计量比铌酸锂晶体的孪晶缺陷研究
2025年
铌酸锂(LiNbO_(3),简称LN)晶体因其优良的非线性、电光等效应成为最具应用价值的集成光子学材料之一。与同成分铌酸锂(Congruent Lithium Niobate,CLN)晶体相比,近化学计量比铌酸锂(Near-stoichiometric Lithium Niobate,nSLN)晶体的非线性、电光等性能更加突出,具有更高的应用价值。利用扩散法能够制备组分均匀的实用化nSLN晶体,然而对大尺寸LN晶体进行扩散处理时,极易产生孪晶并导致晶片开裂。针对上述问题,本工作开展了扩散法制备大尺寸nSLN晶体的研究,对扩散后晶片上的孪晶缺陷进行表征,分析了孪晶的产生机制,并通过改进晶片放置方式制备了完整的4英寸(100 nm)和6英寸(153 nm)晶片,最后测试了晶片的组分和透过率。结果表明,晶片组分均不低于49.94%(摩尔分数),接近化学计量比,其透过率在600~3300 nm范围内均高于71%。扩散法制备的Z-cut和X-cut晶片上均出现了孪晶,同时Z-cut晶片上的孪晶两两相交时产生裂纹,而X-cut晶片上并未出现裂纹。分析表明Z-cut和X-cut晶片孪晶面为{0112},该孪晶属于形变孪晶。根据形变孪晶的产生机制,认为富锂原料不均匀形变是产生孪晶的主要驱动力。最终,通过改进扩散处理工艺,抑制了扩散孪晶的产生,提高了4英寸(100 nm)、6英寸(153 nm)nSLN晶片的成品率。
郝永鑫孙军杨金凤赵晨成刘子琦李清连许京军
关键词:扩散法孪晶
基于铌酸锂晶体的光束精密指向控制技术研究(特邀)
2025年
系统对比分析现有光束指向控制技术,提出了一种基于铌酸锂晶体的高精度电光光束指向控制方法。采用光轴对称结构,有效降低了电光晶体系统的有效热光系数,显著提升了器件的环境适应性能。数值计算和物理仿真证明了光束偏转的可行性。器件完成封装后,利用Zygo干涉仪测得器件中心通光区域的透射波像差RMS为0.2λ(λ=632.8 nm),红外电荷耦合器件图像传感器角度测量法,测得系统在15 kV电压下的最大光束偏转角度为1.88 mrad。实验结果证明了该器件设计的有效性和可行性,为基于铌酸锂晶体的高精度光束偏转器件的研发奠定了基础,同时为星间激光干涉系统的半物理地面验证实验提供了关键技术储备。
赵卫岗呼新荣葛锦蔓刁文婷冯野
关键词:激光干涉测量电光晶体
Ultra-high-Q photonic crystal nanobeam cavity for etchless lithium niobate on insulator(LNOI)platform
2025年
The expansive spectral coverage and superior optical properties of lithium niobate(LN)offer a comprehensive suite of tools for exploring novel functionalities.Achieving high-quality(Q)photonic resonator cavities is crucial for enhancing light-matter interactions.However,this task is challenging as the device performance is heavily dependent on the fabrication quality of the LN.In this paper,we present experimental validation of an etchless approach to fabricating high-Q photonic crystal nanobeam cavities(PCNBCs).We successfully fabricate PCNBCs with Q factors exceeding 105 while maintaining high transmittance by capitalizing on the low waveguide loss and high fabrication tolerance of TE-polarized mode.Remarkably,the Q factor achieved here exceeds previous reports on etchless LN PCNBCs by over an order of magnitude.Benefiting from this advancement,we further explore a variety of optical functions,including thermo-optic tuning,optically induced bistability,and Fano line shapes generation.These findings present promising prospects for a versatile platform technique,facilitating the development of high-performance electro-optic or acousto-optic modulators,optical logic devices,and quantum photonics,highlighting its significant impact in the field of photonic integration.
Zhi JiangCizhe FangXu RanYu GaoRuiqing WangJianguo WangDanyang YaoXuetao GanYan LiuYue HaoGenquan Han
关键词:BISTABILITY
Lithium niobate electro-optical modulator based on ion-cut wafer scale heterogeneous bonding on patterned SOI wafers
2025年
This paper presents the design,fabrication,and characterization of a high-performance heterogeneous silicon on insulator(SOI)/thin film lithium niobate(TFLN)electro-optical modulator based on wafer-scale direct bonding followed by ion-cut technology.The SOI wafer has been processed by an 8 inch standard fabrication line and cut into 6 inch for direct bonding with TFLN.The hybrid SOI/LN electro-optical modulator operated at the wavelength of 1.55μmis composed of couplers on the Si layer and aMach-Zehnder interferometer(MZI)structure on theLNlayer.The fabricated device exhibits a stable value of the product of half-wave voltage and length(V_(π)L)of around 2.9 V·cm.It shows a good low-frequency electro-optic response flatness and supports 96 Gbit/s data transmission for the NRZ format and 192 Gbit/s data transmission for the PAM-4 format.
ZHUOYUN LIYANG CHENSHUXIAO WANGFAN XUQIANG XUJIANMIN ZHANGQIANNAN ZHUWENCHENG YUEXIN OUYAN CAIMINGBIN YU
关键词:MODULATORSOIINTERFEROMETER
铌酸锂晶体的缺陷结构被引量:1
2024年
铌酸锂是集电光、声光、压电和非线性等性能于一体的人工晶体,在光子学及光电子学等领域具有广泛的应用前景,被誉为“光学硅”或“光子学硅”。近年来随着基于薄膜铌酸锂的集成光子学的迅猛发展,铌酸锂晶体受到更加广泛的关注。然而铌酸锂是一种典型的非化学计量比晶体,其含有大量的本征缺陷,严重影响了晶体性能;同时,铌酸锂晶格对众多杂质离子都有良好的固溶性,而且晶体的性质随着杂质离子的种类和浓度不同产生显著变化。如同单晶硅等半导体材料的缺陷工程,缺陷已经并且必将继续对晶体的性能及铌酸锂集成光子学产生重要影响。本文对铌酸锂晶体的缺陷结构做了一个简要的回顾,尤其是近期涉及薄膜铌酸锂晶体的相关内容,涵盖了本征缺陷结构、非本征缺陷结构、缺陷结构的表征、缺陷结构的理论计算、缺陷结构与晶体性能的构效关系等方面,以期对当前的铌酸锂集成光子学研究贡献微薄之力。
刘宏德王维维张中正郑大怀刘士国孔勇发许京军
关键词:铌酸锂集成光子学构效关系
High polarization extinction ratio achieved base on thin-film lithium niobate
2024年
This article introduces a method of achieving high polarization extinction ratio using a subwavelength grating structure on a lithium niobate thin film platform,and the chip is formed on the surface of the lithium niobate thin film.The chip,with a length of just 20μm,achieved a measured polarization extinction ratio of 29 dB at 1550 nm wavelength.This progress not only proves the possibility of achieving a high extinction ratio on a lithium niobate thin film platform,but also offers important technical references for future work on polarization beam splitters,integrated fiber optic gyroscopes,and so on.
YANG Yong-KangGUO Hong-JieCHEN Wen-BinQU Bai-AngYU Zhi-GuoTAN Man-QingGUO Wen-TaoLIU Hai-Feng

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