Energy Transfer To The Fiber Simulation Study

The energy optoelectronics,a technology which utilize the photons as energy carrier was appeared after the invention of the first laser.As the continued development of the energy optoelectronics and the emergence of the novel high power lasers,the equipments with the power delivery fibers are widely used in many field.The silica fiber has pure silica core with higher refractive index and has the organic or inorganic compound clad with lower refractive index.For the silica fiber has a wide operating wavelength ranges,it will be used for power delivery from UV to IR.And the silica fiber has the advantages of high NA,large core size,super mechanical properties,low bend loss and high coupling efficiency.So the silica fiber has the superiority in the high power delivery system than other materials.For the especial application of the large energy laser transmittion system,this thesis designs and simulates the transmitting energy fiber.First of all,the thesis simulates and analyzes the coupling efficiency,the transmission efficiency and the energy distribution between fibers for high power laser Beam.Simulation Analysis for the influence of different lens focal length and adjustment error to the coupling efficiency , the transmission efficiency and the energy distribution with the single lens coupling method.Secondly, by model fiber macro-bending building,we simulate and analyze the relation between bend loss and core size and bend radius and numerical aperture.Thirdly,there are different ends of fibers including tapered surface and inclined surface and we simulate these surfaces by the ZEMAX software.Finally,to the especial application of large energy laser transmittion system, we develop a optical switch and simulate a special quartz optical fiber bundle for transmitting energy fiber systems.The transmitting energy fiber has the advantages of lower transmission loss,convenient operation and the flexibility of laser processing,and is widely implemented in industry, national defence, scientific research,medicinal area, such as material processing,laser medical treatment,laser ignition,etc.Study and Simulation of transmitting energy fiber has a practical significance.