Abstract-RSOA is considered a strong candidate to play an important role in realizing the next generation WDM PON, based on the wavelength reuse concept. Therefore, accurate and efficient modeling of RSOA is of significant importance.We present a time-domain wideband model for simulation of spatial and temporal distribution of photons and carriers in a bulk RSOA. A trade-off between the accuracy and the computational efficiency of the model is studied. Multi-objective genetic algorithm is utilized for parameter extraction. Experimental validation has been performed for continuous wave input, NRZ and QPSK signaling pulses up to 40 Gb/s of bit rate, in both amplification and remodulation regimes. Saturation, noise, chirp and signal broadening are successfully predicted, while reducing the computational time compared to other wideband models.Index Terms-modeling, optical communications, QPSK, reflective semiconductor optical amplifiers, remodulation. I. INTRODUCTIONEFLECTIVE semiconductor optical amplifiers (RSOA) have drawn considerable attention in recent years, especially for their feasibility in cost and complexity sensitive broadband access solutions [1,2]. In particular, wavelength division multiplexing passive optical network (WDM PON) technology increasingly relies on the colorless optical network unit (ONU) concept, often based on carrier regeneration and remodulation by means of RSOA [3][4][5]. Moreover, RSOA has been recently used in coherent scenarios, for generation of advanced phase shift keying modulation formats [6,7]. Accurate and computationally efficient modeling for the device can thus be an important asset in efforts of defining the conditions for feasibility of such scenarios.Upon its propagation through RSOA waveguide structure, a signal is subjected to dynamic effects that can be somewhat expected to be similar to those in a conventional semiconductor optical amplifier (SOA). However, fiber-to- Aveiro, ali@av.it.pt; natasa@av.it.pt; teixeira@av.it.pt).R. P. Dionísio is with the Department of Electronics and Telecommunications, Castelo Branco Polytechnic Institute, Castelo Branco, 6000-767 Portugal (e-mail: rdionisio@ipcb.pt).fiber optical gain, noise figure (NF) and saturation characteristics of RSOA can be quite different in comparison. In describing those effects one can therefore not fully rely on well described numerical models for SOA, as the effects of counter-propagation will considerably affect the longitudinal distribution of photon and carrier densities. Furthermore, pulse propagation effects ought to be systematically studied by using dynamic modeling, rather than steady-state one [8], since RSOA is no longer employed at relatively low remodulation bitrates (i.e. 1 Gb/s or less) due to novel solutions for overcoming its limited modulation bandwidth [4,5]. Experimentally verified theoretical investigation of pulse propagation dynamics in RSOA has been recently reported [9]. However, it is of interest to provide a more general modeling including the noise contribution, supported by...
125-GB/s CP-QPSK field trial over 4108 km of installed submarine cableVeljanovski Document VersionPublisher's PDF, also known as Version of Record (includes final page, issue and volume numbers)Please check the document version of this publication:• A submitted manuscript is the author's version of the article upon submission and before peer-review. There can be important differences between the submitted version and the official published version of record. People interested in the research are advised to contact the author for the final version of the publication, or visit the DOI to the publisher's website.• The final author version and the galley proof are versions of the publication after peer review.• The final published version features the final layout of the paper including the volume, issue and page numbers. Link to publication Citation for published version (APA):Veljanovski, V., Sleiffer, V. A. J. M., Borne, van den, D., Capasso, J., Kuluslu, H., Seixas, J., ... Waardt, de, H. (2011). 125-GB/s CP-QPSK field trial over 4108 km of installed submarine cable. In Proceedings of the 2011 Optical Fiber Communication Conference and Exposition (OFC/NFOEC) and the National Fiber Optic Engineers Conference, 6-10 March 2011, Los Angeles, California (pp. 1-3). Piscataway: Institute of Electrical and Electronics Engineers (IEEE). General rightsCopyright and moral rights for the publications made accessible in the public portal are retained by the authors and/or other copyright owners and it is a condition of accessing publications that users recognise and abide by the legal requirements associated with these rights.• Users may download and print one copy of any publication from the public portal for the purpose of private study or research.• You may not further distribute the material or use it for any profit-making activity or commercial gain • You may freely distribute the URL identifying the publication in the public portal ? Take down policyIf you believe that this document breaches copyright please contact us providing details, and we will remove access to the work immediately and investigate your claim. Abstract:We show the successful transmission of 125-Gb/s CP-QPSK (coherent-detected polarization-multiplexed quadrature phase shift keying) over both 2054km and 4108km of field deployed submarine cable.
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