Tao Wang

National University of Defense Technology

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Pu Zhou

National University of Defense Technology

Jian Wu

National University of Defense Technology

Can Li

Wuhan Institute of Technology

Kun Guo

National University of Defense Technology

Bo Ren

Huainan Mining Industry Group (China)

Jin Wang

Argonne National Laboratory

Xinyao Shi

Southern University of Science and Technology

Kai Zhang

Chinese Academy of Sciences

Rongtao Su

National University of Defense Technology

Pengfei Ma

National University of Defense Technology

Cooperative Institutions

Chinese Academy of Sciences

National University of Defense Technology

Shanghai Jiao Tong University

Suzhou Institute of Nano-tech and Nano-bionics

University of Electronic Science and Technology of China

University of Science and Technology of China

University of Chinese Academy of Sciences

Fudan University

Zhejiang University

Institut National de la Recherche Scientifique

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Single-frequency linearly polarized Q-switched fiber laser based on Nb₂GeTe₄ saturable absorber

Chinese Physics B (2022)

Siyu Chen Haiqin Deng Wanru Zhang Dai Yong-ping Tao Wang

We report a single-frequency linearly polarized Q -switched fiber laser based on an Nb 2 GeTe 4 saturable absorber (SA). The Nb 2 GeTe 4 SA triggers passive Q -switching of the laser, and an un-pumped Yb-doped fiber together with a 0.08-nm-bandwidth polarization-maintaining fiber Bragg grating (FBG) acts as an ultra-narrow bandwidth filter to realize single-longitudinal-mode (SLM) oscillation. The devices used in the laser are all kept polarized, so as to ensure linearly polarized laser output. Stable SLM linearly polarized Q -switching operation at 1064.6 nm is successfully achieved, producing a laser with a shortest pulse width of 1.36 μs, a linewidth of 28.4 MHz, a repetition rate of 28.3 kHz–95.9 kHz, and a polarization extinction ratio of about 30 dB. It is believed that the single-frequency linearly polarized pulsed fiber laser studied in this paper has great application value in gravitational wave detection, beam combining, nonlinear frequency conversion, and other fields.

Laser linewidth

Fiber Bragg Grating

Saturable absorption

Extinction ratio

10.1088/1674-1056/acad6d

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Citations (3)

Pulse generation of erbium-doped fiber laser based on liquid-exfoliated FePS₃*

Chinese Physics B (2019)

Qing Rui Yin Jin Wang Xinyao Shi Tao Wang Jie Yang

As a preferable material in the field of photo-detection and catalysis, the characteristics of FePS 3 in broad wavelength range have been proven by many experimental studies. However, FePS 3 has not been used as a saturable absorber (SA) in fiber lasers yet. We propose and demonstrate the generation of a single wavelength and dual-wavelength based on an Er-doped fiber laser (EDFL) at 1.5 μ m by using an innovative FePS 3 saturable absorber for the first time. The result shows that a stable passively Q-switched pulse can be generated, which demonstrates that the new two-dimensional (2D) material FePS 3 served as SA provides a valid method to realize passively Q-switched laser. In addition, we achieve the output of the dual-wavelength pulse by properly rotating the polarization controller. To the best of our knowledge, the dual-wavelength pulse EDFL could be applied in biomedicine, spectroscopy, and sensing research.

Saturable absorption

Polarization controller

10.1088/1674-1056/28/8/084208

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Citations (12)

Distinct Laser Dynamics from a Single Figure-Eight Laser with an Integrated Nonlinear Waveguide

OSA Advanced Photonics Congress (AP) 2020 (IPR, NP, NOMA, Networks, PVLED, PSC, SPPCom, SOF) (2020)

A. Aadhi Piotr Roztocki Anton V. Kovalev Michael Kues Bennet Fischer

We report a passive mode-locked laser system using a nonlinear amplifying loop mirror configuration with an integrated waveguide, capable of delivering different temporal pulse profiles with adjustable features from a single compact architecture.

Waveguide

Mode-Locking

Integrated Optics

10.1364/np.2020.npm3d.5

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Long-Term Stable Mode-Locked Fiber Laser at 2 μm Based on Black Phosphorus

2017 Asia Communications and Photonics Conference (ACP) (2018)

Xiaoxi Jin Tao Wang Hanshuo Wu Jiaxin Song Jian Wu

We firstly demonstrated a long-term stable mode-locked fiber laser at 2 μm based on a black phosphorus (BP) saturable absorber with up to 20 days operation. Electrochemical delamination strategy exfoliation process was used to prepare the air-stable BP flakes.

