Simultaneous 160-Gb/s Demultiplexing and Clock Recovery by Utilizing Microwave Harmonic Frequencies in a Traveling-Wave Electroabsorption Modulator

Abstract

Abstract-A traveling-wave electroabsorption modulator (TW-EAM) is used to realize three simultaneous functions: demultiplexing, detection, and pulse generation. These coexisting functions are achieved by utilizing microwave harmonic frequencies and independent wavelengths in the TW-EAM. When combined with a phase-locked-loop, these functions enable simultaneous optical demultiplexing, electrical clock recovery, and optical clock generation at line-rates of 40 and 160-Gb/s.

Polarization and wavelength-independent time-division demultiplexing based on copolarized-pumps FWM in an SOA

“…1(b)]. Using the lumped model for FWM in SOAs [7], we obtain an approximated expression for the output power of the new FWM signals (1) where is the input signal power, and the pump powers, the SOA gain, and the so-called relative conversion efficiency function [10].…”

“…In this frame, ultrafast OTDM systems need optical demultiplexers able to extract a tributary channel from a very high bit rate aggregate stream. To this aim, several techniques have been proposed [1]- [6], but they are generally limited by complexity or maximum operation speed. The use of semiconductor-based devices is a promising choice to implement this function because of their compactness and integrability.…”

Effective optical clock recovery and simultaneous fourfold demultiplexing of OTDM signal using an optoelectonic oscillator

“…CR has been demonstrated in quite a number of schemes in past decades, e.g., by mode-locked lasers (MLLs), self-pulsing lasers, phase-locked loops (PLLs) and optoelectronic oscillators (OEOs) [1][2][3][4]. Among various technologies, PLL and OEO based schemes draw more attention for the most outstanding feature of simultaneous operation for CR and demultiplexing of OTDM signal [5][6][7][8][9][10][11][12], which effectively release the complexity and increase the flexibility of an OTDM receiver.…”