The capability of a highly-nonlinear fibre (HNLF) as the phase shifting element in a nonlinear optical loop mirror (NOLM) for all-optical adding=dropping optical time domain multiplexed (OTDM) channels has been demonstrated. Error-free add=drop operation of 40 Gbit=s base rate channels from a 160 Gbit=s OTDM signal has been achieved.

Conversion from 2 × 10 Gb/s NRZ WDM signals to a 20‐Gb/s OTDM signal has been experimentally verified based on four‐wave mixing (FWM) in a highly nonlinear fiber (HNLF) without the need of an extra NRZ‐to‐RZ conversion step. 10‐GHz control pulses are generated by the means of super continuum (SC) generation and are therefore synchronized with each other in time. © 2006 Wiley Periodicals, Inc. Microwave Opt Technol Lett 48: 992–994, 2006; Published online in Wiley InterScience (www.interscience.wiley.com). DOI 10.1002/mop.21544

This paper presents a theoretical and experimental assessment of the performance of a wavelength converter based on semiconductor optical amplifiers (SOA) in a MZI configuration for optical label swapping. The optical labeling of the signal is based on an FSK/IM combined modulation format for the header/payload, respectively. Experimental results are presented for a signaling scheme with payload data at 10 Gbit/s and an FSK label at 312 Mbit/s. Simulation results and measurements of the chirp properties of converted signals operating at data rates of 2.5 and 10 Gbit/s are presented. Conclusions and design guidelines are presented regarding the implications of the wavelength converter performance on the quality of the label and payload signals for fast packet/burst forwarding in optically labeled switched networks.

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