Tianshu Wang
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View article: All-fiber self-starting Mamyshev oscillator based on absorption-induced spectral filtering
All-fiber self-starting Mamyshev oscillator based on absorption-induced spectral filtering Open
A self-starting all-fiber Mamyshev oscillator (MO) at 1550 nm is proposed and experimentally demonstrated based on an absorption filter. A shortpass absorption filter is designed based on the strong absorption of Tm 3+ ions near 1560 nm. T…
View article: Shape-Reconfigurable Deployable Paraboloid Reflector Based on a 7R-8R Truss Network
Shape-Reconfigurable Deployable Paraboloid Reflector Based on a 7R-8R Truss Network Open
Progressing beyond the stowage and deployment of reflectors and designing for multiple deployed states result in reflector shape reconfiguration, thus allowing for new functions including radiation pattern reconfiguration, and is valuable …
View article: Wavelength Conversion Process of Intra-Pulse Stimulated Raman Scattering in Near-Zero Negative Dispersion Range
Wavelength Conversion Process of Intra-Pulse Stimulated Raman Scattering in Near-Zero Negative Dispersion Range Open
In the near-zero negative dispersion region of highly nonlinear fiber, the process of wavelength conversion based on the mechanism of intra-pulse stimulated Raman scattering is sensitive to the parameters of pumping pulse and fiber length …
View article: Sulfur-Fumigated Ginger Identification Method Based on Meta-Learning for Different Devices
Sulfur-Fumigated Ginger Identification Method Based on Meta-Learning for Different Devices Open
Since ginger has characteristics of both food and medicine, it has a significant market demand worldwide. To effectively store ginger and achieve the drying and color enhancement effects required for better sales, it is often subjected to …
View article: Ti<sub>3</sub>CN Mxene-microfiber integrated waveguide for high stability four-wave mixing effect generation
Ti<sub>3</sub>CN Mxene-microfiber integrated waveguide for high stability four-wave mixing effect generation Open
The application of two-dimensional (2D) materials in third-order nonlinear optics and integrated waveguide technologies is further explored. Specifically, we synthesized Ti 3 CN MXene via acid etching and subsequently coated it onto highly…
View article: In-Fiber Hybrid Structure Sensor Based on the Vernier Effect for Vector Curvature and Temperature Measurement
In-Fiber Hybrid Structure Sensor Based on the Vernier Effect for Vector Curvature and Temperature Measurement Open
A vector curvature and temperature sensor based on an in-fiber hybrid microstructure is proposed and experimentally demonstrated. The proposed scheme enables the dimensions of the Fabry–Perot and Mach–Zehnder hybrid interferometer to be ad…
View article: Ultra-sensitive pressure sensor with low-temperature crosstalk based on the Vernier effect and helical structure
Ultra-sensitive pressure sensor with low-temperature crosstalk based on the Vernier effect and helical structure Open
What we believe to be a novel high-sensitivity fiber-optic pressure sensor based on the vernier effect and helical structure is proposed and experimentally verified. The sensor utilizes the superposition of higher-order mode Mach-Zehnder i…
View article: Generation of Different Mode-Locked States in Nonlinear Multimodal Interference-Based Fiber Lasers
Generation of Different Mode-Locked States in Nonlinear Multimodal Interference-Based Fiber Lasers Open
A novel mode-locking method based on nonlinear multimode interference (NLMI) using a distributed large-core (105 μm) graded-index multimode fiber (GIMF)-based saturable absorber (SA) capable of generating four pulse modes is proposed. The …
View article: Diverse mode operation fiber laser mode-locked by nonlinear multimode interference
Diverse mode operation fiber laser mode-locked by nonlinear multimode interference Open
We present an all-fiber passively mode-locked (ML) laser with a nonlinear multimode interference (NLMI)-based saturable absorber (SA) capable of generating five pulse modes. The SA consists of two centrally aligned graded index multimode f…
View article: Research on the Influence of STEM Curriculum on Ecological Consciousness for Primary School Students
Research on the Influence of STEM Curriculum on Ecological Consciousness for Primary School Students Open
As a new field of key competencies in the 21st century, environmental competencies have been increasingly focused by social. People also pay more attention to ecological education. This study proposed a kind of STEM curriculum framework an…
View article: 4*10 Gbps WDM communication system based on a tunable V-cavity semiconductor laser
4*10 Gbps WDM communication system based on a tunable V-cavity semiconductor laser Open
This paper is about the V-cavity tunable semiconductor laser with a 1550 nm band used as a transmitter to build a wavelength division multiplexing (WDM) optical fiber communication link. In the experiment, a 20 km optical fiber communicati…
