Green Lasers: The Next Innovation in Chip-Based Beams
in [Physics]
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From: NSA TORTURE TECHNOLOGY, NEWS and RESEARCH on 20 May 2010 03:34 http://www.scientificamerican.com/article.cfm?id=dawn-of-miniature-green-lasers&sc=IDR_50-years-of-the-laser From the April 2009 Scientific American Magazine | 12 comments Green Lasers: The Next Innovation in Chip-Based Beams ( Preview ) Semiconductors can generate laser light in all colors except one. But new techniques for growing laser diodes could soon make brilliant full-spectrum displays a reality Key Concepts a.. Solid-state lasers can produce light in the red and blue parts of the spectrum but not the green. a.. Recent research suggests that this "green gap" could be plugged as early as this year. a.. The advance will allow for laser based video displays that are small enough to fit in a cell phone. On a rainy Saturday morning in January 2007, Henry Yang, chancellor of the University of California, Santa Barbara, took an urgent phone call. He excused himself abruptly from a meeting, grabbed his coat and umbrella, and rushed across the windswept U.C.S.B. campus to the Solid State Lighting and Display Center. The research group there included one of us (Nakamura), who had just received the Millennium Technology Prize for creating the first light-emitting diodes (LEDs) that emit bright blue light. Since that breakthrough over a decade earlier, Nakamura had continued his pioneering research on solid-state (semiconductor) lighting, developing green LEDs and the blue laser diodes that are now at the core of modern Blu-ray disc players. As Yang reached the center about 10 minutes later, people were milling about a small test lab. "Shuji had just arrived and was standing there in his leather jacket asking questions," he recalled. Nakamura's colleagues Steven DenBaars and James C. Speck were speaking with a few graduate students and postdoctoral researchers as they took turns looking into a microscope. They parted for Yang, who peered into the eyepiece to witness a brilliant blue-violet flash emanating from a glassy chip of gallium nitride (GaN). ................................................................. Posted via TITANnews - Uncensored Newsgroups Access >>>> at http://www.TitanNews.com <<<< -=Every Newsgroup - Anonymous, UNCENSORED, BROADBAND Downloads=-
From: bert on 21 May 2010 18:36 On May 20, 3:34 am, "NSA TORTURE TECHNOLOGY, NEWS and RESEARCH" <TortureTechnologyNResea...(a)yahoo.com> wrote: > http://www.scientificamerican.com/article.cfm?id=dawn-of-miniature-gr.... > > From the April 2009 Scientific American Magazine | 12 comments > > Green Lasers: The Next Innovation in Chip-Based Beams ( Preview ) > Semiconductors can generate laser light in all colors except one. But new > techniques for growing laser diodes could soon make brilliant full-spectrum > displays a reality > Key Concepts > > a.. Solid-state lasers can produce light in the red and blue parts of the > spectrum but not the green. > a.. Recent research suggests that this "green gap" could be plugged as early > as this year. > a.. The advance will allow for laser based video displays that are small > enough to fit in a cell phone. > > On a rainy Saturday morning in January 2007, Henry Yang, chancellor of the > University of California, Santa Barbara, took an urgent phone call. He > excused himself abruptly from a meeting, grabbed his coat and umbrella, and > rushed across the windswept U.C.S.B. campus to the Solid State Lighting and > Display Center. The research group there included one of us (Nakamura), who > had just received the Millennium Technology Prize for creating the first > light-emitting diodes (LEDs) that emit bright blue light. Since that > breakthrough over a decade earlier, Nakamura had continued his pioneering > research on solid-state (semiconductor) lighting, developing green LEDs and > the blue laser diodes that are now at the core of modern Blu-ray disc > players. > > As Yang reached the center about 10 minutes later, people were milling about > a small test lab. "Shuji had just arrived and was standing there in his > leather jacket asking questions," he recalled. Nakamura's colleagues Steven > DenBaars and James C. Speck were speaking with a few graduate students and > postdoctoral researchers as they took turns looking into a microscope. They > parted for Yang, who peered into the eyepiece to witness a brilliant > blue-violet flash emanating from a glassy chip of gallium nitride (GaN). > > ................................................................ > Posted via TITANnews - Uncensored Newsgroups Access > >>>> athttp://www.TitanNews.com<<<< > -=Every Newsgroup - Anonymous, UNCENSORED, BROADBAND Downloads=- I invented a white light mechanical pulse laser. Fun to build and could pop red balloons at a distance of 100 feet. TreBert
From: Sam Wormley on 21 May 2010 18:57 On 5/21/10 5:36 PM, bert wrote: > I invented a white light mechanical pulse laser. Fun to build and > could pop red balloons at a distance of 100 feet. TreBerT What ever gave you the idea that your light was coherent?
From: bert on 24 May 2010 09:23 On May 21, 6:57 pm, Sam Wormley <sworml...(a)gmail.com> wrote: > On 5/21/10 5:36 PM, bert wrote: > > > I invented a white light mechanical pulse laser. Fun to build and > > could pop red balloons at a distance of 100 feet. TreBerT > > What ever gave you the idea that your light was coherent? Sam it was not all that "coherent" Not realy a true laser meaning wave lengths the same and no interference. White is not good,but I made it so well focused and with such great intensity that it worked at a maximum of 100 feet. One burst. One quanta of trillions and trillions of photons,and many in the gamma wave length. Could be over your head Sam. TreBert
From: Sam Wormley on 24 May 2010 09:35 On 5/24/10 8:23 AM, bert wrote: > Sam it was not all that "coherent" Not realy a true laser meaning wave > lengths the same and no interference. White is not good,but I made it > so well focused and with such great intensity that it worked at a > maximum of 100 feet. One burst. One quanta of trillions and trillions > of photons,and many in the gamma wave length. Could be over your head > Sam. TreBert In other word you focused some light to a focal length of 100 feet none of which was gamma radiation. Who's head this was over is subject to debate, Herb.
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