All-optical clock recovery module based on self-pulsatingDFB laser

Abstract

An all-optical clock recovery module is developed and tested in a 100 Gbit/s 105 km transmission experiment. A penalty free function of the optical clock relative to an electronic phase-locked loop is demonstrated. The compact module is wavelength and polarisation insensitive and requires no electrical radiofrequency equipment. Continuous frequency tuning from 5 to 22 GHz indicates the potential for bit rate flexible clock recovery

Conditions for Synchronization of One Oscillation System

“…In this terminology, the phenomenon of "approximation synchronization" (3) means the following: if the difference of the optical frequencies α and α 0 is sufficiently large and the difference of the modulation frequencies β and β 0 is sufficiently small, then, on a sufficiently large time interval, the light intensity of a laser is "almost" periodic with frequency β, i.e., with the modulation frequency of the external optical signal. This phenomenon was observed in experiments (see [4]) and can possibly be used in optoelectronic networks.…”

Tuning the period of square-wave oscillations for delay-coupled optoelectronic systems

“…The generation of tunable pulsating dynamics has been studied over the past few years [6][7][8][9][10][11][12][13][14], motivated by new applications such as optical clocks [7] and other binary logical applications, generation of stable microwave signals, or optical sensing [8]. In particular, stable square waves oscillating in antiphase have been observed in the intensities emitted in each of the polarization directions in edge-emitting diode lasers (EELs) subject to crossed-polarization reinjection (XPR).…”

High capacity all-optical networks capable of supporting bandwidth on demand

“…Self-pulsations can be achieved by exploiting the Q-switching of the laser cavity. By the use of a self-pulsating three-section distributed-feedback (DFB) laser, a wavelength and polarization independent clock recovery module with a tunable frequency from 5 GHz to 22 GHz has been developed and tested in a 10 Gbit/s transmission experiment ( Sartorius, 1998).…”