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#1 2006-05-12 01:51:33

cIclops
Member
Registered: 2005-06-16
Posts: 3,230

Re: Reverse propagation of light?

A very curious experimental result .. anyone understand this?

Boyd, along with Rochester graduate students George M. Gehring and Aaron Schweinsberg, and undergraduates Christopher Barsi of Manhattan College and Natalie Kostinski of the University of Michigan, sent a burst of laser light through an optical fiber that had been laced with the element erbium. As the pulse exited the laser, it was split into two. One pulse went into the erbium fiber and the second traveled along undisturbed as a reference. The peak of the pulse emerged from the other end of the fiber before the peak entered the front of the fiber, and well ahead of the peak of the reference pulse.


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#2 2006-05-12 18:44:24

John Creighton
Member
From: Nova Scotia, Canada
Registered: 2001-09-04
Posts: 2,401
Website

Re: Reverse propagation of light?

A very curious experimental result .. anyone understand this?

Boyd, along with Rochester graduate students George M. Gehring and Aaron Schweinsberg, and undergraduates Christopher Barsi of Manhattan College and Natalie Kostinski of the University of Michigan, sent a burst of laser light through an optical fiber that had been laced with the element erbium. As the pulse exited the laser, it was split into two. One pulse went into the erbium fiber and the second traveled along undisturbed as a reference. The peak of the pulse emerged from the other end of the fiber before the peak entered the front of the fiber, and well ahead of the peak of the reference pulse.

They made two pulses of light travel though the same fiber at different speeds.


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#3 2006-05-18 16:15:47

publiusr
Banned
From: Alabama
Registered: 2005-02-24
Posts: 682

Re: Reverse propagation of light?

Good for switching and time-sharing--but don't get your FTL hopes up.

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