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The authors present a multi-carrier transmitter based on a gain switched laser employed in a next generation access network. The simple, robust and cost efficient direct modulation based comb generation technique offers closely spaced coherent channels. Each of the channels is imposed with 2.5 Gbaud data using QPSK and 16-QAM formats. The authors also(More)
In this paper, we present the experimental investigation of the switching-on and passive mode-locking times of a Fabry-Pérot quantum dash laser diode. Their values are 30ns and 8ns respectively. These times are measured in order to study the phenomenon of mode-locking in this device and its potential application for packet switching networks.
In this paper, a detection scheme based on four wave mixing in a semiconductor optical amplifier (SOA) is used to measure the frequency and bandwidth of the optical terahertz beat-tone signal generated by a passively mode locked semiconductor laser. Two signals from external cavity lasers are injected into an SOA, which acts as a local oscillator at their(More)
Optical frequency comb sources (OFCS) have recently attracted a lot of interest due to wide ranging applications such as optical arbitrary waveform generation [1], photonic microwave signal generation [2], optical signal processing [3] and multi-carrier spectrally efficient transmission techniques with the sub-channel spacing equal to the symbol rate of(More)
Synchronization of a 40 GHz quantum-dash mode-locked Fabry-Pérot laser diode with optically injected pulse streams is experimentally studied by analyzing the linewidth of the associated 40 GHz beat-tones. Injected signals consist of trains of 1.6 ps pulses at various repetition rates, spanning from 10 to 160 Gb/s of encoded or not with pseudo-random(More)
A bulk semiconductor optical amplifier (SOA) utilizing a multi-contact biasing method is characterized as a function of the bias current supplied to each section Firstly, amplified spontaneous emission spectra and characteristic light-current profiles are analyzed. Single-pass gain and noise figure of the SOA are then assessed by injecting a continuous wave(More)
An experimental analysis of the timing jitter associated with sub-picosecond pulses produced from a quantum dash passively mode-locked Fabry-Pérot laser is produced. Moreover, application as an all-optical clock recovery function for a 40Gb/s data rates with non-return-to-zero (NRZ) modulation format is demonstrated using this laser.
Generation of sub-picosecond pulses by a dc-biased passively mode-locked Fabry-Pérot laser is demonstrated. By using a tunable band-pass filter, it is observed that the width of the generated pulses decreases in direct proportion to the optical modes emitted by the laser. Furthermore, performing a passive compression by a piece of single mode fiber,(More)