OTDM-based optical communications networks at 160 Gbit/s and beyond

Bogoni, Antonella; Potì, L.; Ghelfi, Paolo; Scaffardi, M.; Porzi, Claudio; Ponzini, F.; Meloni, G.; Berrettini, G.; Malacarne, Antonio; Prati, G.

doi:10.1016/j.yofte.2006.08.001

Cited by 47 publications

(31 citation statements)

References 47 publications

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“…The gain is calculated by solving the coupled Eqs. (1)-(4) in a stepwise manner for pulses of input data that belong to a 160 Gbit/s return-to-zero (RZ) pseudo-random binary sequence of word length 2 7 − 1 [43][44][45], and have a Gaussian power profile,…”

Section: Operation Principles Of An All-optical Simultaneous Half Addmentioning

confidence: 99%

Simultaneous all-optical basic arithmetic operations using QD-SOA-assisted Mach–Zehnder interferometer

Gayen¹,

Chattopadhyay²

2016

J Comput Electron

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All-optical logic and arithmetic operations are expected to play an important role in high-speed communication systems. In this paper, we have presented a model to perform two basic arithmetic operations (addition/subtraction) on two binary digits based on a quantum dot semiconductor optical amplifier (QD-SOA)-assisted MachZehnder interferometer. Using two QD-SOA-based switches, we have designed a half adder/subtractor circuit. The main advantage of this circuit is that simultaneous addition and subtraction operations are realized at the outputs. This circuit is designed theoretically and verified through numerical simulations. The theoretical study is carried out by taking into account the effect of amplified spontaneous emission. The dependence of the peak data power and that of the QD-SOA current density and length on the ER and Q factor of the switching outcome are explored and assessed by means of numerical simulations. The desirable device parameters has been examined in order to obtain the optimum best performance.Keywords Quantum dot semiconductor optical amplifier · Mach-Zehnder interferometer · All-optical signal processing · All-optical arithmetic operation B Tanay Chattopadhyay

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Section: Operation Principles Of An All-optical Simultaneous Half Addmentioning

confidence: 99%

Simultaneous all-optical basic arithmetic operations using QD-SOA-assisted Mach–Zehnder interferometer

Gayen¹,

Chattopadhyay²

2016

J Comput Electron

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“…Then the QD-SOA dynamical behavior should be described by properly modifying the system of 3-level rate equations [63] while discriminating the modal gains of signals A and B by assuming a Gaussian-like distribution for their spectral profiles [62]. Nevertheless, although this possibility of XGM in QD-SOAs would be beneficial for multi-wavelength applications [45], yet the switching scheme we have proposed aims at realizing ultrafast Boolean logic operation on single channel data rates and hence at supporting alloptical signal processing in the context of Optical Time Division Multiplexing (OTDM) [69].…”

Section: Stand-alone Qd-soamentioning

confidence: 99%

On the Feasibility of 320 Gb/S All-Optical and Gate Using Quantum-Dot Semiconductor Optical Amplifier-Based Mach-Zehnder Interferometer

Dimitriadou¹,

Zoiros²

2013

PIER B

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Abstract-The feasibility of realizing an all-optical AND gate for 320 Gb/s return-to-zero data by incorporating quantum-dot semiconductor optical amplifiers (QD-SOAs) in a Mach-Zehnder interferometer (MZI) is theoretically investigated and demonstrated. The proposed scheme employs the QD-SOA-based MZI in a configuration where the QD-SOA in one MZI arm is subject to the first data sequence, the QD-SOA in the other MZI arm receives no such input but is constantly held in the small signal gain regime, and the second data stream is inserted from the common MZI port acting as enabling or disabling signal. Compared to other approaches adopted for the same purpose this implementation is more general, direct, flexible and affordable as only one strong data signal is required to control switching. By conducting numerical simulation the impact of the critical parameters on the Q-factor is thoroughly assessed. The obtained results are interpreted with the help of a complete characterization of the QD-SOA response to an ultrafast data pulse stream. This allows to specify the requirements that the critical parameters must satisfy to achieve acceptable performance. The extracted design rules are technologically realistic and ensure AND operation both with logical correctness and high quality. The outcome of the numerical treatment extends the range of Boolean functions executed with the QD-SOA-MZI module at sub-Tb/s data rates.

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“…For RZ pulses, this requires lowering their power well below the SOA strong saturation regime, as well as substantially shortening their width [15]. These actions are not sufficient since the first one results in a poor optical signal-to-noise ratio (OSNR), reduced maximum output power, closer amplifier spacings and narrower input power dynamic range (IPDR) [16], while the second one requires applying intricate ultrafast pulse generation approaches [17] and dealing with practical related issues, such as nonlinear effects [18] and intraband phenomena [19].…”

Section: Introductionmentioning

confidence: 99%

Comparison of Basic Notch Filters for Semiconductor Optical Amplifier Pattern Effect Mitigation

2017

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Abstract:We conduct a thorough comparison of two basic notch filters employed to mitigate the pattern effect that manifests when semiconductor optical amplifiers (SOAs) serve linear amplification purposes. The filters are implemented using as the building architecture the optical delay interferometer (ODI) and the microring resonator (MRR). We formulate and follow a rational procedure, which involves identifying and applying the appropriate conditions for the filters' spectral response slope related to the SOA pattern effect suppression mechanism. We thus extract the values of the free spectral range and detuning of each filter, which allow one to equivocally realize the pursued comparison. We define suitable performance metrics and obtain simulation results for each filter. The quantitative comparison reveals that most employed metrics are better with the MRR than with the ODI. Although the difference in performance is small, it is sufficient to justify considering also using the MRR for the intended purpose. Finally, we concisely discuss practical implementation issues of these notch filters and further make a qualitative comparison between them in terms of their inherent advantages and disadvantages. This discussion reveals that each scheme has distinct features that render it appropriate for supporting SOA direct signal amplification applications with a suppressed pattern effect.

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OTDM-based optical communications networks at 160 Gbit/s and beyond

Cited by 47 publications

References 47 publications

Simultaneous all-optical basic arithmetic operations using QD-SOA-assisted Mach–Zehnder interferometer

Simultaneous all-optical basic arithmetic operations using QD-SOA-assisted Mach–Zehnder interferometer

On the Feasibility of 320 Gb/S All-Optical and Gate Using Quantum-Dot Semiconductor Optical Amplifier-Based Mach-Zehnder Interferometer

Comparison of Basic Notch Filters for Semiconductor Optical Amplifier Pattern Effect Mitigation

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