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Coherent optical receivers have been widely used in free-space optical communication. We report on a coherent receiver with a homodyne optical phase-locked loop using a Costas loop. Differing from the conventional configuration, the demonstration in this paper with enhanced dynamic performance using an auxiliary acquisition and locking circuitry is able to achieve fast phase locking to signal laser...
This paper proposes a novel multi-wavelength time division multiplexing passive optical network (TDM-PON) configuration using a single tunable optical filter (TOF) for both downstream wavelength selection and upstream wavelength generation. The network architecture is completely compatible with the existing optical distribution network and can also mitigate Rayleigh backscattering and back reflection...
We propose a hybrid time-division multiplexing/wavelength-division multiplexing passive optical network (TDM/WDM-PON) architecture compatible with the traditional TDM-PON configuration using a power splitter in the remote node. A tunable optical filter (TOF) is used to select the downstream wavelength in each optical network unit. Meanwhile, the TOF plays a second role of seeding a reflective semiconductor...
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