View article: Generation of mode-locked states of conventional solitons and bright-dark solitons in graphene mode-locked fiber laser
Generation of mode-locked states of conventional solitons and bright-dark solitons in graphene mode-locked fiber laser Open
This paper proposes a mode-locked fiber laser based on graphene-coated microfiber. The total length of the fiber laser resonant cavity is 31.34 m. Under the condition of stable output of bright-dark soliton pairs from the fiber laser, dual…
View article: Preparation of AuNP-CQD/PDA/GO anode for MFC and its treatment of oily sewage from ships
Preparation of AuNP-CQD/PDA/GO anode for MFC and its treatment of oily sewage from ships Open
Oily sewage discharged from ships has brought many harms to the marine environment, even endangered marine life and human life. As a new type of water treatment technology, microbial fuel cell (MFC) can efficiently treat pollutants and rec…
View article: Output characteristics of 1 μm all-fiber MOPA structure laser
Output characteristics of 1 μm all-fiber MOPA structure laser Open
主振荡功率放大(main oscillation power amplification, MOPA)结构由于其光束质量良好和参数可调的优点,已成为高功率光纤激光器的主流设计之一。为了改善高功率掺镱光纤激光器(ytterbium-doped fiber laser, YDFL)的输出性能,提高系统的光-光转换效率,文中报道了一台基于915 nm泵浦激光器和双包层掺镱光纤(ytterbium-doped fiber, YDF)的MOPA结构全光纤高功率激光器。该高功率光纤激光…
View article: Switchable soliton molecules and noise-like pulses in hybrid mode-locking fiber laser
Switchable soliton molecules and noise-like pulses in hybrid mode-locking fiber laser Open
不同类型脉冲之间的演化是被动锁模光纤激光器丰富动力学的体现。报道了一种可实现多种脉冲切换的混合锁模光纤激光器，当泵浦功率为400 mW时实现了孤子分子、谐波锁模、孤子簇之间的相互切换。增加泵浦功率至600 mW时获得了类噪声脉冲输出，对应的输出功率和单脉冲能量分别为15.2 mW和0.86 nJ。通过调节偏振控制器实现了类噪声脉冲中心波长从1 895 nm到1 930 nm可调谐。所搭建的激光器具有锁模脉冲可切换，波长可调谐，能自启动等优点。
View article: 2.1 μm Band Dissipative Soliton Resonance Mode-Locked Ho-Doped Tunable Fiber Laser
2.1 μm Band Dissipative Soliton Resonance Mode-Locked Ho-Doped Tunable Fiber Laser Open
We report a 2.1 μm band mode-locked holmium-doped fiber (HDF) laser with tunable wavelength and pulse width in dissipative soliton resonance (DSR) region for the first time to our knowledge. A piece of HDF is pumped by a home-made 1.9 μm b…
View article: Optimization of Rice-Based Double-Cropping System with Conservation Practice Mitigates Carbon Emission While Ensuring Profitability
Optimization of Rice-Based Double-Cropping System with Conservation Practice Mitigates Carbon Emission While Ensuring Profitability Open
Including green manure into a rice-based double-cropping system has effects on both crop production and greenhouse gas (GHG) emissions. Yet, few studies have considered the trade-off between crop productivity, profitability, and carbon foo…
View article: Noise-Like Pulse Generated by All-Fiber Ultrafast Thulium-Doped Fiber Laser Based on Single-Wall Carbon Nanotubes
Noise-Like Pulse Generated by All-Fiber Ultrafast Thulium-Doped Fiber Laser Based on Single-Wall Carbon Nanotubes Open
A noise-like pulse (NLP) thulium-doped fiber laser based on single-wall carbon nanotubes (SWCNTs) has been proposed and demonstrated in this paper, which the microfiber decorated with SWCNTs work as a saturable absorber to generate an ultr…
View article: Demonstration of an optical phase conjugation based dual‐hop PDM‐QPSK free‐space optical communication link
Demonstration of an optical phase conjugation based dual‐hop PDM‐QPSK free‐space optical communication link Open
The dual‐hop free‐space optical (FSO) communication link for polarization‐division multiplexing quadrature phase‐shift keying (PDM‐QPSK) signals is proposed and experimentally demonstrated in an atmospheric chamber with the optical phase c…
View article: Single-wall carbon nanotube assisted all-optical wavelength conversion at 2.05 µm
Single-wall carbon nanotube assisted all-optical wavelength conversion at 2.05 µm Open
We fully demonstrate the special requirements of a mid-infrared all-optical wavelength converter. The construction mechanism of a 2.05 µm all-optical wavelength converter based on the single-wall carbon nanotube (SWCNT) is proposed. System…
View article: MIMO atmospheric transmission characteristics based on spatial light modulator
MIMO atmospheric transmission characteristics based on spatial light modulator Open
大气湍流对无线光通信系统的影响不可忽视,为了更准确地反映实验室模拟多输入、多输出(MIMO)大气湍流信道的实际特征,提出了一种利用相位屏来模拟MIMO大气湍流信道的方法,并针对基于液晶空间光调制器(LC-SLM)的液晶调制法展开研究,通过实验验证该方法的可行性。实验结果表明:通过相位屏模拟MIMO大气湍流信道的激光光斑发生不同程度的畸变,湍流环境下两路激光发射系统比单路发射激光系统功率稳定性好,在前向纠错误差极限(3.8×10−3)下,单个发射单个接收系统的链路代价为10.…
View article: Research Progress on Remote Sensing Classification Methods for Farmland Vegetation
Research Progress on Remote Sensing Classification Methods for Farmland Vegetation Open
Crop planting area and spatial distribution information have important practical significance for food security, global change, and sustainable agricultural development. How to efficiently and accurately identify crops in a timely manner b…