Article
Engineering, Electrical & Electronic
Lingling Hua, Bihui Zhuang, Jinrong Tian, Yanrong Song, Peng Zhang, Qiang Kan, Lingjuan Zhao
Summary: A 1.3 GHz optically pumped passively mode-locked semiconductor disk laser was used to achieve a high wavelength, short pulse duration, and average output power. By investigating the epitaxy structure of wafer and thermal characteristics of gain chip, methods to improve the laser performance were proposed.
JOURNAL OF LIGHTWAVE TECHNOLOGY
(2022)
Article
Engineering, Electrical & Electronic
Jian Feng, Bo Meng, Cunzhu Tong, Andreas Popp, Berthold Schmidt, Lijie Wang, Huanyu Lu, Yanjing Wang, Xin Zhang, Lijun Wang
Summary: This study reports an in-well and barrier coupling pump scheme for a semiconductor disk laser, which significantly improves the output power compared to the in-well pump only scheme under similar thermal load conditions. The power scaling of the coupling pump SDL is caused by the interaction dynamics of the photoexcited carrier between the quantum-well and barrier regions.
IEEE PHOTONICS JOURNAL
(2022)
Article
Chemistry, Physical
Yaoyao Liu, Yuxuan Wang, Ming Yang, Qiang Wu, Zhixuan Li, Chunling Zhang, Jianmin Zhang, Jianghong Yao, Jingjun Xu
Summary: This study successfully fabricated 102-nm-period deep-subwavelength ripples on the ZnO surface using metal-film-assisted femtosecond laser processing, reducing the period of the ripples and decreasing the damage threshold by changing the material surface structure.
APPLIED SURFACE SCIENCE
(2022)
Article
Chemistry, Multidisciplinary
Yaroslava Andreeva, Alexander Suvorov, Evgeniy Grigoryev, Dmitry Khmelenin, Mikhail Zhukov, Vladimir Makin, Dmitry Sinev
Summary: This article presents a high-speed single-step approach for fabricating highly ordered nanocomposite gratings and demonstrates their potential applications in optical and photovoltaic devices.
Article
Chemistry, Multidisciplinary
S. Wu, Y. Fu, Q. Liu, P. Xiong, D. Wang, G. Zhang, S. Yuan, Y. Chen
Summary: This study reports a bismuth-doped cyan phosphor, SrLaGaO4:Bi3+, which solves the cyan gap in phosphor-converted white light-emitting diodes. The properties of the phosphor were systematically investigated, and its performance in full-spectrum white light-emitting diode devices was evaluated. The results show that SrLaGaO4:Bi3+ plays an essential role in bridging the cyan gap and provides new possibilities for full-spectrum white lighting.
MATERIALS TODAY CHEMISTRY
(2022)
Article
Chemistry, Multidisciplinary
Matteo Mastellone, Alessandro Bellucci, Marco Girolami, Valerio Serpente, Riccardo Polini, Stefano Orlando, Antonio Santagata, Elisa Sani, Frank Hitzel, Daniele M. Trucchi
Summary: This study demonstrates, for the first time, the achievement of two-dimensional laser-induced periodic surface structures with deep-subwavelength periodicity on diamond surfaces. The method involves using two temporally delayed and cross-polarized femtosecond-laser pulses to achieve distinctive nanotexturing, which can be controlled by varying the number of pulses. The effective treatment of large areas of diamond surfaces under scanning mode leads to significantly enhanced absorptance in the visible range, paving the way for the development of metasurfaces for future diamond-based optoelectronic devices.
Article
Physics, Multidisciplinary
Zhang Fu-Ling, Fu Li-Shan, Hu Pi-Li, Han Wen-Jie, Wang Hong-Zhuo, Zhang Feng, Guan Bao-Lu
Summary: This paper proposes a design scheme for a 795-nm VCSEL laser with a sub-wavelength grating-coupled cavity, and through theoretical analysis and finite element method, demonstrates the effectiveness of achieving linewidth narrowing in a multi-cavity coupled structure.
