Talk:Wireless energy transfer/Laser: Difference between revisions
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The benefits of Laser based energy are: |
The benefits of Laser based energy are: |
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#[[collimated]] monochromatic [[wavefront]] propagation allows narrow beam cross-section area for energy confinement over large ranges. {{fact}} |
#[[collimated]] monochromatic [[wavefront]] propagation allows narrow beam cross-section area for energy confinement over large ranges. {{fact}} |
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http://nobelprize.org/educational_games/physics/laser/facts/index.html |
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"Every part of the beam has (almost) the exact same direction and the beam will therefore diverge very little. With a good laser an object at a distance of 1 km (0.6 mile) can be illuminated with a dot about 60 mm (2.3 inches) in radius. |
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As it is so parallel it can also be focused to very small diameters where the concentration of light energy becomes so great that you can cut, drill or turn with the beam. It also makes it possible to illuminate and examine very tiny details." |
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http://nobelprize.org/educational_games/physics/laser/facts/applications.html |
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http://nobelprize.org/educational_games/physics/laser/facts/use.html |
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http://nobelprize.org/educational_games/physics/laser/facts/history.html |
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([[Special:Contributions/63.146.69.17|63.146.69.17]] ([[User talk:63.146.69.17|talk]]) 20:36, 4 November 2008 (UTC)) |
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#compact size of [[solid state laser]]s-[[photovoltaics]] allows ease of integration into products with small form factors. {{fact}} |
#compact size of [[solid state laser]]s-[[photovoltaics]] allows ease of integration into products with small form factors. {{fact}} |
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#ability to control [[radio-frequency]] interference to existing communication devices i.e. [[wi-fi]] and [[cell phone]]s. {{fact}} |
#ability to control [[radio-frequency]] interference to existing communication devices i.e. [[wi-fi]] and [[cell phone]]s. {{fact}} |
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Revision as of 20:36, 4 November 2008
Laser
The benefits of Laser based energy are:
- collimated monochromatic wavefront propagation allows narrow beam cross-section area for energy confinement over large ranges. [citation needed]
http://nobelprize.org/educational_games/physics/laser/facts/index.html "Every part of the beam has (almost) the exact same direction and the beam will therefore diverge very little. With a good laser an object at a distance of 1 km (0.6 mile) can be illuminated with a dot about 60 mm (2.3 inches) in radius. As it is so parallel it can also be focused to very small diameters where the concentration of light energy becomes so great that you can cut, drill or turn with the beam. It also makes it possible to illuminate and examine very tiny details."
http://nobelprize.org/educational_games/physics/laser/facts/applications.html http://nobelprize.org/educational_games/physics/laser/facts/use.html http://nobelprize.org/educational_games/physics/laser/facts/history.html (63.146.69.17 (talk) 20:36, 4 November 2008 (UTC))
- compact size of solid state lasers-photovoltaics allows ease of integration into products with small form factors. [citation needed]
- ability to control radio-frequency interference to existing communication devices i.e. wi-fi and cell phones. [citation needed]
- control of Wireless Energy Access, instead of omnidirectional transfer where there can be no authentication before transfer. [citation needed]
These allow laser-based Wireless Energy Transfer concept to compete with RF or inductive methods. [citation needed]
The Laser "powerbeaming" technology has been mostly explored in military weapons (in Directed-energy_weapons[1] [2]) and aerospace Laser_propulsion [3] [4] applications and is now being developed for commercial low-power applications. [citation needed] Wireless energy transfer system using laser for consumer space has to meet critical Laser safety requirements standardized under IEC 60825. [citation needed]
Laser beam propagation
The wiki Laser page has "Laser light is usually spatially coherent, which means that the light either is emitted in a narrow, low-divergence beam, or can be converted into one with the help of optical components such as lenses.".
The page on diffraction has the following information on diffraction of a spatially coherent monochromatic beam "http://en.wikipedia.org/wiki/Diffraction#Propagation_of_a_laser_beam".
Is this a sufficient source for point (63.146.69.17 (talk) 23:29, 17 October 2008 (UTC))
Spatial and Temporal Coherence in a Laser beam
- http://www.rp-photonics.com/coherence.html
- http://scienceworld.wolfram.com/physics/SpatialCoherenceScale.html(63.146.69.17 (talk) 00:36, 18 October 2008 (UTC))