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In this letter, we propose a novel design method for distributed Bragg reflectors (DBRs) in vertical cavity surface emitting lasers (VCSELs). Different from the traditional design, the newly proposed algorithm abandons the long-term used quarter-wave theory. Instead, the reflectivity of DBR is considered as a whole and a unique phenomenon that the optimal thickness is period-number dependent has been...
The paper presents a collection of slides about network transformation that requires the evolution of multiple network layers in the same timeframe. Network usage is application driven, and there is a great deal of uncertainty in applications demand and user behavior. Operators face critical choices in network architecture and technology that can have great impact on their business goals. A unified...
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