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A novel highly birefringent photonic crystal fiber with small effective mode area is proposed. Four elliptical air-holes are designed in the internal layer of the fiber to cause the anisotropy, and the fiber has the property of highly birefringence and small effective mode area. The influences of elliptical air-holes on effective index, birefringence, effective mode area and nonlinear coefficient...
Path planning is one of hot research topics of underwater vehicle, and the real submarine path planning needs a concise and short line. This paper presents a new improved chaos particle swarm algorithm (GCPSO), where the particle swarm algorithm (PSO) is changed by using nonlinear strategy to change the inertial weights and a variable learning factor. The numerical example shows that the improved...
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