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This letter investigates the performance of underwater optical wireless communication (UOWC) systems employing optical pre-amplification as well as multiple receivers to exploit the advantages of spatial diversity. Numerical results are further provided to evaluate the error performance of pre-amplified single-input multiple-output UOWC systems when ON–OFF keying modulation is utilized. Our results...
A fully integrated optical receiver with high sensitivity and linearity is presented. The optical receiver implements an integrated large-area photodiode, a transimpedance amplifier, an automatic gain control and linear post amplifiers to have a good linearity with multilevel pulse amplitude modulation (M-PAM). The receiver has a measured sensitivity of -22dBm (BER=10-9) at 1.25Gbit/s for a binary...
We designed and built a novel all-optical re-timing, re-amplifying, and re-shaping (3R) regeneration system based on terahertz optical asymmetric demultiplexers (TOADs) developed in our laboratory. The system is capable of parallel processing multiple wavelengths, a feature which will significantly improve the scalability of current wavelength division multiplexing (WDM) networks. Performance against...
In conventional optical data transmission schemes, electrical filters and/or optical filters are used to improve the quality of system performance. In this paper, improved design of dense wavelength division multiplexing (DWDM) optical systems is achieved by using a selective electrical filter assignment method. The methodology objective is to optimize system design and mitigate the effects of fiber...
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