Handing Xia

China Academy of Engineering Physics

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Heping Li

University of Electronic Science and Technology of China

Baicheng Yao

University of Electronic Science and Technology of China

Teng Tan

University of Electronic Science and Technology of China

Yong Liu

University of Electronic Science and Technology of China

Yunjiang Rao

University of Electronic Science and Technology of China

Mengqiu Fan

China Academy of Engineering Physics

Bing Chang

University of Electronic Science and Technology of China

Junwen Zheng

China Academy of Engineering Physics

Shangjian Zhang

National Engineering Research Center of Electromagnetic Radiation Control Materials

Jin Huang

Shanghai Pudong New Area Gongli Hospital

Cooperative Institutions

University of Electronic Science and Technology of China

China Academy of Engineering Physics

Chinese Academy of Sciences

National Engineering Research Center of Electromagnetic Radiation Control Materials

Laser Fusion Research Center

Shanghai Jiao Tong University

Laser Research Institute

Chongqing University

Peking University

Tsinghua University

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Dark pulse generation in a dispersion-managed fiber laser

Laser Physics (2011)

Hongwei Li Handing Xia Zhimin Jing J. K. Liao Xionggui Tang

We report an experimental observation of dark pulse generation in a dispersion-managed erbium-doped fiber laser with net anomalous cavity group-velocity dispersion. It is found that apart from the bright soliton pulses, dark pulses with spectral sidebands could be obtained in the laser under appropriate operating conditions. The generation of dark pulses may be attributed to soliton shaping in the cavity.

10.1134/s1054660x12010094

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Citations (13)

Low-loss polarization-maintaining terahertz fiber based on central air hole movements

Optical Engineering (2018)

Zhiqing Wu Qingzhi Li Handing Xia Zhaohua Shi Xiaoyan Zhou

We report a type of single-hole core photonic crystal fiber for low-loss polarization-maintaining terahertz (THz) wave guidance. Simulation results show that high birefringence at a level of 10 − 2 can be obtained by a design of minor position adjustment of the central air hole. Low effective material loss can be achieved because of the introduced central air hole. The strategy of the central air hole movements is also applicable for the three-hole core THz photonic crystal fibers. Other transmission characteristics including single-mode condition, power fraction, confinement loss, and dispersion were discussed in detail. It is quite clear that the proposal facilitates the fabrication process due to the simple structure.

10.1117/1.oe.57.4.046113

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Citations (1)

Observation of Wavelength Tuning in a Mode-Locked Figure-9 Fiber Laser

Photonics (2023)

Han Zhang Handing Xia Mengqiu Fan Junwen Zheng Jianbin Li

We demonstrate an all-PM Er-doped soliton mode-locked fiber oscillator based on the figure-9 configuration with a compact adjustable reflection-type non-reciprocal phase shifter. An analytical model based on the Jones matrix is established to simulate the wavelength tuning phenomenon. Experimentally, it is observed that the increase in pump power results in a significant redshift in the spectrum of output pulses. When the angle of the half-wave plate is rotated in one direction, the output spectrum is redshifted and then blueshifted successively. Good qualitative agreement is presented between the simulations and the experimental results. It is shown that the increase in pump power changes the nonlinear phase shift, which causes the redshift of the transmittance curves at the laser output port. In contrast, the rotation of wave plates not only changes the nonlinear phase shift difference, but also causes variations in linear phase bias and modulation depth. The changes in these parameters lead to the redshift and blueshift of the transmission curves, which enables wavelength tuning.

Blueshift

10.3390/photonics10020184

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Citations (8)

Coherently octave-spanned soliton laser comb using nonlinearly merged Kelly sidebands

Asia Communications and Photonics Conference 2021 (2021)

Wang Chun Bing Chang Handing Xia Teng Tan Yunjiang Rao

A mode-locked fiber soliton laser comb using Raman amplified asymmetric Kelly radiation is reported. It directly demonstrates an all-in-one plug-and-play device with octave-span spectrum (1100-2200nm), >3.2 nJ pulse energy and -168 dBc/Hz@10 kHz phase noise.

Comb filter

Mode-Locking

10.1364/acpc.2021.t2i.4

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Citations (0)

Passively Q-switched linear-cavity erbium-doped fiber laser based on graphene saturable absorber

2022 20th International Conference on Optical Communications and Networks (ICOCN) (2013)

Da Lv Heping Li Handing Xia Shangjian Zhang Yang Liu

We demonstrate a passively Q-switched erbium-doped fiber laser (EDFL) based on graphene as a saturable absorber (SA). Two fiber Bragg gratings (FBGs) are used as the end mirrors in an all-fiber linear cavity. The Q-switched EDFL has a pump threshold of 68.2 mW. The minimum pulse duration is 0.85 μs and the highest pulse energy is 40.9 nJ. The pulse repetition rate of the fiber laser can be widely changed from 51.1 to 118.1 kHz by increasing the pump power from 68.2 to 400 mW.

