Research On Application Of Micro-optics Elements In Light Beam Coupling In Optical Communication Devices

With the development of Internet technology, people have an increasing demand for information , which makes information industry a leading sector in the late 20th century. During which Optical fiber communication devices technology, an important part of IT , has developed at speed. Subsequently, worldwide fierce competition in this field have been conducted . This thesis, based on the design methods of optical devices and requirements of communication system, mainly analyses the inter-device coupling process , and has designed some optical devices in theory, some of which are substantiated in experiment.In general, the thesis covers the following aspects:First, In accordance with the property of variable tuning optical attenuator (VOA),which is analyzed and discovered through diffraction theory , selected block plate and made attenuator , and achieved satisfactory effect by experiment in light transportation circuit .Second, in the process of developing elements, applied diffraction-refraction mixed elements (ball-lens + micro-optics elements)to light beam coupling so as to ensure the stability of performance parameter of optical devices, and made full use of ball lens symmetry to reduce the tuning freedom of elements . Moreover , compensated for aberration of ball lens by designing phase compensating plate to get a higher energy utilization rate.Third, combining with the light beam property of DWDM system, put forward taking Fresnel lens array as fiber arrayed collimator ,designed differently structured lens array and discovered the arrayed collimator loss property, which compared with the existing parameter of fiber collimator, embodies many advantages as arrayed collimator.