Analytical investigation of possibility of a phase sensitive amplifier based on four wave mixing in a semiconductor optical amplifier
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We numerically investigated the possibility of a phase sensitive amplifier based on a semiconductor optical amplifier. Suppression of phase variation was confirmed in the dual-pump degenerate four wave mixing method.Keywords:
Four-wave mixing
We report an extensive experimental characterization of four wave mixing (FWM) in InAs/InGaAsP/InP columnar quantum dot semiconductor optical amplifiers (QD-SOAs). This paper includes a characterization of the QD-SOA and of the single and double pump FWM performance. The double pump case is studied in both the orthogonal and parallel pumps configurations. Unprecedented ultrabroadband and efficient wavelength conversion are found including, for the two pumps case, 100-nm conversion span in the telecom bands around 1550 nm (S/C/L bands) with positive conversion efficiency and more than 30-dB output optical signal-to-noise ratio.
Four-wave mixing
Optical Pumping
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The Four Wave-Mixing (FWM) effect in a bulk Semiconductor Optical Amplifier (SOA) is widely used in all-optical communication networks for many applications such as wavelength conversion and fast optical switching. To best achieve such optical functions and bring them into practical stage, we present in this paper some performance criteria dealing with FWM phenomenon in both peaked and broad bandwidth gain SOA. The SOA with a large gain profile has given better performance by increasing the conversion efficiency and signal to background Ratio.
Four-wave mixing
Semiconductor optical gain
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We have analyzed the four-wave mixing (FWM) characteristics among short optical pulses in semiconductor optical amplifiers (SOAs) with optimum time-delays. An excellent agreement is observed between the simulated and experimental results of FWM in SOAs.
Four-wave mixing
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Summary form only given. Four-wave mixing in optical fibers is an important nonlinear process which has a profound effect on optical communications. The mixing may cause some cross-talk problems in a wavelength-division-multiplexing system. On the other hand, the mixing process is useful for frequency conversion. In this paper, we calculate the frequency conversion efficiency and discuss some related issues.< >
Four-wave mixing
Frequency Conversion
Frequency mixing
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We propose a general formulation to derive the set of equations of a multiple four-wave mixing process involving any number N of waves, equally spaced in frequency. We compare the model with experimental results for N=6 and find excellent agreement.
Four-wave mixing
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Kerr-effect based Nonlinear Optical Mixing is reviewed. The superiority of Four Wave Mixing over SPM and XPM in high speed data transmission is discussed. The applications of nonlinear mixing and use of Four Wave Mixing in optical signal processing in recent past is reviewed in the paper.
Four-wave mixing
SIGNAL (programming language)
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Semiconductor optical amplifiers (SOAs) are now good candidates for applications in all-optical signal processing. The travelling waves effects observed in long SOAs can be used to increase the performance in applications based on cross-gain modulation and four-wave mixing (FWM). We show and explain here the nearly degenerate FWM behavior of 1 and 1.5 mm long 1.55 μm bulk SOAs which is dominated by a strong effective index modulation.
Four-wave mixing
Modulation (music)
SIGNAL (programming language)
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The properties of an all-optical 2R regenerator based on four-wave mixing (FWM) in a semiconductor optical amplifier (SOA) are investigated. The regeneration is based on the nonlinear FWM transfer function and a study of the system's static behavior reveals the operating conditions, under which the transfer function approaches most the ideal, step-like discrimination characteristic function. A fiber Bragg grating (FBG) is employed in order to overcome the SOAs speed limitations due to limited carrier dynamics. The simulations with dynamic input data by means of extinction ratio (ER) and Q-factor calculations, showed satisfactory regenerative behavior up to 40 Gb/s.
Four-wave mixing
Extinction ratio
Fiber Bragg Grating
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Fibre optical parametric amplifier incorporating a Raman-pump for reduced four-wave mixing crosstalk
The Fibre Optical Parametric Amplifier (FOPA) employing highly nonlinear fibre (HNLF) has recently been highlighted as a potential technology to expand the transmission capacity of future optical communication systems. Gain bandwidths as high as 200nm [1] have been demonstrated using FOPAs, far exceeding that of the erbium-doped fibre amplifier (EDFA) at ~35nm. One limitation of the FOPA is the generation of undesired four-wave mixing (FWM) products arising from phase-matched nonlinear interactions between different combinations of input signal and FOPA-pump photons [2]. These mixing products can be spectrally co-located with the amplified signals and thus act as crosstalk, decreasing the effective optical signal to noise ratio (OSNR) and hence performance. In this paper, we experimentally demonstrate that by additionally incorporating a counter-propagating pump to provide Raman gain to the FOPA-pump within the same length of HNLF, the FWM crosstalk can be reduced in magnitude by up to 6dB compared with a standard FOPA after amplification of ten 100GHz-spaced signals and 20dB net gain. For larger numbers of channels, we envisage this improvement to be even more significant.
Four-wave mixing
Raman amplification
Optical parametric amplifier
Erbium
Amplified spontaneous emission
Crosstalk
Optical Pumping
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Andreev et al. 1 have shown that Brillouin-enhanced four-wave mixing can be used to achieve phase conjugation with high reflectivities (~10 6 ). In this paper we develop a theoretical model which effectively describes the four-wave mixing process and compare the results of this model with the experimental results we have obtained.
Phase conjugation
Brillouin zone
Four-wave mixing
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