Investigation of a high-speed optical FSK scheme for WDM-PON applications with centralized lightwave source |
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Authors: | Minghao Li Xinliang Zhang Wei Li Dexiu Huang |
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Institution: | Wuhan National Laboratory for Optoelectronics, School of Optoelectronics Science and Engineering, Huazhong University of Science and Technology, Wuhan 430074, China |
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Abstract: | This paper proposes and numerically investigates a novel high-speed wavelength-division-multiplexed passive optical network (WDM-PON) architecture with colorless user terminals based on the use of orthogonal modulation scheme for downstream and upstream transmission. The 40 Gb/s optical frequency shift keyed (FSK) downstream data is generated based on carrier-suppressed modulation. At optical network unit, the downstream signal is directly re-modulated by the 2.5 Gb/s up-stream data and sent back with the same fiber. Error free transmission over 20 km single mode fiber can be observed for both downstream and upstream signals in our simulation. Power budget, tolerance of channel spacing, FSK tone spacing and dispersion are all investigated. Factors that might influence the stability of the system are analyzed and an extended hybrid wired/wireless version of the scheme is also given. |
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Keywords: | Frequency shift keying (FSK) Wavelength-division-multiplexed passive optical network (WDM-PON) Carrier suppression Delay interferometer (DI) |
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