Results 121 to 130 of about 882,801 (311)

Linewidth Enhancement Factor in InAs/GaAs Quantum Dot Lasers and Its Implication in Isolator-Free and Narrow Linewidth Applications

IEEE Journal of Selected Topics in Quantum Electronics, 2019
The linewidth enhancement factor ($\alpha _\mathrm{H}$) is an important parameter for semiconductor lasers. In this paper, we investigate, both theoretically and experimentally, the key parameters that affect $\alpha _\mathrm{H}$ of InAs/GaAs quantum dot
Zeyu Zhang, D. Jung, J. Norman, W. Chow, J. Bowers   +4 more
semanticscholar   +1 more source

Excitonic Landscapes in Monolayer Lateral Heterostructures Revealed by Unsupervised Machine Learning

Advanced Optical Materials, EarlyView.
Hyperspectral photoluminescence data from graded MoxW1 − xS2 alloys and monolayer MoS2–WS2 lateral heterostructures are analyzed using unsupervised machine learning. The combined use of PCA, t‐SNE, and DBSCAN uncovers distinct excitonic regions that trace how composition, strain, and defects modulate optical responses in these 2D materials.
Maninder Kaur, Nicolas T. Sandino, Jason P. Terry, Mahdi Ghafariasl, Yohannes Abate   +4 more
wiley   +1 more source

Mode-hop-free wavelength-tunable semiconductor lasers covering the S+C+L band via external-cavity optical feedback

Frontiers in Physics
A wide mode-hop-free and narrow-linewidth tunable laser diode source employing a Littman-Metcalf configuration with a diffraction grating is developed. We conducted a series of experiments to evaluate the tuning characteristics and spectral linewidth of ...
Liwen Sheng, Liwen Sheng, Liwen Sheng, Zhiming Liu, Jianjun Wang, Lei Liu, Bingqi Yin, Zhihui Zhang, Shuai Zhou, Lin Huang, Lin Huang, Lin Huang   +11 more
doaj   +1 more source

2.19 kW narrow linewidth FBG-based MOPA configuration fiber laser.

Optics Express, 2019
In this paper, we demonstrated a monolithic fiber-Bragg-grating-based (FBG-based) master oscillator power amplification configuration fiber laser with a narrow linewidth at high-power level.
Yusheng Huang, P. Yan, Zehui Wang, J. Tian, Dan Li, Q. Xiao, M. Gong   +6 more
semanticscholar   +1 more source

Micromachined Double‐Membrane Mechanically Tunable Metamaterial for Thermal Infrared Filtering

Advanced Photonics Research, Volume 6, Issue 5, May 2025.
Herein, a mechanically tunable double‐layer plasmonic metamaterial leveraging the extraordinary optical transmission effect observed in subwavelength arrays of openings within thin metal layers is presented. The concept is experimentally validated by integrating the proposed metamaterial structure into an electrostatic parallel‐plate actuator to create
Oleg Bannik, Fedor Kovalev, Mingkai Liu, Michal Zawierta, Dilusha Silva, Lorenzo Faraone, Mariusz Martyniuk, Ilya Shadrivov   +7 more
wiley   +1 more source

All Polarization Maintaining Brillouin Erbium-Doped Fiber Laser With Sub-kHz Linewidth Using Saturated Absorber and Self-Injection Feedback

IEEE Photonics Journal
A narrow-linewidth all-polarization-maintaining (PM) Brillouin erbium-doped fiber laser (BEFL) is proposed and demonstrated experimentally, which employs erbium-doped fiber (EDF) acting as both the linear gain and the Brillouin gain medium.
Junsen Yang, Zhengkang Wang, Jianming Shang, Shiyou Xiao, Zhixue Li, Bin Luo, Tianwei Jiang, Song Yu   +7 more
doaj   +1 more source

Accelerating Luminescence in Nanostructures: Exploring the Physical Limits and Impact of Ultrafast Emission in Nanoscale Materials

Advanced Photonics Research, EarlyView.
This review highlights recent advances in accelerating luminescence in nanostructures through cooperative emission, resonator coupling, and nonlocal light–matter interactions. By unifying concepts such as excitonic superradiance, superfluorescence, and the plasmonic Purcell effect, it reveals physical limits of ultrafast emission and their potential ...
Masaaki Ashida, Koichi Okamoto, Takuya Matsuda, Hajime Ishihara   +3 more
wiley   +1 more source

Recent Advances in Tunable External Cavity Diode Lasers

Applied Sciences
A narrow linewidth tunable laser source is a critical component in various fields, including laser radar, quantum information, coherent communication, and precise measurement. Tunable external cavity diode lasers (ECDLs) demonstrate excellent performance,
Yan Wang, Yue Song
doaj   +1 more source

An Efficient Diamond Raman Amplification Scheme Based on Adaptive Temporal Synchronization

Advanced Photonics Research, EarlyView.
This work reveals an adaptive temporal synchronization effect in delayed diamond Raman amplification, where the Stokes pulse shifts toward the fundamental peak. A periodic amplification scheme based on this phenomenon enables efficient pump recycling and enhanced energy conversion, offering a robust, delay‐tolerant strategy for advanced nonlinear ...
Hao Zheng, Zhenxu Bai, Hui Chen, Fei Zhang, Chengjin Shi, Jie Ding, Yulei Wang, Zhiwei Lu   +7 more
wiley   +1 more source

Titanium-doped sapphire laser research and design study [PDF]

Three main topics were considered in this study: the fundamental laser parameters of titanium-doped sapphire, characterization of commercially grown material, and design of a tunable, narrow-linewidth laser.
Moulton, Peter F.
core   +1 more source