Characteristics Of The Composite Coherent Vortex

With the rapid development of science and technology, space laser communicationtechnology has become the most popular communications technology in the world.Semiconductor lasers can meet the requirements of the laser communication, especially in theintroduction of the laser quantum well, semiconductor laser began to widespread theapplication in the field of communications laser. We know, in the transmission of atmosphericturbulence, coherent laser beams is wider, and the space of the beam is to enhance the limit inthe application of many development ; Recent experimental studies show that, in the sameconditions of atmospheric turbulence, part in the propagation of the coherent beam than bythe influence of atmospheric turbulence small lot. Partially coherent light also has to specklethe advantages of low sensitivity, which is widely applied to the fields such as laser fusion.Partially coherent light has many merits, relevant researchers have been achieved after along-term studies of partially coherent light, in the basis and further expansion, thedevelopment of a kind of partially coherent light as the carrier of partially coherent beamvortex. This is not only a normal part of the beam of coherent beam all superior performance,but has its own characteristics. Partially coherent vortex research has drawn more and moreclose attentions of scholars in this field.In this paper，We focused on partially coherent light optical parameters of the vortex ofsuperposition of the formation of the composite coherent vortex position and light strongeffect of research, and also discussed the partially coherent light vortex in the aperture lensesfocus of the nature of the vortex formed, and on the basis HuanWei power method isdiscussed by the focal shift after focusing the characteristics. The whole paper is divided intofive chapters:Chapter 1：The introduction of partially coherent light vortex technology developmenthistory and its important applications. And it illustrated the main problems and researchresults. Chapter 2：The Introduction of related theory about the partially coherent light vortex.the mathematical model of partially coherent light and the commonly used methods of thepartially coherent beam vortex were listed .Chapter 3：According to the theory of partially coherent light transmission, this paperintroduces the partially coherent light source vortex in luminous intensity distribution of theplane, taking the ring beam and roof beam scroll wraps scroll as an example, the paperanalyses the random process in stationary, two beams of partially coherent vortex beam in thesource of synthetic coherent vortex, numerical simulation and discuss the synthetic coherentvortex vortex nuclear position and strong light with the change of beam parameters.Chapter 4：we have further researched the partially coherent light beam scroll and thetheory of partially coherent gaussian beam Bessel scroll through the lens aperture afterfocusing light intensity distribution and the expression of the dryness . the detail discussion ofcoherence length, truncation factor and the topological number of beam parameters have beenmade by focusing the each other after dry degree and light on the distribution of thestrong.and we discussed the partially coherent vortex beam through the aperture lenses focuson the characteristics of the focal shift.