Blue lasers can tear through water to establish better contact with submarines.Byline: ANI London, August 26 (ANI): The US Defense Advanced Research Projects Agency Defense Advanced Research Projects Agency (DARPA), U.S. government agency administered by the Department of Defense (see Defense, United States Department of). (DARPA DARPA: see Defense Advanced Research Projects Agency. (Defense Advanced Research Projects Agency) The name given to the U.S. Advanced Research Projects Agency during the 1980s. It was later renamed back to ARPA. ) is turning to blue lasers to establish contact with submarines, as they penetrate water more effectively. The water that hides enemy submarines also makes it hard to contact the friendly ones from the air - unless they surface. According to according to prep. 1. As stated or indicated by; on the authority of: according to historians. 2. In keeping with: according to instructions. 3. a report in New Scientist, reaching submerged subs has required giant transmitters sending very low-frequency radio waves Radio waves Electromagnetic energy of the frequency range corresponding to that used in radio communications, usually 10,000 cycles per second to 300 billion cycles per second. , which limits data transmission speeds, until the development of the blue lasers. It has long been known that blue light penetrates water well. DARPA tried to develop blue laser links to subs around 1980, but failed as the lasers available were inefficient. DARPA's fresh shot utilizes new compact lasers that emit blue light, and receivers with filters which transmit that wavelength and block any background light. Fitting them in planes and ships should provide a high-bandwidth link with allied subs. (ANI) Copyright 2009 Asian News International The Asian News International (ANI) agency provides multimedia news to China and 50 bureaus in India. It covers virtually all of South Asia since its foundation and presently claims, on its official website, to be the leading South Asia-wide news agency. (ANI) - All Rights Reserved. Provided by Syndigate.info an Albawaba.com company |
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