Results 21 to 30 of about 1,228,728 (251)

High-speed pulse train amplification in semiconductor optical amplifiers with optimized bias current [PDF]

, 2017
In this paper, we have experimentally investigated the optimized bias current of semiconductor optical amplifiers (SOAs) to achieve high-speed input pulse train amplification with high gain and low distortion.
Ghafouri-Shiraz, H., Hou, Lianping, Kelly, Anthony E., Xia, Mingjun   +3 more
core   +1 more source

A Single-Stage High Power Factor Power Supply for Providing an LED Street-Light Lamp Featuring Soft-Switching and Bluetooth Wireless Dimming Capability

Energies, 2021
Light-emitting diode (LED) has the characteristics of environmental protection and energy saving, having become the lighting source of a new generation of street-light lamps.
Chun-An Cheng, Hung-Liang Cheng, Chien-Hsuan Chang, En-Chih Chang, Wei-Shiang Hung, Chin-Chih Lai, Long-Fu Lan   +6 more
doaj   +1 more source

A Hybrid Indoor Ambient Light and Vibration Energy Harvester for Wireless Sensor Nodes

Sensors, 2014
To take advantage of applications where both light and vibration energy are available, a hybrid indoor ambient light and vibration energy harvesting scheme is proposed in this paper.
Hua Yu, Qiuqin Yue, Jielin Zhou, Wei Wang   +3 more
doaj   +1 more source

A switched‐capacitor‐assisted wireless power transfer system with regulating TX power and fast global loop

Electronics Letters, 2022
Wireless power transfer systems demand a regulating transmitter (TX) for global loop control and also a regulating receiver (RX) for its local loop. This design broadens the TX output power range, by merging a switched capacitor (SC) circuit with only 3 ...
Chenyu Huang, Yan Lu, Chenchang Zhan, Rui P. Martins   +3 more
doaj   +1 more source

A review on flicker-free ac-dc LED drivers for single-phase and three-phase ac power grids [PDF]

, 2019
Light-Emitting Diodes (LEDs) are coming strongly into the lighting market due to their advantages over conventional lighting solutions: energy efficient, controllable in both light and color, long lifetime, lack of a warm-up period and high power density.
Arias Pérez de Azpeitia, Manuel, Castro Álvarez, Ignacio, González Lamar, Diego, Hernando Álvarez, Marta María, Sebastián Zúñiga, Francisco Javier, Vázquez Ardura, Aitor   +5 more
core   +2 more sources

Study on the Influence of Light Intensity on the Performance of Solar Cell

International Journal of Photoenergy, 2021
In order to solve the problem that the influence of light intensity on solar cells is easily affected by the complexity of photovoltaic cell parameters in the past, it is proposed based on the influence of light intensity on the power generation ...
Zhe Li, Jian Yang, Pouya Asareh Nejad Dezfuli   +2 more
doaj   +1 more source

Efficient routing of single photons by one atom and a microtoroidal cavity [PDF]

, 2009
Single photons from a coherent input are efficiently redirected to a separate output by way of a fiber-coupled microtoroidal cavity interacting with individual Cesium atoms.
A. S. Parkins, Barak Dayan, C. A. Regal, C. W. Gardiner, D. J. Alton, E. Ostby, H. J. Kimble, K. J. Vahala, Takao Aoki   +8 more
core   +2 more sources

Generation of femtosecond light pulses in the near infrared around λ = 850 nm [PDF]

, 1986
Femtosecond light pulses tunable between 840 nm and 880 nm are generated in a synchronously pumped ring dye laser. The laser emits nearly bandwidth-limited pulses (Δv tp = 0.45) with pulse durations down to 65 fs.
Dietel, Fork, Fork, Fork, Fork, H.H. Schulz, J. Dobler, Kühlke, Maier, Nuss, Smith, Stix, Valdmanis, W. Zinth   +13 more
core   +1 more source

Theoretical analysis and experiment of subwavelength structure-integrated red AlGaInP light-emitting diodes for uniform field distribution and enhanced light extraction efficiency

AIP Advances, 2016
We report theoretical and experimental analysis of antireflective subwavelength structures (SWSs) on GaP substrates to enhance the light output with a uniform light distribution of AlGaInP-based red light-emitting diodes (LEDs).
Gil Ju Lee, Young Min Song
doaj   +1 more source

Study on wind-light-pumped-storage combined complementary power generation system

Gong-kuang zidonghua, 2017
In view of problems that waste mine can easily cause surface subsidence and soil erosion, the paper proposed to transform corresponding underground area into pumped-storage power station, and then combined with wind-light complementary system to ...
WEN Ying, WU Shenglei
doaj   +1 more source