ACTA PHYSICA SINICA
(2021)
Article
Optics
Esrom Kifle, Florent Starecki, Pavel Loiko, Solenn Cozic, Franck Joulain, Thibaud Berthelot, Thierry Georges, Dragan Stojcevski, Damien Deubel, Patrice Camy
Summary: A red praseodymium fiber laser with high output power and slope efficiency, achieving single-mode output, provides a promising concept for the development of diode-pumped high brightness watt-level visible praseodymium fiber lasers.
Article
Optics
Qi Wen, Elena Fadeeva, Shaul Hanany, Juergen Koch, Tomotake Matsumura, Ryota Takaku, Karl Young
Summary: A 1030 nm laser with high power is used to ablate subwavelength structures on alumina and sapphire, achieving significantly higher ablation rates than previous studies. A model connecting structure height to laser fluence is proposed for predicting average ablation rates.
OPTICS AND LASER TECHNOLOGY
(2021)
Article
Materials Science, Coatings & Films
Zihao Chen, Wenlei Sun, Yong Huang, Haonan Zhou, Kaixin Yang, Jing Lu
Summary: This study used high-speed laser metal deposition (LMD) technology to repair 316L austenitic stainless steel and found that laser energy density could affect the forming and properties. With increasing laser energy density, the size of crystal grains in the repair zone increased, and the microhardness first increased and then decreased. The mechanical properties of the repaired specimens were superior to the substrate at room temperature and positively correlated with laser energy density.
SURFACE & COATINGS TECHNOLOGY
(2022)
Article
Optics
Bing Wang, Yang Wang, Haiying Song, Yee Cheong Lam, Elshaimaa Memara Shaymaa, Shibing Liu
Summary: This study aims to explore the formation mechanism of linearly polarized femtosecond laser-induced periodic nanostructures on a metal surface. Through experimental and simulation results, we found that the stabilized periodic interface electrostatic field arising from surface phase-locking resonance is the main cause of self-formation of ripple structures. The kinetics of ultrafast laser ablation on solid surface were investigated, and the threshold fluence and upper limit fluence for self-formation of ripple structures were calculated.
OPTICS AND LASER TECHNOLOGY
(2023)
Article
Materials Science, Ceramics
Zhao Zhang, Jianing Li, Xigui Sun, Fukun Ma, Zhuanzhuan Zhang, Chuanwei Shi, Yajiang Li, Chuanjie Li, Bo Zhao, Zhangyan Liu, Xinyi Jiang, Qingwei Liu, Shunxi Han, Cainian Jing
Summary: The KF110-Si3N4-La2O3-Cu composite coatings fabricated on TA2 by laser cladding exhibited nanocrystalline phases and amorphous phases, where the addition of Cu enhanced wear resistance and alloy elements improved high temperature oxidation resistance, but excessive Si3N4 addition increased coating brittleness.
INTERNATIONAL JOURNAL OF APPLIED CERAMIC TECHNOLOGY
(2022)
Article
Optics
Anthony C. LoCurto, Michael A. Welch, Travis R. Sippel, James B. Michael
Summary: Supercontinuum laser absorption spectroscopy is used for temperature and column density measurements of key metal combustion intermediates in energetic material combustion fireball environments. The study demonstrates the feasibility of broadband visible metal-oxide absorption thermometry and reveals the potential for multispecies monitoring in dynamic fireball environments.
Article
Optics
Yina Hai, Yonggang Zou, Jie Fan, He Zhang, Haizhu Wang, Ling Zhu, Xiaohui Ma
Summary: This research introduces a novel method for obtaining narrow linewidth semiconductor lasers with low far-field divergence angle, which are simple to fabricate and easy to integrate.
OPTICS COMMUNICATIONS
(2021)
Article
Multidisciplinary Sciences
Bhupesh Kumar, Ran Homri, Patrick Sebbah
Summary: A two-dimensional solid-state random laser emitting in the visible is demonstrated by controlling the arrangement of air-holes in a dye-doped polymer film. The laser emission can be tuned by adjusting scatterer density and pump area. The spatial coherence of the laser can be controlled by varying pump area. This 2D random laser provides a compact on-chip tunable laser source and a platform for studying non-Hermitian photonics in the visible.
SCIENTIFIC REPORTS
(2023)