Optics Express · 2010 · 38 citations · 9 references
EngineeringCommunicationElectrical EngineeringOpticsOptoelectronicsPhotonicsFiber OpticsFiber-optic CommunicationModulationOptical AmplifiersOptical Communication SystemsOptical ModulationCoherent Optical CommunicationConstellation DesignOptical ReceiversOptical Transmission SystemsPhase ModulationReceiver SensitivitySemiconductor Optical AmplifiersWavelength-division Multiplexing
We generate the phase-modulated signal by utilizing the chirp characteristics of the directly-modulated reflective semiconductor optical amplifier (RSOA) for the cost-effective realization of a long-reach wavelength-division-multiplexed passive optical network (WDM PON). We first investigate the relation between the amplitude and phase modulation indices in a directly-modulated RSOA and optimize these modulation indices to maximize the symbol distance on the constellation diagram. The results show that, by operating the RSOA under this optimum condition, we can achieve the excellent receiver sensitivity of -49.8 dBm at 1.25 Gb/s. We implement a long-reach WDM PON by using the phase-modulated RSOAs and self-homodyne receivers, and demonstrate the error-free transmission of 1.25-Gb/s signal over a 110-km long link without using any optical amplifiers.
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Phase diversity techniques for coherent optical receivers
Arthur Davis, M.J. Pettitt, Jonathan P. King et al. · Journal of Lightwave Technology · 1987 · 131 citations
Single-port laser-amplifier modulators for local access
M.D. Feuer, J. M. Wiesenfeld, J.S. Perino et al. · IEEE Photonics Technology Letters · 1996 · 87 citations