Time-Resolved Chirp Properties of SOAs Measured With an Optical Bandpass Filter

On the compensation of chirp induced from semiconductor optical amplifier on RZ data using optical delay interferometer

“…Amplified output pulse profile for tight SOA working condition in terms of the selected critical parameters, without ODI (left) and with ODI (right) of proper time delay (Δτ = 9 ps). [32,48]. Thus if the amount of chirp becomes larger then the maximum peak chirp variation across the signal coming out from the SOA will be further reduced.…”

“…Thus if the amount of chirp becomes larger then the maximum peak chirp variation across the signal coming out from the SOA will be further reduced. Among the possible ways of doing this [32,48], the increase of the SOA linewidth enhancement factor is rather effective as it affects through formula (2) directly the chirp. In fact the change of this parameter from 8 to 12, which is a typical value for SOAs under pulsed operation [49], confirms this improvement, as shown in Fig.…”

All-optical wavelength conversion of nonreturn-to-zero signals based on a nonlinear polarization switch and a delayed interferometer

“…Figure 2 shows a time-resolved chirp of the noninverted wavelength converted signal measured using an optical bandpass filter. 10 It is well known that cross-phase modulation (XPM) accompanies the NPR in the SOA. The XPM effect would impose a red-shift chirp on the leading edge and a blue-shift chirp on the trailing edge for noninverted wavelength conversion.…”

Linear self-referenced complex-field characterization of fast optical signals using photonic differentiation

“…Recent demonstrations include both linear implementations of concepts previously proved with non-linear processes (e.g. spectrography [18,19] and spectral self-interferometry [20,21]) and fundamentally new linearoptics pulse measurement schemes [22][23][24][25][26][27][28][29][30][31][32][33][34][35][36][37][38]. As compared with more conventional non-linear optics techniques, linear-optics methods offer an increased sensitivity and they can be implemented in very simple and practical (e.g.…”

“…By incorporating a balanced/differential photonic differentiation and photo-detection scheme, single-shot and real-time characterization of the instantaneous frequency and phase profiles of low-power (microwatt) continuous-time optical data streams with frequency bandwidths N10 GHz has been successfully demonstrated [36]. Whereas several self-referenced techniques have been specifically developed for instantaneous frequency characterization of telecommunication GHz-bandwidth optical signals, including methods based upon the use of photonic frequency-discriminator filters [27][28][29][30][31], they rarely offer single-shot and real-time capabilities, as desired for practical monitoring applications. Moreover, time-domain balanced PROUD can be easily extended for simultaneous full characterization of many multi-wavelength (e.g.…”