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In order to raise the laser power and improve the far-field characteristics, a new method for designing the waveguide of 980nm AlGaAs/InGaAs semiconductor laser is demonstrated. Theory analysis shows the smaller the confinement factor is, the greater laser power will be. The confinement factors and near field profiles for various optical modes are simulated. The main factors influenced outpower are...
In this paper, According to measurements data from experiment of laser propagation along 0.9Km distance near ground path and 45m ground altitude, the received scintillation fluctuation data and spot size are recorded and analyzed without consider the scale of turbulence. Under the strong turbulence, the structure constant of refractive index Cn2 is computed using scintillation fluctuation and then...
With the development of the wild Internet of things , Because of the many benefits of laser communications, laser communications network as Internet of things important means of optical networks has become an inevitable trend and urgent demand. This paper designed the 150mm optical main diameter, Laser divergence angle of 1mrad multipoint communication system. Mainly using the splitter splitting and...
Modulating Retro-reflector terminal does not need capture, tracking, targeting(ATP) sub-system .The key unit of this type structure is corner- cube prism,its performance will cause the light beam intensity distribution and light beam divergence angle .There are several factors ,such as effective area , right-angle accuracy, surface-type errors .Those errors caused loss of light power result in communication...
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