Novel automatic control for the optimum optical gain and phase differences in SOA–MZI wavelength converter: Theory and experiment

Duty-Cycle Division Multiplexing: Alternative for High Speed Optical Networks

“…Therefore, automatic gain controller/limiter is not used in our setup. 11) We expect that our result is still valid even if such device is included in the setup. A Gaussian lowpass filter is used to minimize system noise, with a cut-off frequency of 0.75 of the null-to-null bandwidth (30 GHz).…”

“…1(a) is affected from phase shift; the original data can be recovered as explained in the following paragraph. However, we expect further performance improvement can be achieved by the introduction of automatic phase controller in the multiplexer, 10,11) which will cater the temperature dependent phase variation. At the receiver side, a simplest structure is used for the front-end, in which the optical signal is first detected by a pi-n photodiode (PD) and passed through a low-pass filter (LPF) followed by the demultiplexer.…”

Effect of optical filtering on the performance of 40 Gbps DCDM systems

“…However, we expect further performance improvement can be achieved by the introduction of automatic phase controller in the multiplexer [10]. Study of the phase shift produced by the optical couplers in the multiplexer system is not within the scope of this paper.…”