Analysis of bit rate dependence up to 80 Gbit/s of a simple wavelength converter based on XPM in a SOA and a shifted filtering
Girault, Gwenaelle, Clarke, Aisling M., Reid, Douglas A., Guignard, Celine, Bramerie, Laurent, Anandarajah, Prince M.ORCID: 0000-0001-7335-8044, Barry, Liam P.ORCID: 0000-0001-8366-4790, Simon, Jean Claude and Harvey, John D.
(2008)
Analysis of bit rate dependence up to 80 Gbit/s of a simple wavelength converter based on XPM in a SOA and a shifted filtering.
Optics Communications, 281
(23).
pp. 5731-5738.
ISSN 0030-4018
This paper provides the analysis of wavelength converted pulses obtained with a simple semiconductor
optical amplifier (SOA)-based wavelength conversion scheme, which exploits cross phase modulation
(XPM) in an SOA in conjunction with shifted filtering. The analysis includes experimental measurements
of the back-to-back system performances as well as frequency-resolved optical gating (FROG) characterisations
of the wavelength converted pulses. These measurements are implemented at different bit rates
up to 80 Gbit/s and for both red and blue-shifted filtering, particularly showing different patterning effect
dependencies of red and blue-shifting techniques. This analysis is developed by the addition of a numerical
study which corroborates the experimental results. A further understanding of the different performances
of red and blue filtering techniques, presented in the literature, can thus be proposed. The
placement of the filter to undertake red-shifted filtering (RSF) allows us to achieve very short pulse
widths but high bit rate operation is limited by pattern effects. The blue-shifted filtering (BSF) technique
shows optimum performance as regards to patterning effects even if the wavelength converted pulses
can be larger.