Photonics Archives – The Green Optimistic green tech news, since 2008 Fri, 13 Mar 2015 18:22:41 +0000 en-US hourly 1 https://wordpress.org/?v=7.0 2667534 Todd Ditmire’s Petawatt Laser: One Step Closer to Nuclear Fusion https://www.greenoptimistic.com/todd-ditmire-petawatt-laser-nuclear-fusion-20091016/ https://www.greenoptimistic.com/todd-ditmire-petawatt-laser-nuclear-fusion-20091016/#comments Fri, 16 Oct 2009 05:53:27 +0000 https://www.greenoptimistic.com/?p=4792 Todd Ditmire, from the University of Texas, has invented a laser device that can produce petawatt power through a process of chirping, that takes a short light pulse (150 femtoseconds) and stretches it out in time, amplifies it to higher energy and then recompresses it to about 100 femtoseconds in time, obtaining 190 joules of energy.

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]]> https://www.greenoptimistic.com/todd-ditmire-petawatt-laser-nuclear-fusion-20091016/feed/ 3 4792 New Method of Guiding Light Through Polymer Helps Solar Cells Get Cheaper https://www.greenoptimistic.com/dendrimer-solar-cell-20091014/ https://www.greenoptimistic.com/dendrimer-solar-cell-20091014/#respond Wed, 14 Oct 2009 06:21:58 +0000 https://www.greenoptimistic.com/?p=4770 New research is paving the pathway towards better and more efficient solar cells, as University of Florida chemists have invented a method of "hacking" the molecular structures of the materials the solar cells are made of, in order to gain a maximum transfer efficiency from them.

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