Results 51 to 60 of about 7,683 (202)

A High Power Frequency-Stabilized Tunable Two-Frequency Diode Laser System for the Generation of Coherent THz-Waves by Photomixing [PDF]

, 1998
A tunable two-frequency high-power diode laser system at 850 nm for terahertz (Thz)-wave generation by photomixing in low-temperature-grown GaAs photo-conductors has been developed. The difference frequency is obtained through a three laser system, where
Blake, Geoffrey A., Chen, Pin, Matsuura, Shuji, Pearson, J. C., Pickett, Herbert M.   +4 more
core  

Characterization of Laser Systems at 1550 nm Wavelength for Future Gravitational Wave Detectors

Instruments, 2022
The continuous improvement of current gravitational wave detectors (GWDs) and the preparations for next generation GWDs place high demands on their stabilized laser sources.
Fabian Meylahn, Benno Willke
doaj   +1 more source

Flexible perovskite light‐emitting diodes: A comprehensive review of emission control strategies for enhanced performance

InfoMat, Volume 7, Issue 12, December 2025.
Perovskite light‐emitting diodes (PeLEDs) have gained prominence in next‐generation photonics. This review comprehensively analyzes the latest progress in perovskite materials, device architectures, operational mechanisms, and optimization strategies for functional layers in PeLEDs, with the aim of providing valuable insights and inspiration for ...
Qianying Lin, Xia Yang, Mingbin Zhou, Xiangchuan Meng, Zhihua Xiong, Xiaotian Hu   +5 more
wiley   +1 more source

100 W all fiber picosecond MOPA laser

Optics Express, 2009
A high power picosecond laser is constructed in an all fiber master oscillator power amplifier (MOPA) configuration. The seed source is an ytterbium-doped single mode fiber laser passively mode-locked by a semiconductor saturable absorber mirror (SESAM). It produces 20 mW average power with 13 ps pulse width and 59.8 MHz repetition rate.
Sheng-Ping, Chen, Hong-Wei, Chen, Jing, Hou, Ze-Jin, Liu   +3 more
openaire   +2 more sources

Narrow-Linewidth 2 μm All-Fiber Laser Amplifier with a Highly Stable and Precisely Tunable Wavelength for Gas Molecule Absorption in Photonic Crystal Hollow-Core Fibers

Molecules, 2021
In recent years, mid-infrared fiber lasers based on gas-filled photonic crystal hollow-core fibers (HCFs) have attracted enormous attention. They provide a potential method for the generation of high-power mid-infrared emissions, particularly beyond 4 μm.
Wenxi Pei, Hao Li, Yulong Cui, Zhiyue Zhou, Meng Wang, Zefeng Wang   +5 more
doaj   +1 more source

Floquet‐Engineered Noise‐Resilient Terahertz Receiver with Modular Phased Array Architecture for Scalable Chip‐Scale Communication

Advanced Photonics Research, Volume 6, Issue 11, November 2025.
Overcoming the bandwidth, latency, and power constraints of wired interconnects in multicore processing units, this work introduces a terahertz wireless solution featuring a dual‐carrier modular phased‐array transmitter and a novel 2D semiconductor quantum‐well nanoreceiver.
Kosala Herath, Malin Premaratne, Sergi Abadal, Sharadhi Gunathilake, Eduard Alarcón, Ampalavanapillai Nirmalathas   +5 more
wiley   +1 more source

Structured Optical Receivers for Efficient Deep-Space Communication

, 2017
We discuss conceptual designs for structured optical receivers that can alleviate the requirement for high peak-to-average power ratio in photon-starved optical communication.
Banaszek, Konrad, Jachura, Michał
core   +1 more source

Global–Local Modulated Prototype Attention Network for Spatio-Temporal Crime Prediction

Applied Sciences
Accurate spatial–temporal crime prediction is a critical component of proactive public safety governance, yet it remains challenging due to complex dependency structures and severe data sparsity in real-world crime datasets.
Yuchen Zhao, Yanxia Zhou, Yanli Chen, Hanzhou Wu, Zhicheng Dong   +4 more
doaj   +1 more source

A Novel Analytical Method for Trace Ammonium in Freshwater and Seawater Using 4-Methoxyphthalaldehyde as Fluorescent Reagent

Journal of Analytical Methods in Chemistry, 2015
A novel fluorescent reagent for determination of ammonium, 4-methoxyphthalaldehyde (MOPA), was successfully synthesized in this study. Under alkaline conditions, MOPA could reacted with ammonium rapidly at room temperature, producing fluorescent ...
Ying Liang, Yingming Pan, Qing Guo, Hongzhi Hu, Chancui Wu, Qian Zhang   +5 more
doaj   +1 more source

Hybrid Perovskite‐Photovoltaic and Solar‐Thermal Harvesting

Advanced Science, Volume 12, Issue 42, November 13, 2025.
This study presents a hybrid solar energy harvesting concept that integrates a semi‐transparent perovskite solar module with a thermal collector. High‐energy photons generate electricity at 14.3% efficiency, while ≈55% of low‐energy photons provide heat.
Gan Huang, Parth H. Arya, David B. Ritzer, Nada A. Alati, Bahram Abdollahi Nejand, Ulrich W. Paetzold, Bryce S. Richards   +6 more
wiley   +1 more source