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Spectral signature of nonlinear effects in semiconductor optical amplifiers

Marculescu, Andrej; Duill, Sean O.; Koos, Christian; Freude, Wolfgang; Leuthold, Jürg

Abstract:
Optical spectra of signals at the output of semiconductor optical amplifiers (SOA) provide useful insight into amplifier nonlinearities. In this work, we determine the parameters of an analytical SOA model with a pump-probe experiment by evaluating the measured spectra of the pump and probe pulses at the SOA output. The analytical lumped SOA model considers carrier depletion, carrier recovery, spectral hole burning, two-photon absorption, and we include an additional effect termed ‘two-photon induced free-carrier absorption’, that is responsible for creating an identifiable blue-shifted component in the spectra. We are able to relate the underlying physical nonlinear effects to the spectral peculiarities of the output pump and probe spectra, and give guidelines for the exploitation of these nonlinear effects for optical signal processing. In addition, with a much-simplified SOA model and by replacing the pump pulse with modulated data we show that the output spectrum is altered in a manner consistent with phase patterning effects.

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Verlagsausgabe §
DOI: 10.5445/IR/1000077381
Veröffentlicht am 16.11.2018
Seitenaufrufe: 11
seit 04.05.2018
Downloads: 15
seit 21.11.2018
Zugehörige Institution(en) am KIT Institut für Photonik und Quantenelektronik (IPQ)
Publikationstyp Zeitschriftenaufsatz
Jahr 2017
Sprache Englisch
Identifikator ISSN: 1094-4087
urn:nbn:de:swb:90-773817
KITopen-ID: 1000077381
Erschienen in Optics express
Band 25
Heft 24
Seiten 29526-29559
Nachgewiesen in Scopus
Web of Science
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