同名作者【Guanyu Liu】论文列表 -- 中国光学期刊网

材料

Yb³⁺/Tm³⁺共掺磷酸盐玻璃的上转换发光性能特邀研究论文

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张芳腾 ^1,2,*马琳 ¹曾佑君 ¹刘关玉 ¹聂兆刚 ^1,2,**

作者单位

摘要

¹ 广东工业大学物理与光电工程学院，广东广州 510006

² 广东工业大学广东省信息光子技术重点实验室，广东广州 510006

采用高温熔融法制备Yb³⁺/Tm³⁺共掺的磷酸盐玻璃，探讨了Tm³⁺摩尔分数和玻璃基体中Te⁴⁺摩尔分数对玻璃上转换发光性能的影响。吸收光谱表明，玻璃中的Yb³⁺和Tm³⁺在300~1450 nm波长的吸收位置互不干扰。研究了制备的玻璃样品在980 nm波长激光二极管泵浦下的上转换发光性能。结果表明，Yb³⁺/Tm³⁺在476 nm（¹G₄→³H₆）、650 nm（¹G₄→³F₄）和793 nm（³H₄→³H₆）三个位置有上转换发光峰。其中，793 nm的近红外发光峰最强，476 nm的发光峰强度次之，650 nm的发光峰强度最弱。通过调整Tm³⁺的摩尔分数和玻璃基质中Te⁴⁺的摩尔分数可以实现对上述三个发光峰强度的调制。

材料磷酸盐玻璃上转换发光铥镱共掺组分调控

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激光与光电子学进展

2022, 59(15): 1516009

Articles

Double-balanced mixer based on monolayer graphene field-effect transistors

Min Wu ¹Weida Hong ²Guanyu Liu ²Jiejun Zhang ²[ ... ]Miao Zhang ²

Author Affiliations

Abstract

¹ School of Microelectronics, University of Science and Technology of China, Hefei 230022, China

² Shanghai Institute of Microsystem and Information Technology, Chinese Academy of Sciences, Shanghai 200050, China

Graphene field-effect transistors (GFET) have attracted much attention in the radio frequency (RF) and microwave fields because of its extremely high carrier mobility. In this paper, a GFET with a gate length of 5 μm is fabricated through the van der Walls (vdW) transfer process, and then the existing large-signal GFET model is described, and the model is implemented in Verilog-A for analysis in RF and microwave circuits. Next a double-balanced mixer based on four GFETs is designed and analyzed in advanced design system (ADS) tools. Finally, the simulation results show that with the input of 300 and 280 MHz, the IIP3 of the mixed signal is 24.5 dBm.

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Journal of Semiconductors

2022, 43(5): 052002

RESEARCH ARTICLE

Highly stable and repeatable femtosecond soliton pulse generation from saturable absorbers based on two-dimensional Cu_3-xP nanocrystals

Haoran MU ¹Zeke LIU ²Xiaozhi BAO ³Zhichen WAN ¹[ ... ]Qiaoliang BAO ¹

作者单位

摘要

¹ Department of Materials Science and Engineering and ARC Centre of Excellence in Future Low-Energy Electronics Technologies (FLEET), Monash University, Clayton, Victoria 3800, Australia

² Institute of Functional Nano and Soft Materials (FUNSOM), Jiangsu Key Laboratory for Carbon-Based Functional Materials and Devices, and Collaborative Innovation Center of Suzhou Nano Science and Technology, Soochow University, Suzhou 215123, China

³ Joint Key Laboratory of the Ministry of Education, Institute of Applied Physics and Materials Engineering (IAPME), University of Macau, Macau, China

⁴ Guangdong Provincial Key Laboratory of Optical Fiber Sensing and Communications, Institute of Photonics Technology, Jinan University, Guangzhou 510632, China

⁵ Jiangsu Key Laboratory of Advanced Laser Materials and Devices, Jiangsu Collaborative Innovation Center of Advanced Laser Technology and Emerging Industry, School of Physics and Electronic Engineering, Jiangsu Normal University, Xuzhou 221116, China

plasmonic semiconductors fiber laser modelocking ultrafast generation

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Frontiers of Optoelectronics

2020, 13(2): 139

Lasers and laser optics

Femtosecond fiber laser at 780 nm for two-photon autofluorescence imaging

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Wan Yang ¹Danlei Wu ^1,2Runlong Wu ¹Guanyu Liu ¹[ ... ]Aimin Wang ^1,*

Author Affiliations

Abstract

¹ State Key Laboratory of Advanced Optical Communication System and Networks, School of Electronics Engineering and Computer Science, Peking University, Beijing 100871, China

² Key Laboratory of Precision Opto-Mechatronics Technology, Ministry of Education, School of Instrumentation Science & Optoelectronics Engineering, Beihang University, Beijing 100191, China

We present an Er-doped fiber (Er:fiber)-based femtosecond laser at 780 nm with 256 MHz repetition rate, 191 fs pulse duration, and over 1 W average power. Apart from the careful third-order dispersion management, we introduce moderate self-phase modulation to broaden the output spectrum of the Er:fiber amplifier and achieve 193 fs pulse duration and 2.43 W average power. Over 40% frequency doubling efficiency is obtained by a periodically poled lithium niobate crystal. Delivering through a hollow-core photonic bandgap fiber, this robust laser becomes an ideal and convenient light source for two-photon autofluorescence imaging.

