Results 11 to 20 of about 482,559 (249)

Operation of an optical in-well-pumped vertical-external-cavity surface-emitting laser [PDF]

, 2006
We report the operation of an optical in-well-pumped vertical-external-cavity surface-emitting laser. The laser delivers 1 W at 855 nm and is pumped with a cost-effective fiber-coupled laser diode emitting at 806 nm.
Ferguson, Allister I., McGinily, Stephen, Schmid, Marc, Ackemann, Thorsten, Zhang, Wei, Riis, Erling   +5 more
core   +4 more sources

Intra-cavity frequency doubling of an electrically pumped edge-emitting 980 nm laser diode with PPLN [PDF]

, 2009
The growing trend for laser-based projection displays makes intra-cavity frequency doubling (ICFD) of electrically and optically surface emitting diode lasers in the near IR region become more interesting [1-3].
Gawith, C.B.E., Li, Kang, Aiyun Yao, Yao, Aiyun, Knight, Ian G., C.B.E. Gawith, Copner, N.J., Kang Li, N.J. Copner, Ian G. Knight   +9 more
core   +2 more sources

Nanofabrication of gallium nitride photonic crystal light-emitting diodes [PDF]

, 2010
We describe a comparison of nanofabrication technologies for the fabrication of 2D photonic crystal structures on GaN/InGaN blue LEDs. Such devices exhibit enhanced brightness and the possibility of controlling the angular emission profile of emitted ...
Rahman, Faiz, Rahman, F., De La Rue, Richard M., Parsons, K., Z. Khokhar, Ali, J. Abbott, Steve, D. Dawson, Martin, P. Johnson, Nigel, Abbott, Steve J., Watson, I.M., Charlton, Martin D.B., MacIntyre, D.S., Watson, I.A., MacIntyre, Douglas S., Xiong, C., Charlton, Martin, Johnson, N.P., Hubbard, G., De La Rue, R.M., Gong, Zheng, M. De La Rue, Richard, Charlton, M.D.B., Gu, E., Johnson, Nigel P, Abbott, S.J., S. Macintyre, Douglas, M. Watson, Ian, Macintyre, Douglas S, Tillin, Martin, Johnson, Nigel P., Massoubre, D., Rue, Richard M. De La, Xiong, Chang, Khokhar, A.Z., Watson, Ian M., Gu, Erdan, D.B. Charlton, Martin, Hubbard, Graham, Dawson, M.D., Gong, Z., Tillin, M., Massoubre, David, Khokhar, A.Z, Khokhar, Ali Z., Dawson, Martin D., Parsons, Keith, Charlton, M.D.B   +46 more
core   +2 more sources

A Comparative Life Cycle Assessment and Costing of Lighting Systems for Environmental Design and Construction of Sustainable Roads

Buildings, 2023
The management of the life cycle of the transport network is one of the main challenges of sustainable mobility. Roads and highways cause significant damage to the ecosystem. Specifically, lighting systems contribute to climate change, energy consumption,
Alberto Picardo, Manuel J. Galván, Víctor M. Soltero, Estela Peralta   +3 more
doaj   +1 more source

Absorbance based light emitting diode optical sensors and sensing devices [PDF]

, 2008
The ever increasing demand for in situ monitoring of health, environment and security has created a need for reliable, miniaturised sensing devices. To achieve this, appropriate analytical devices are required that possess operating characteristics of ...
O'Toole, Martina, Dermot Diamond, O\u27Toole, Martina, Martina O’Toole, Diamond, Dermot, Martina O’Toole   +5 more
core   +2 more sources

CURRENT STATE OF AUTOMOTIVE LIGHTING EQUIPMENT WITH NON-REPLACEABLE LIGHT SOURCES ON BASIS OF LIGHT-EMITTING DIODE TECHNOLOGIES

Наука и техника, 2012
The paper contains information on the current state of automotive lighting equipment. Different designs of automotive lighting devices, their merits and demerits are described in the paper.
S. P. Sernov, D. V. Balokhonov, T. V. Kolontaeva   +2 more
doaj   +1 more source

Thin-film photonic crystal LEDs with enhanced directionality [PDF]

, 2009
The use of photonic crystals for light extraction from light-emitting diodes (LEDs) gives the possibility to shape the farfield emission pattern. This is of particular interest for étendue-limited LED applications that require a more directional ...
Bergenek, Krister, N. Linder, K. Bergenek, R. Wirth, K. Streubel, Ch. Wiesmann, H. Zull, T. F. Krauss, C. Rumbolz   +8 more
core   +1 more source

Light-Emitting Diode (LED) versus High-Pressure Sodium Vapour (HPSV) Efficiency: A Data Envelopment Analysis Approach with Undesirable Output

Energies, 2022
Road lighting is essential to ensure the safety and comfort of its users, especially in preventing accidents and aiding visual tasks. The monumental shift from conventional road lighting technology to light-emitting diode (LED) lighting is driven by ...
Nina Sakinah Ahmad Rofaie, Seuk Wai Phoong, Muzalwana Abdul Talib @ Abdul Mutalib   +2 more
doaj   +1 more source

Machine vision based in-process light-emitting diode chip mounting system

Measurement + Control, 2018
Background: In this study, a machine vision–based method was developed for automated in-process light-emitting diode chip mounting lines with position uncertainty.
Chao-Ching Ho, You-Min Chen, Po-Chieh Li
doaj   +1 more source

Advances in Visible Light Communication Technologies and Applications

Photonics, 2022
With the development of light emitting diode (LED) lighting technology and its wide applications, visible light communication (VLC) technology has also seen significant advancements.
Zuhang Geng, Faisal Nadeem Khan, Xun Guan, Yuhan Dong   +3 more
doaj   +1 more source