Steep and adjustable transfer functions of monolithic SOA-EA 2R regenerators

Öhman, F.; Kjær, Rasmus; Christiansen, Lotte Jin; Yvind, Kresten; Mørk, Jesper

doi:10.1109/lpt.2006.873359

Cited by 13 publications

(5 citation statements)

References 13 publications

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“…The gain saturation model used in this work has proved to result in less nonlinear behavior than experiments [11]. It has also been shown that a more detailed model for the saturation of SOAs that takes into account counterpropagating ASE and includes nonzero facet reflectivities predicts a stronger nonlinearity [23]. In such a case of stronger nonlinearity, the role of higher order noise correlations is expected to be even more important.…”

Section: Numerical Examples and Discussionmentioning

confidence: 83%

Output Power PDF of a Saturated Semiconductor Optical Amplifier: Second-Order Noise Contributions by Path Integral Method

Öhman

Mørk

Tromborg

2007

IEEE J. Quantum Electron.

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Abstract-We have developed a second-order small-signal model for describing the nonlinear redistribution of noise in a saturated semiconductor optical amplifier. In this paper, the details of the model are presented. A numerical example is used to compare the model to statistical simulations. We show that the proper inclusion of second-order noise terms is required for describing the change in the skewness (third-order moment) of the noise distributions. The calculated probability density functions are described far out in the tails and can hence describe signals with very low bit error rate (BER). The work is relevant for describing the noise distribution and BER in, for example, optical regeneration.

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Section: Numerical Examples and Discussionmentioning

confidence: 83%

Output Power PDF of a Saturated Semiconductor Optical Amplifier: Second-Order Noise Contributions by Path Integral Method

Öhman

Mørk

Tromborg

2007

IEEE J. Quantum Electron.

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“…This saturation region can be used to decrease the noise at "1" level. In fact, the gain saturation of the SOA was used to suppress the noise at "1" level, as shown by Öhman et al [7] and Vivero et al [8] . We also simulate dynamic 2R operation at 10 Gbit/s.…”

Section: Simulation Resultsmentioning

confidence: 99%

“…2R regeneration can also be realized by using Four-Wave Mixing in an SOA [4] , but this scheme has a low optical signal-to-noise ratio and requires high operating optical power. In addition, an SOA and an electro-absorber are utilized for 2R regeneration [5][6][7][8] , where cross-gain compression in an SOA is used to suppress the noise at "1"-level, saturable absorption in the absorber is used to suppress the noise at "0"-level.Integration version of this concept was presented [8] . This structure has a complicated configuration and the absorber induces a considerable loss.…”

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confidence: 99%

All-optical 2R regeneration based on self-induced polarization rotation in a single semiconductor optical amplifier

et al. 2009

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Citation: Duan P X, Chen L G, Zhang S J, et al. All-optical 2R regeneration based on self-induced polarization rotation in a single semiconductor optical amplifier. An all-optical 2R regeneration based on self-induced polarization rotation in a single semiconductor optical amplifier is presented. A theoretical model is built up to simulate the system performance. Experiment evidence is also provided. An extinction ratio improvement of 8.3 dB is obtained at a bit-rate of 10 Gbit/s. In the BER measurements, 6 dB improvement of the power penalty is achieved, clearly demonstrating the feasibility of the proposed scheme. Our approach has a simple structure, and allows photonic integration.optical fiber communication, optical signal processing, optical regeneration, nonlinear polarization rotation, semiconductor optical amplifier Optical 2R regeneration (Re-amplifying and Re-shaping), which can regenerate the transmitted optical signal in all-optical domain, is attractive for the high-speed optical networks [1] . In the 2R generation technologies, semiconductor-based technologies are particularly promising because of the high nonlinear efficiency and the capability for large-scale integration [1] . Several techniques have been proposed and demonstrated. 2R regeneration was realized by using a Mach-Zehnder interferometer [2] or a Michelson interferometer [3] , respectively. The interferometric transfer function is used as a threshold decision gate. This scheme requires two semiconductor optical amplifiers (SOAs) located in two arms of the interferometer, causing a complicated structure. 2R regeneration can also be realized by using Four-Wave Mixing in an SOA [4] , but this scheme has a low optical signal-to-noise ratio and requires high operating optical power. In addition, an SOA and an electro-absorber are utilized for 2R regeneration [5][6][7][8] , where cross-gain compression in an SOA is used to suppress the noise at "1"-level, saturable absorption in the absorber is used to suppress the noise at "0"-level.Integration version of this concept was presented [8] . This structure has a complicated configuration and the absorber induces a considerable loss.In this paper, we propose a concept that can realize all-optical 2R regeneration using a single SOA. This concept is based on self-induced polarization rotation in an SOA, utilizing the birefringence effects of the SOA. We build up a numerical model to simulate the static and dynamic performance of the proposed 2R regenerator. The experimental investigation is also conducted. The simulation and experiment results are in good agreement, and show that our scheme has similar performance as an optical interferometer but with much simpler configuration. We demonstrated 6 dB improvement of the power penalty at a bit-rate of 10 Gbit/s, clearly verifying the feasibility of this technique. Our approach has a simple structure, and allows photonic integration.

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“…Therefore, monolithic integration of SOA and EAM can be used for taking both advantages, improving the function of all-optical 2R regeneration. The cascaded SOA and EAM elements have been proposed for high on-off ratio in nonlinear transfer function for 2R [5][6]. However, the intrinsic carrier dynamic of saturation behaviors in both SOA and EAM devices will inevitably cause pattern-dependent problem, limiting the usage of high-speed data transmission.…”

Section: Introductionmentioning

confidence: 99%