Noise Suppression Phenomenon in Fiber Raman Amplifier

Felinskyi, G. S.

doi:10.1515/msr-2015-0016

Cited by 1 publication

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“…As the pump power increases, the exponential growth in the amplified noise as compared with a non-coherent Stokes noise background independent of the pumping is observed [30]. By the careful analysis of a deformation of the noise spectra under the pumping influence, we were able to separate the coherent amplified Raman noise from the background of the spontaneous Stokes noise, which is discussed in [31], [32] in more details.…”

Section: Results Of Simulation Of a Raman Gain Profile And Their Applmentioning

confidence: 93%

Spectroscopic Features of Raman Gain Profiles in Single-Mode Fibers Based on Silica Glass

Serdeha¹,

Grygoruk²,

Felinskyi³

2018

Ukr. J. Phys.

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The spectroscopic analysis of the frequency distribution of the amplification of optical radiation due to the Raman effect (Raman gain profile) in single-mode fibers based on silica glass has been carried out in the region of Stokes frequency shifts from 0 to 1400 cm −1 . The Raman gain profiles are determined from the experimental spectra of spontaneous scattering for widespread fibers, namely for pure SiO2, GeO2, P2O5, and TiO2 doped fibers. The analytic expressions of the Raman gain profiles are given. They are obtained, by using the Gaussian decomposition by means of 11-12 modes, and the experimental profile is approximated with an accuracy of not less than 0.3%. The decomposition results are analyzed in terms of the fundamental oscillatory dynamics of molecular nanocomplexes in amorphous glass, as well as in the application aspect of the modeling of photonics devices. Examples of the proposed method applications are presented for the analysis of noise parameters of the fiber Raman amplifiers and for the generation bandwidth in fiber Raman lasers. K e y w o r d s: optical amplification, Raman gain, fiber Raman lasers, fiber Raman amplifiers.

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Section: Results Of Simulation Of a Raman Gain Profile And Their Applmentioning

confidence: 93%