Yi Li

Wuhan University of Technology

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Jianguo Tian

Nankai University

Kailiang Zhang

Tianjin University of Technology

Cuifeng Ying

Nottingham Trent University

Fang Wang

Tianjin University of Technology

Jun Liu

China Coal Technology and Engineering Group Corp (China)

Zhiye Sun

Nankai University

Qing Ye

Nankai University

Wenyuan Zhou

Peking University

Jianhua Zhang

Shanghai University

Dengxuan Tang

Tianjin University of Technology

Cooperative Institutions

Chinese Academy of Sciences

Nankai University

University of Chinese Academy of Sciences

Shanghai University

Tianjin University

Tianjin University of Technology

Shandong University

China Jiliang University

University of Science and Technology of China

Zhejiang University

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Broadband flat-amplitude multiwavelength Brillouin-Raman fiber laser with spectral reshaping by Rayleigh scattering

Optics Express (2013)

Zinan Wang Han Wu Mengqiu Fan Yi Li Yuan Gong

In this letter, we propose a novel configuration for generating multiwavelength Brillouin-Raman fiber laser (MBRFL). The spectral reshaping effect introduced by Rayleigh scattering in a 50 km single mode fiber unifies the generated Brillouin comb in terms of both power level and linewidth. As a consequence, we are able to obtain a 40 nm flat-amplitude MBRFL with wide bandwidth from 1557 nm to 1597 nm covering >500 Stokes lines. This is, to the best of our knowledge, the widest flat-amplitude bandwidth of MBRFL with uniform Stokes combs using just a single Raman pump laser. The channel-spacing is 0.08 nm and the measured OSNR is higher than 12.5 dB. We also demonstrate that the output spectrum of the MBRFL is nearly unaffected over 14 dB range of Brillouin pumping power.

Laser linewidth

Brillouin zone

10.1364/oe.21.029358

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Citations (74)

Mini-band states in graded periodic 1D photonic superstructure

Applied Physics B (2012)

Cuifeng Ying Wei Zhou Q. Ye Yi Li Jianguo Tian

Modulation (music)

Superstructure

Supercell

10.1007/s00340-012-4940-x

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Citations (2)

In-situ Resistance Measurements of Ga-Se Reactions During Selenization Process

23rd European Photovoltaic Solar Energy Conference and Exhibition, 1-5 September 2008, Valencia, Spain (2008)

Jianguo Tian Yi Li F.-F. Liu F.-Y. Li Qi Le He

10.4229/23rdeupvsec2008-3bv.4.12

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Citations (1)

1.9W single-frequency, grating external-cavity tapered laser with narrow linewidth

14th National Conference on Laser Technology and Optoelectronics (LTO 2019) (2019)

Qian Li Min Wan Yanhua Lu Xiaohong Chen Huaijin Ren

A high-power tunable Littrow grating external-cavity tapered semiconductor laser is designed in this paper. By using the grating external cavity to lock the wavelength and narrow the linewidth, we gained a series of single-frequency laser with the central wavelength at 927 nm, tunable range >20nm and linewidth < 980 fm with the continuous pumping. When the wavelength is 926.8 nm, the threshold current is 1.25A and the oblique efficiency is 0.682 W/A. When the injection current increases to 4A, the maximum output power is up to 1.906W, with the electro-optic efficiency of 21.7%, the linewidth of 700fm, and the beam quality of 1.948 and 3.788 in the fast and slow axis respectively.

Laser linewidth

10.1117/12.2533883

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Citations (0)

Integrated lens auto-focus system driven by a nut-type ultrosonic motor (USM)

Science China Technological Sciences (2009)

Tieying Zhou Yu Chen Cunyue Lu Deyong Fu Xiao Hu

Ultrasonic motor

Piezoelectric motor

10.1007/s11431-009-0246-6

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Citations (14)

Enantioselective C2–H Alkylation of Pyridines with 1,3-Dienes via Ni–Al Bimetallic Catalysis

Journal of the American Chemical Society (2022)

Jiang‐Fei Li Deng Pan Hao-Rui Wang Tao Zhang Yi Li

A chiral phosphine oxide-ligated Ni–Al bimetallic catalyst was used to realize an enantioselective C2–H alkylation of pyridines without the need of a C2-block. A wide range of pyridines, including unsubstituted pyridine, C3, C4, and C2-substituted pyridines, and even complex pyridine-containing bioactive molecules are well compatible with the reaction, providing up to 81% yield and up to 97% ee.

Bimetallic strip

Phosphine oxide

Synergistic catalysis

10.1021/jacs.2c09306

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Citations (52)

<title>Improved self-reliance shearing interferometric technique for collimation testing</title>

Proceedings of SPIE, the International Society for Optical Engineering/Proceedings of SPIE (1995)

Mingshan Zhao Guohua Li Zhaobing Wang Yaling Jing Yi Li

Self-reference single plate shearing interferometric technique used for collimation testing of light beams are briefly reviewed. Two improved configurations of this self-reference interferometry with an inclined screen and matched half-field interferograms are described in detail. Sensitivity of these configurations is analyzed and compared with that of the existing ones.

Collimated light

Shearing (physics)

Shearing interferometer

10.1117/12.211884

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Highly Sensitive and Specific Detection of Myoglobin in the Urine Based on Enhanced Photothermal Effect

IEEE Sensors Journal (2022)

Yuansheng Yin Yinping Miao Yi Li Yibo Zheng

Acute myocardial infarction can be diagnosed by measurement of myoglobin concentration in urine. In this article, a label-free sensor is proposed based on the photothermal effect of biomolecules, which is used for the immediate detection of myoglobin concentration in urine. The sensor was fabricated by a tapered microfiber (TMF) coated with the ultraviolet-curable polymer (UVCP) that has a high thermo-optical coefficient. The photothermal signal of biomolecules is only related to their selective absorption, while the scattering and reflection losses do not generate the photothermal signal. Therefore, specific identification could be realized by detecting the photothermal signal of myoglobin biomolecules. The results showed that the UVCP could enhance the detection sensitivity of photothermal signal due to the high thermo-optic coefficient. The sensitivity of the device is −267.652 nm/(mg/mL) in the concentration range of 0.0001–0.10 mg/mL, the limit of detection (LOD) is 74.7 ng/mL, and the response time is only 30 s. It can meet the demand for detecting the myoglobin concentrations in the urine analysis of related diseases, which has potential applications in the early diagnosis and quantitative analysis of conditions.

Biomolecule

SIGNAL (programming language)

Photothermal effect

10.1109/jsen.2022.3218816

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Citations (2)

Tunable ring laser using a tapered single mode fiber tip

Applied Optics (2009)

Xiaozhen Wang Yi Li Xiaoyi Bao

A tunable ring laser using a tapered single mode fiber tip as a bandpass filter has been proposed and demonstrated for the first time to our knowledge. This is a simple and cost-effective tunable source. It is found that the tuning range and bandwidth of the laser are related to the relaxation time of the optical amplifier, the current of the amplifier, and the steepness of the tip shape. The calculations and experimental results show that the laser has a tuning range of 9 nm in the L-band and the spectral linewidth can be varied from 0.06 nm to 0.17 nm.

Laser linewidth

Ring laser

10.1364/ao.48.006827

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Citations (10)

A Preliminary Study of Disputation Behavior in Online Debating Forum

Zhongyu Wei Yandi Xia Chen Li Yang Liu Zachary Stallbohm

10.18653/v1/w16-2820

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Citations (11)