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When considering a sampled sequence with zero values between sampling instants, one can replace it by taking every N-th value of the sequence. At these integer multiples of N, the original and sampled sequences coincide. This process, known as decimation, involves extracting every N-th sample from a sequence, thereby creating a more efficient sequence.
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Quasi-light Storage for Optical Data Packets

Quasi-light Storage for Optical Data Packets

Published on: February 6, 2014

All-optical simultaneous drop and wavelength conversion of DPSK data.

Claudio Porzi¹, Giampiero Contestabile, Antonella Bogoni

¹Scuola Superiore Sant’Anna, Via G. Moruzzi, 1, Pisa 56124, Italy.

|June 30, 2012

Summary

This study presents an all-optical method for dropping and wavelength converting differential phase-shift keyed (DPSK) data bursts. The technique utilizes a semiconductor optical amplifier Mach-Zehnder interferometer for efficient, fast data stream processing.

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Area of Science:

Photonics
Optical Communications
Nonlinear Optics

Background:

High-speed optical data processing is crucial for modern telecommunications.
Wavelength conversion and data dropping are essential functions in optical networks.
Differential phase-shift keyed (DPSK) signals offer robust data transmission.

Purpose of the Study:

To demonstrate an all-optical scheme for simultaneous data dropping and wavelength conversion.
To achieve this functionality using a single integrated device.
To validate the performance at high data rates (10 and 40 Gb/s).

Main Methods:

Utilizing a semiconductor optical amplifier Mach-Zehnder interferometer (SOA-MZI).
Employing nonlinear optical interactions between a DPSK data stream and an optical gate signal at a different wavelength.
Implementing an all-optical switching mechanism for data manipulation.

Main Results:

Simultaneous dropping and wavelength conversion of DPSK data bursts were achieved.
The scheme operates on continuous DPSK data streams at 10 Gb/s and 40 Gb/s without bit loss.
Negligible power penalties were measured at 10 Gb/s, with approximately 1.7 dB at 40 Gb/s.

Conclusions:

The demonstrated all-optical scheme provides an efficient method for DPSK data processing.
The integrated SOA-MZI approach enables high-speed wavelength conversion and data dropping.
The results show the potential for practical implementation in optical communication systems.