Raman amplifier


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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.
References in periodicals archive ?
Generally Raman amplifier is expected as an effective solution with excellent noise characteristics.
To fulfill market needs, Furukawa developed the Raman amplifier (HPU42000 Series) with a built-in AGC function in March 2011 and commenced its volume production in December 2011.
The company has registered several patents on Raman amplifiers in Japan and the U.
The second paper, covering "Issues on Optimization of Multi-Pump Raman Amplifiers," will take place on Tuesday, March 8th at 2:30 p.
MRV's EM1600-OAR Raman amplifier family consists of three modules that offer 10dB, 12dB and 15dB of maximum optical gain over G652 fiber.
The Sentior 19000 product line is a rack-mountable (1RU) intelligent Raman amplifier.
com) specializes in the design, development and production of a comprehensive line of optical amplifiers, including the world only Self-Managed EDFA, the widely-deployed Dynamic (Variable-Gain) EDFA, the pioneering Gain-Switched Variable-Gain EDFA and the Class 1M laser product Raman Amplifier and various single-stage amplifiers.
Raman Amplifier to Extend Long-Span to 160 Km Between Metro Nodes
At the microscopic level, scattering of light with phonon excitations is a well-known process exploited in semiconductor devices like Raman amplifiers and acousto-optic modulators.
based OFS, Specialty Photonics Division have developed and started production of high-output, narrow-linewidth, full-band tunable lasers and integrable tunable laser assemblies (ITLAs), and have started volume production of their HPU 42000 series Raman amplifiers.
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.
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.