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 ?
Typically, discrete lumped Raman amplifiers use separate highly nonlinear fibres as the gain medium, rather than the transmission fibre, to ensure adequate Raman scattering.
This new design of optimum gain flattening performance of Raman amplifier will be useful for telecommunication networks.
Moreover, we propose IWDM to increase the number of FBG sensors and we employ a Raman amplifier to increase the sensing signal transmission distance and to improve the signal quality.
"Broadband high-gain dispersion compensating raman amplifier," IEEE J.
The pumping required by Raman amplifiers is that of counter-propagation, which is preferred in the design and implementation of distributed Raman amplifier systems (Agrawal, 2002), due to the lower pumping-induced noise coupling on the signal, as well as a less dependence of the gain with the polarization in comparison with the schemes of co-propagation (Neves, Freitas, Almeida, & Calmon, 2003).
A silica fiber Raman amplifier pumped at a wavelength of 1451.2 nm with pump power 1000 (mW) is designed.
In this paper, we have analyzed the theory and simulated a DWDM network system using a distributed Raman amplifier pumped in two different directions.
The laboratory test was performed on a 100G/s channel over an ultra low loss optical fiber by using Huawei Marines self-developed enhanced Raman amplifier (ERPC) and remote optical pumping amplifier (ROPA).
Jiang "Robust, compact, and flexible heural model for a fiber Raman Amplifier", J.
The most promising alternative to EDFAs are the two types of optical amplifiers that utilize fiber non-linearity for all optical signal amplification purposes: Raman amplifiers (RA) and fiber optical parametric amplifiers (FOPA).
With todays customers looking for high-capacity connectivity, we see the combination of Xteras high-performing Raman amplifiers and our advanced transport solutions as a strong fit, states Christoph Glingener, CTO/COO, ADVA.