John - It has been known for some time that when optical fiber is bent, it leaks a little. In the OCT2002 issue of Test & Measurement World, a "live fiber detector" is discussed as a part of a test setup:
http://www.e-insite.net/tmworld/index.asp?layout=article&art icleid=CA246179 The detector company's product page is: http://www.exfo.com/en/products/gf_Product200.asp In some of the on-line literature, "leaky fiber modes" are discussed and some try to take advantage of this property to develop new products, detectors, etc. There was also some controversy a few years back over the CIA and NSA being able to "listen in" on leaky optical fiber, but one can never tell what might be disinformation. Regards, Peter L. Tarver, PE Product Safety Manager Sanmina-SCI Homologation Services San Jose, CA [email protected] > From: John Woodgate > Sent: Saturday, January 11, 2003 4:33 AM > <[email protected]> wrote: > > > >However, I think the optical cable certainly > does leak a bit at light > >wavelengths. > > That's a surprise; what evidence do you have? This message is from the IEEE EMC Society Product Safety Technical Committee emc-pstc discussion list. Visit our web site at: http://www.ewh.ieee.org/soc/emcs/pstc/ To cancel your subscription, send mail to: [email protected] with the single line: unsubscribe emc-pstc For help, send mail to the list administrators: Ron Pickard: [email protected] Dave Heald: [email protected] For policy questions, send mail to: Richard Nute: [email protected] Jim Bacher: [email protected] All emc-pstc postings are archived and searchable on the web at: http://ieeepstc.mindcruiser.com/ Click on "browse" and then "emc-pstc mailing list"
