.1054 Nm, Array Design And Production Of Optical Amplifiers,

The optical signal with wavelengths of 1310nm and 1550nm is universally used in our applied optical communication systems. So, the optical amplifiers operating at these wavelengths are focused on and researched dramatically. Because of its special wavelength, the optical devices with the wavelength of 1054nm are rarely studied relatively. But due to its potential application in military item, this kind of device is researched by lots of foreign organizations. Research in this domain is relatively less in domestic. It is just beginning and is also on the low level at present.The design scheme and optical waveguide fabricated technics of optical waveguide amplifier array which can amplify the signal with wavelength of 1054nm are discussed in this dissertation. Yb³⁺-doped fiber amplifier array is also designed and fabricated successfully. The main work of this dissertation include as follows.1) The domestic and overseas development of optical waveguide devices operating near 1054nm is summarized. The optical waveguide amplifier array is designed. The pumping way and fiber-waveguide coupling method are discussed respectively.2) Fabricated technics of planar waveguide is researched in detail. Optical waveguides made by melt salt ion exchange method on Nd³⁺-doped phosphate glass are researched by lots of experiments. Failing reasons of experiments are analyzed by ion exchange theory. The technics of optical waveguide fabricated on this kind of glass is successfully obtained. The fabricated technics conditions of single mode and two to four modes are found. It is proved that this kind of Nd³⁺-doped phosphate glass can be used to fabricate waveguide. The problems in planar waveguide fabricated process are discussed in detail. Factors that influence experiment results are analyzed. Methods are presented to improve optical waveguide quality and better experiment effect is achieved.3) Fabricated technics of channel waveguide is also researched. The useful mask is designed by optical waveguide amplifier array scheme. Technics to fabricate channel waveguide is researched by lots of experiment. Special equipments are designed to improve ion exchange effect. Different ion exchange technics conditions are used to fabricate channel waveguide. The planar waveguide with single mode and three modes is fabricated on the other side of channel waveguide wafer. The problems in channel waveguide fabricated process are also introduced. Factors that influence experiment results are analyzed and methods are presented to improve channel waveguide quality.4) Yb³⁺-doped fiber amplifier array is designed and fabricated successfully. The amplifier scheme is introduced and the amplifier is made by this scheme. The length of Yb³⁺-doped fiber is optimized by experiment. The gain of the fiber amplifier is tested by different method. And then, the improved scheme is introduced. The designed target is achieved finally.In the research of optical waveguide amplifier array, the key technics difficult has been conquered, and gained a staged technical achievement. According to our latest survey, it is an unprecedented achievement to fabricate waveguide successfully by melt salt ion exchange on Nd³⁺-doped phosphate glasses. The research of both planar waveguide and channel waveguide laid a solid foundation for the success of optical waveguide amplifier array. Yb³⁺-doped fiber is used to fabricate usable fiber amplifier array. It has ability to amplifier eight 1054nm impulse signals at the same time and the gain over 30dB is obtained in single channel. The successful research can guarantee this apparatus'production and its market requirement.