Multi-frequency Raman amplifiers
Abstract
In its usual implementation, the Raman amplifier features only one pump carrier frequency. However, pulses with well-separated frequencies can also be Raman amplified while compressed in time. Amplification with frequency-separated pumps is shown to hold even in the highly nonlinear, pump-depletion regime, as derived through a fluid model, and demonstrated via particle-in-cell (PIC) simulations. The resulting efficiency is similar to single-frequency amplifiers, but, due to the beat-wave waveform of both the pump lasers and the amplified seed pulses, these amplifiers feature higher seed intensities with a shorter spike duration. Advantageously, these amplifiers also suffer less noise backscattering, because the total fluence is split between the different spectral components.
Cite
@article{arxiv.1802.08906,
title = {Multi-frequency Raman amplifiers},
author = {Ido Barth and Nathaniel J. Fisch},
journal= {arXiv preprint arXiv:1802.08906},
year = {2018}
}
Comments
7 pages, 6 figures, submitted to Phys. Rev. E