DocumentCode :
1399782
Title :
SOA-MZI-Based Nonlinear Optical Signal Processing: A Frequency Domain Transfer Function for Wavelength Conversion, Clock Recovery, and Packet Envelope Detection
Author :
Spyropoulou, Maria ; Pleros, Nikos ; Miliou, Amalia
Author_Institution :
Dept. of Informatic, Aristotle Univ. of Thessaloniki, Thessaloniki, Greece
Volume :
47
Issue :
1
fYear :
2011
Firstpage :
40
Lastpage :
49
Abstract :
We present analytic expressions for the frequency-domain transfer function of semiconductor optical amplifier Mach-Zehnder interferometric (SOA-MZI) switches that employ a single optical control signal and a continuous wave input optical beam. Our analysis relies on first-order perturbation theory approximations applied both to the SOA response as well as to the SOA-MZI characteristics, yielding a frequency response that enables a qualitative insight into the different SOA-MZI operational regimes. The final transfer function expression is utilized for the analysis and evaluation of the multifunctional potential of SOA-MZI switches, concluding with the necessary conditions for supporting a number of completely different SOA-MZI-based nonlinear signal processing applications that have been demonstrated experimentally: wavelength conversion, packet envelope detection (PED), and clock recovery (CR). The theoretically obtained operational conditions are in close agreement with experimental observations, showing that SOA-MZIs can serve as functional circuit elements in applications with different requirements depending on its operational parameters: as low-pass filtering devices with cut-off frequencies in the megahertz regime or in the multi-gigahertz regime, and as resonant modules resembling band-pass filtering structures. The validity of our theoretical SOA-MZI frequency-domain system model is further confirmed by its successful incorporation in a Fabry-Perot assisted SOA-MZI subsystem, demonstrating PED and CR operations through the exploitation of typical systems theory tools.
Keywords :
Mach-Zehnder interferometers; band-pass filters; frequency response; low-pass filters; optical control; optical filters; optical information processing; optical switches; optical transfer function; optical wavelength conversion; perturbation theory; semiconductor optical amplifiers; synchronisation; Fabry-Perot assisted subsystem; Mach-Zehnder interferometric switches; SOA-MZI-based nonlinear optical signal processing; band-pass filtering; clock recovery; first-order perturbation theory; frequency domain transfer function; frequency response; frequency-domain system model; functional circuit elements; low-pass filtering devices; multifunctional potential; multigigahertz region; optical beam; optical control signal; packet envelope detection; resonant modules; semiconductor optical amplifier; system theory tools; wavelength conversion; Clocks; Frequency domain analysis; Optical interferometry; Optical signal processing; Optical switches; Optical wavelength conversion; Transfer functions; Clock recovery; Mach–Zehnder interferometer; frequency-domain analysis; optical signal processing; optical switching; packet envelope detection; semiconductor optical amplifier; wavelength conversion;
fLanguage :
English
Journal_Title :
Quantum Electronics, IEEE Journal of
Publisher :
ieee
ISSN :
0018-9197
Type :
jour
DOI :
10.1109/JQE.2010.2071411
Filename :
5662829
Link To Document :
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