Black Phosphorus

Exfoliation joint

Delamination

Mode (computer interface)

Saturable absorption

10.1109/acp.2018.8595966

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Stable noise-like pulse generation from a NALM-based all-PM Tm-doped fiber laser

Optics Express (2022)

Bo Ren Can Li Tao Wang Kun Guo Pu Zhou

An all-polarization maintaining (PM) noise-like pulse (NLP) generation from a Tm-doped fiber oscillator based on nonlinear amplifying loop mirror (NALM) that incorporated with a phase shifter and a chirped fiber Bragg grating (CFBG) is experimentally demonstrated. The 3 dB bandwidth of the output spectrum is 25 nm at the central wavelength of 1950 nm, and the maximum output average power is 13.6 mW with the repetition rate of 3.25 MHz. The noise performances of the NLP are for the first time systematically examined, and it shows an improving tendency with the increasing of the output power. At an integration frequency range from 1 kHz to 1 MHz, the minimum estimated timing jitter and the rms RIN is 139 ps and 0.58%, respectively. In addition, the long-term stable operation of the laser is verified through monitoring the output spectrum and average power.

Fiber Bragg Grating

10.1364/oe.464046

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Citations (17)

Intracavity third-harmonic generation in a continuous-wave/self-mode-locked semiconductor disk laser

Chinese Optics Letters (2023)

Chunling Li Jia Cheng Renjiang Zhu Tao Wang Lidan Jiang

The high peak power of picosecond pulses produced by a self-mode-locked semiconductor disk laser can effectively improve the efficiency of nonlinear frequency conversion. This paper presents the intracavity frequency tripling in a self-mode-locked semiconductor disk laser, and a picosecond pulse train at 327 nm wavelength is achieved. The pulse repetition rate is 0.49 GHz, and the pulse width is 5.0 ps. The obtained maximum ultraviolet output power under mode locking is 30.5 mW, and the corresponding conversion efficiency is obviously larger than that of continuous-wave operation. These ultraviolet picosecond pulses have high spatial and temporal resolution and can be applied in some emerging fields.

Disk laser

Picosecond

Mode-Locking

Continuous wave

10.3788/col202321.051404

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Dark pulse generation based on black phosphorus in a Yb-doped fiber laser

2022 20th International Conference on Optical Communications and Networks (ICOCN) (2019)

Tao Wang Xiaoxi Jin Jian Wu Pu Zhou

We demonstrated the dark pulse in a Yb-doped fiber laser based on black phosphorus (BP). The dark pulse could be obtained by adjusting intra-cavity polarization state and pump power. The dark pulse operating at fundamental frequency has the high stability with a signal to noise ratio (SNR) of ~53dB. By only adjusting the polarization state in the cavity, the high-order dark pulses were also observed.

Black Phosphorus

10.1117/12.2523128

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Scattering mechanism of aircraft wake vortices generated in clear air

IEEE Radar Conference (2010)

Jianbing Li Xuesong Wang Tao Wang

In order to provide help to the development of radar detection technology on wake vortices, the scattering mechanism of wake vortices is studied. The dielectric constant of wake vortices is divided into two terms regarding the density variation and water vapor variation, respectively. The effects of these two variations on the RCS of wake vortices are investigated to find the scattering mechanism. Research findings show that in the low frequency band, the density variation is the dominant factor to the total RCS of wake vortex; while in the high frequency band, the dominant factor turns to be the water vapor variation.

Wake turbulence

Variation (astronomy)

Forward scatter

10.1109/radar.2010.5494642

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Citations (5)

Theoretical ultraslow bright and dark optical solitons in cascade-type GaAs/AlGaAs multiple quantum wells

Optics Communications (2012)

Wei Yan Tao Wang Xiaoming Li

10.1016/j.optcom.2012.04.021

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Citations (11)

Over 150 nJ, sub-100 fs, all-fiber Mamyshev oscillator

Eighth Symposium on Novel Photoelectronic Detection Technology and Applications (2022)

Tao Wang Bo Ren Can Li Jian Wu Rongtao Su

An all fiber-based Mamyshev oscillators (MO) is experimentally demonstrated to achieve high energy pulse output. In this high energy MO system, the maximum single pulse energy of 153 nJ was achieved with 1.5 W average power. The pulse width could be externally compressed to < 100 fs by a pair of diffraction gratings. Considering the insertion loss of gratings, the maximum peak power was >1 MW. Meanwhile, this system is verified to have good long-term stability and can run several hours stably. This is the highest record in pulse energy from the all fiber-based ultrafast laser oscillator with picosecond/femtosecond pulse duration, to the best of our knowledge. Such a high energy oscillator could apply a promising source for laser micromachining, advanced fabrication, biomedical imaging, and other practical applications.

10.1117/12.2625192

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Citations (5)