Saturable absorption

Pulse duration

Erbium

Fiber Bragg Grating

Q-switching

10.1109/icocn.2013.6617209

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Citations (4)

Dispersive Fourier transform based dual-comb ranging

Research Square (Research Square) (2023)

Baicheng Yao Bing Chang Teng Tan Junting Du Zeping Wang

Abstract Laser-based light detection and ranging (LIDAR) offering a powerful tool to real-timely map spatial information with exceptional accuracy, owns various applications ranging from industrial manufacturing, remote sensing, to airborne and in-vehicle missions. Over the past two decades, the rapid advancements of optical frequency combs have ushered in a new era for LIDAR, promoting measurement precision to quantum noise limited level. For comb LIDAR systems, to further improve the comprehensive performances and reconcile inherent conflicts between speed, accuracy, and ambiguity range, innovative demodulation strategies become crucial. Here we report a dispersive Fourier transform (DFT) based LIDAR method utilizing phase-locked Vernier dual soliton laser combs. We demonstrate that after in-line pulse stretching, the delay of the flying pulses can be identified via the DFT-based spectrally interferometric measurement instead of pulse-fitting in time domain. This enables absolute distance measurements with precision starting from 262 nm in single shot, to 2.8 nm after averaging 1041 times, in a non-ambiguity range over 1.7 km. Furthermore, our DFT-based LIDAR method distinctly demonstrates an ability to completely eliminate dead zones. Such an integration of frequency-resolved ultrafast analysis and dual comb ranging technology may pave a way for the design of future LIDAR systems.

Ranging

10.21203/rs.3.rs-3468601/v1

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Citations (1)

Intelligent Active Nonlinear Vibration Control of Four-Corner Simply Supported Bi-Stable Laminates Based on Fuzzy Controller

Journal of Vibration Engineering & Technologies (2025)

Handing Xia Y.X. Hao Wei Zhang

Active Vibration Control

10.1007/s42417-024-01610-x

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Citations (0)

Nanosecond pulse generation in a graphene mode-locked erbium-doped fiber laser

Optics Communications (2014)

Handing Xia Heping Li Zegao Wang Yuanfu Chen Xiaoxia Zhang

Nanosecond

Saturable absorption

Pulse duration

Mode-Locking

Erbium

10.1016/j.optcom.2014.05.048

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Citations (25)

Low-loss polarization-maintaining THz photonic crystal fiber with a triple-hole core

Applied Optics (2017)

Zhiqing Wu Xiaoyan Zhou Handing Xia Zhaohua Shi Jin Huang

In this paper, we report a novel low-loss and polarization-maintaining terahertz (THz) photonic crystal fiber with a triple-hole unit inside the core. The properties of birefringence, effective material loss, confinement loss, bending loss, power fraction, dispersion, and single-mode condition are analyzed in detail by using the finite element methods. Simulation results show that high birefringence at a level of 10-2 can be achieved by simply reducing the diameter of one air hole of the triple-hole core. And low effective material loss down to 30% of its bulk material loss can be achieved in our interested band around 3 THz, due to the high core porosity of the designed triple-hole core. Moreover, this design dramatically facilitates the fabrication process, because of the typical hexagonal structure with all circular air holes and avoiding the troublesome multiple sub-wavelength air holes in the core area. The results reveal that this proposal has potential for efficient THz transmission and other functional applications.

Transmission loss

10.1364/ao.56.002288

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Citations (23)

Coherent optical frequency combs: From principles to applications

Journal of Electronic Science and Technology (2022)

Hao Zhang Bing Chang Zhao‐Yu Li Yupei Liang Chenye Qin

A coherent optical frequency comb is a kind of broad-spectrum light sources delivering equidistant frequencies, and correspondingly its temporal waveform appears as a sequence of ultrashort pulses. Being the cornerstone technology of today's laser and time-frequency disciplines, it effectively links the optical frequency and the microwave frequency, and has promoted the development of diverse applications, such as precision spectroscopy, optical measurement, coherent optical communications, and optical clocks in the past two decades. In this review, we comprehensively introduce the development path, physical principle, generation/tuning methods, and advanced applications of optical frequency combs.

Equidistant

Optical frequency comb

Optical path

10.1016/j.jnlest.2022.100157

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Citations (22)