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Raman amplifier

   Also found in: Wikipedia 0.03 sec.
Raman amplifier
Pronounced "ruh-mahn," it is a device that boosts the signal in an optical fiber by transferring energy from a powerful pump beam to a weaker signal beam. It relies on the interaction between light and atoms in the fiber. Unlike erbium-doped fiber amplifiers (EDFAs), which boost wavelengths in the 1530-1610 nm range, a Raman amplifier can increase the signal strength of any wavelength by pumping at 13THz more than the desired frequency.

Normally, Raman amplification is distributed along lengths of signal-transmitting fiber. A Raman pump laser is typically stationed at the end of a fiber run and pumps backward several kilometers to amplify signals through that region. See EDFA.
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To boost the reach of GPON, Lee and his team use a device called a Raman amplifier.
Laser offers cheap way to disperse high-speed Internet to rural areas by Asian News International
Fiber Raman amplifiers are becoming increasingly important in optical fiber communication systems since they provide both lower noise performance and a wider wavelength coverage than conventional optical amplifiers.
NIST researchers measure wavelength-dependent gain of raman fiber ... by Journal of Research of the National Institute of Standards and Technology
When coupled with other leading-edge Bell Labs technologies - such as extended L-band amplifiers, Raman amplifiers, forward error correction and optimal dispersion compensation - DPSK allowed the research team to achieve error-free transmission over 4,000 kilometers (2500 miles) for all 64 channels, each of which had a signal of 40 gigabits per second.
LUCENT TECHNOLOGIES UNVEILS TMX 880 MPLS CORE SWITCH by EDP Weekly's IT Monitor
 
 
 
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