Crosstalk Reduction by Backward Raman Pumping in Multi-Wavelength Fiber Optical Parametric Amplification

Guo, Xiaojie; Shu, Chester

doi:10.1364/cleo_si.2015.sw4l.5

Cited by 2 publications

(2 citation statements)

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“…[19] is appropriate for the modeling of multi-wavelength amplification in a Raman-assisted FOPA as it takes into account the interaction among all the waves propagating along the HNLF. Recently, we have reported reduction of FWM crosstalk for two-wavelength amplification in a Raman-assisted FOPA and explained the experimental observation through simulation based on the NLSE [21]. However, only the case of two channels was studied.…”

Section: Introductionmentioning

confidence: 99%

Investigation of Raman-Assisted Crosstalk Reduction in Multi-Wavelength Fiber Optical Parametric Amplification

Guo

Shu

2015

J. Lightwave Technol.

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Suppression of four-wave mixing (FWM) crosstalk during multi-wavelength amplification in a Raman-assisted fiber optical parametric amplifier (FOPA) is investigated theoretically and experimentally. The principle of crosstalk reduction by using a backward Raman pump is revealed by analytical expressions and verified by simulations. The crosstalk reduction is attributed to the unique power evolution of the signals caused by the monotonically increasing parametric pump power in the Raman-assisted FOPA. We obtain over 7 dB reduction in FWM crosstalk initiated from both degenerate-FWM and non-degenerate-FWM processes in the Raman-assisted FOPA, as compared to a conventional FOPA with equivalent signal gain. The experimental results show excellent agreement with the simulations. We also discuss the effects of signal channel number and the powers of the parametric pump and the Raman pump on the FWM crosstalk. The simulation results indicate that under the same level of signal gain, the amount of crosstalk reduction can be increased by using a stronger Raman pump associated with a weaker parametric pump.Index Terms-Crosstalk, fiber optical parametric amplifier, wavelength division multiplexing, Raman scattering.

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Section: Introductionmentioning

confidence: 99%

Investigation of Raman-Assisted Crosstalk Reduction in Multi-Wavelength Fiber Optical Parametric Amplification

Guo

Shu

2015

J. Lightwave Technol.

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“…The enhancement is contributed by both the direct Raman gain and the increased PI parametric gain from the Raman-amplified parametric pump. Recent investigations also reveal the capability of the Raman-assisted PI-FOPA in deferring gain saturation 14 and suppressing multi-channel crosstalk 15 16 .…”

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confidence: 99%

Raman-Enhanced Phase-Sensitive Fibre Optical Parametric Amplifier

Guo

Shu

2016

Sci Rep

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Phase-sensitive amplification is of great research interest owing to its potential in noiseless amplification. One key feature in a phase-sensitive amplifier is the gain extinction ratio defined as the ratio of the maximum to the minimum gains. It quantifies the capability of the amplifier in performing low-noise amplification for high phase-sensitive gain. Considering a phase-sensitive fibre optical parametric amplifier for linear amplification, the gain extinction ratio increases with the phase-insensitive parametric gain achieved from the same pump. In this work, we use backward Raman amplification to increase the phase-insensitive parametric gain, which in turn improves the phase-sensitive operation. Using a 955 mW Raman pump, the gain extinction ratio is increased by 9.2 dB. The improvement in the maximum phase-sensitive gain is 18.7 dB. This scheme can significantly boost the performance of phase-sensitive amplification in a spectral range where the parametric pump is not sufficiently strong but broadband Raman amplification is available.

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Crosstalk Reduction by Backward Raman Pumping in Multi-Wavelength Fiber Optical Parametric Amplification

Abstract: Reduction of four-wave-mixing crosstalk in multi-wavelength amplification is achieved using a backward Raman pump in a fiber optical parametric amplifier. The receiver sensitivity is improved by 1.6 dB in the amplification of three data channels.

Cited by 2 publications

References 5 publications

Investigation of Raman-Assisted Crosstalk Reduction in Multi-Wavelength Fiber Optical Parametric Amplification

Investigation of Raman-Assisted Crosstalk Reduction in Multi-Wavelength Fiber Optical Parametric Amplification

Raman-Enhanced Phase-Sensitive Fibre Optical Parametric Amplifier

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