We demonstrate unidirectional bistability in microdisk lasers electrically pumped and heterogeneously integrated on SOI. The lasers operate in continuous wave regime at room temperature and are single mode. Integrating a passive distributed Bragg reflector (DBR) on the waveguide to which the microdisk is coupled feeds laser emission back into the laser cavity. This introduces an extra unidirect...

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An efficient location registration scheme is essential to continuously accommodate the increasing number of mobile subscribers and offer a variety multimedia services with good quality. The objective this study was analyze optimal size for area distance-based (DBR) by varying areas on cell-by-cell basis, not ring-by-ring basis. Using our proposed random walk mobility model, circumstances were a...

The optical feedback tolerance (OFT) of a distributed Bragg reflector (DBR) laser was investigated experimentally. static and modulation performance the DBR under examined by evaluating its relative intensity noise (RIN) bit error rate (BER). It is shown that OFT closely related to peak wavelength detuning wavelength. A high demonstrated, both in continuous wave (CW) direct (DM) states, when re...

A (k,g)-cage is a k-regular simple graph of girth g with minimum possible number vertices. In this paper, (k,g)-cages which are Moore graphs referred as minimal (k,g)-cages. connected called distance regular (DR) if all its vertices have the same intersection array. bipartite biregular (DBR) partite set admit It known that DR and their subdivisions DBR graphs. for we give formula spectral radiu...