Optimization of Raman-Assisted Fiber Optical Parametric Amplifier Gain

Wang, Shao Hao; Xu, Lixin; Wai, P.K.A.; Tam, Hwa Yaw

doi:10.1109/jlt.2011.2112636

Cited by 21 publications

(10 citation statements)

References 25 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Several advantages of Raman-assisted FOPAs have previously been reported, including enhancement of gain and wavelength conversion efficiency [24,25], gain-window extension [26], reduction of cross-gain modulation crosstalk [27], and low noise figure [28]. In addition to these favorable features, the results in this work assure that Raman-assisted FOPAs are also attractive for use in high-capacity multi-wavelength communications.…”

Section: Discussionmentioning

confidence: 56%

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

Guo

Shu

2015

J. Lightwave Technol.

View full text Add to dashboard Cite

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.

show abstract

Section: Discussionmentioning

confidence: 56%

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

Guo

Shu

2015

J. Lightwave Technol.

View full text Add to dashboard Cite

show abstract

“…In paper [14], the authors have described a mathematical model and presented simulation results for the optimization of a RA-FOPA, exhibiting a bandwidth of 170 nm and low ripples. The relationship between the overall gain and different combinations of Raman and parametric pump powers have been investigated both theoretically and experimentally using a single channel signal [15].…”

Section: Introductionmentioning

confidence: 99%

Suppression of WDM four-wave mixing crosstalk in fibre optic parametric amplifier using Raman-assisted pumping

Redyuk¹,

Stephens²,

Doran³

2015

Opt. Express

View full text Add to dashboard Cite

Abstract:We perform an extensive numerical analysis of Raman-Assisted Fibre Optical Parametric Amplifiers (RA-FOPA) in the context of WDM QPSK signal amplification. A detailed comparison of the conventional FOPA and RA-FOPA is reported and the important advantages offered by the Raman pumping are clarified. We assess the impact of pump power ratios, channel count, and highly nonlinear fibre (HNLF) length on crosstalk levels at different amplifier gains. We show that for a fixed 200 m HNLF length, maximum crosstalk can be reduced by up to 7 dB when amplifying 10x58Gb/s QPSK signals at 20 dB net-gain using a Raman pump of 37 dBm and parametric pump of 28.5 dBm in comparison to a standard single-pump FOPA using 33.4 dBm pump power. It is shown that a significant reduction in four-wave mixing crosstalk is also obtained by reducing the highly nonlinear fibre interaction length. The trend is shown to be generally valid for different net-gain conditions and channel grid size. Crosstalk levels are additionally shown to strongly depend on the Raman/parametric pump power ratio, with a reduction in crosstalk seen for increased Raman pump power contribution.

show abstract

“…Raman-assisted FOPA has been proposed to extend the parametric gain window and enhance the gain [7,8]. It has also been shown that backward Raman amplification can modify the power profile of the parametric pump along the fiber, which leads to different pump depletion and gain saturation characteristics compared to a conventional FOPA with the same unsaturated gain [9].…”

Section: Introductionmentioning

confidence: 99%

Control of Saturation Characteristics in a Fiber Optical Parametric Amplifier by Raman Amplification

Guo

Shu

2014

Cleo: 2014

View full text Add to dashboard Cite

show abstract

Optimization of Raman-Assisted Fiber Optical Parametric Amplifier Gain

Cited by 21 publications

References 25 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

Suppression of WDM four-wave mixing crosstalk in fibre optic parametric amplifier using Raman-assisted pumping

Control of Saturation Characteristics in a Fiber Optical Parametric Amplifier by Raman Amplification

Contact Info

Product

Resources

About