140.7090 Ultrafast lasers 140.3500 Lasers, erbium 140.3515 Lasers, frequency doubled

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Chinese Optics Letters

2019, 17(7): 071405

Lasers and Laser Optics

44.6 fs pulses from a 257 MHz Er:fiber laser mode-locked by biased NALM

Wanli Gao ^*Guanyu Liu Zhigang Zhang

Author Affiliations

Abstract

State Key Laboratory of Advanced Optical Communication System and Networks, School of Electronics Engineering and Computer Science, Peking University, Beijing 100871, China

44.6 fs pulses from a 257 MHz, mode-locked non-polarization maintaining Er-doped fiber laser based on a biased nonlinear amplifying loop mirror are reported. The output power is 104 mW and the single-pulse energy is 0.4 nJ. The minimum pulse duration of the direct output is 44.6 fs, which is the shortest in this kind of laser.

140.4050 Mode-locked lasers 140.3500 Lasers, erbium

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Chinese Optics Letters

2018, 16(11): 111401

激光器件与激光物理

基于准相位匹配的掺铒飞秒光纤激光器倍频特性研究

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吴嘉瑞 ¹吕志强 ¹陆星 ¹刘关玉 ²施可彬 ^1,*

作者单位

摘要

¹ 北京大学人工微结构和介观物理国家重点实验室, 北京 100871

² 北京大学区域光纤通信网与新型光通信系统国家重点实验室, 北京 100871

研究了不同厚度周期极化铌酸锂晶体(PPLN)对掺铒飞秒光纤激光器倍频特性的影响。基于非线性偏振旋转锁模原理和啁啾脉冲放大技术,在1560 nm波段实现了重复频率为100 MHz,输出功率为423 mW,脉冲宽度为80 fs的掺铒飞秒光纤激光输出。以此为基频光源,对0.5,1,10 mm三种不同厚度PPLN倍频晶体进行倍频特性研究,实现了波长在780 nm的飞秒激光输出。其中采用0.5 mm晶体时获得了功率为100.4 mW、脉冲宽度为104 fs的倍频光输出,倍频转换效率为23.7%;采用1 mm晶体时获得了功率为165.0 mW、脉冲宽度为161 fs的倍频输出,倍频转换效率为39%;采用10 mm晶体时获得了功率为185.5 mW,脉冲宽度为305 fs的倍频光输出,倍频转换效率达43.7%。并解释了倍频转换效率和倍频光脉冲宽度随PPLN晶体厚度的变化规律。实验数据为基于锁模光纤激光器产生780 nm波段飞秒光脉冲的研究提供了有益的参考。

激光器掺铒飞秒光纤激光器啁啾脉冲放大器非线性偏振旋转锁模倍频周期极化铌酸锂晶体

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中国激光

2018, 45(7): 0701001

ICF与激光等离子体

反射器对氙灯工作性能影响的实验研究

杨泽锋 ^1,*李兴文 ¹刘冠宇 ¹贾申利 ¹[ ... ]李海兵 ²

作者单位

摘要

¹ 西安交通大学电力设备电气绝缘国家重点实验室, 西安 710049

² 中国科学院上海光学精密机械研究所, 上海 201800

针对灯箱中反射器的设计和运行情况，设计实验量化了反射器对氙灯辐射和钕玻璃荧光效率的影响。氙灯辐射由强流管测量的氙灯辐射波形和能量计测量的辐射能量获得；钕玻璃荧光由自主设计的荧光测量系统获得；同时，使用高速摄影仪对放电通道进行观测。实验发现，反射器在此次实验条件下可以提高氙灯辐射效率89%，提高钕玻璃荧光效率78%。而且，实验发现工程运行中氙灯“发白”，是反射器引导氙灯放电通道在靠近反射器一侧形成，导致该处过度烧蚀的结果。

反射器氙灯辐射荧光放电通道 reflector flash lamp radiation fluorescence discharge channel

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强激光与粒子束

2018, 30(3): 032001

ICF与激光等离子体

结构参数对环形氙灯光效影响的实验研究

杨泽锋 ^1,*刘冠宇 ¹李兴文 ¹贾申利 ¹[ ... ]隋展 ³

作者单位

摘要

¹ 西安交通大学电力设备电气绝缘国家重点实验室, 西安 710049

² 中国科学院上海光学精密机械研究所, 上海 201800

³ 中国工程物理研究院上海激光等离子体研究所, 上海 201800

脉冲氙灯作为放大器的泵浦源, 其泵浦效率直接影响放大器效率。环形氙灯被证明是一种有望提高泵浦效率,并代替目前直管氙灯工作的新型氙灯。针对不同气压、不同结构的环形氙灯, 通过实验研究了气压和内径对环形氙灯放电特性、光效特性以及爆炸特性的影响。结果表明, 增加环形氙灯气压和内径可提高其光学效率, 被泵浦钕玻璃的荧光最大可提高峰值22.3%, 积分值15.7%。但是, 增加气压和内径会降低环形氙灯的热负载能力。实验发现气压为26 664 Pa, 内径为30 mm的环形氙灯拥有最佳光效并能通过寿命测试。