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Technology Stocks : Hooked on Photonics

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To: ftth who started this subject	2/11/2001 9:12:59 PM
From: ftth	of 58

Novel Fiber Used in Amplifiers Light amplifiers produced with a semiconductor-film-clad cylinder fiber developed at Syracuse University in Syracuse, N.Y., and Dove Photonics of Rome, N.Y., (see Photonics Spectra, October 1999, p. 47) threaten to challenge erbium-doped fiber amplifiers in telecommunications applications. The devices, which the researchers described in November [2000] at Photonics East in Boston, have a bandwidth 10 times as wide as erbium-doped fiber amplifiers, do not require input/output couplers and can be pumped with an LED array rather than a laser. The research team constructed the demonstration amplifier from 4-mm-long segments of fiber with a layer of Cd3P2 at the core-cladding boundary. The device displayed gain of 7.1 dB at 1550 nm, but the team expects that the use of higher-quality glass and the inclusion of a pump optimization system will produce better results. photonics.com

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