摘要随着信息时代的飞速发展，以光纤和光波导器件为基础的光通信由于其速度快、稳定性好等优点越来越受到重视，其中单模大模场面积波导更是研究热点之一。本论文首先介绍了光波导基础理论，然后对平板波导与脊形波导的单模条件进行了理论分析，并对脊形波导单模传输时其基模的有效折射率和模场面积随着内脊高、外脊高、脊宽的变化规律进行了数值仿真，分析了三个结构参量对脊形波导单模条件的影响，并提出了脊形波导结构的优化。由于波导制作工艺的原因，脊形波导的脊形部分最后经常会形成梯形，本文也同时研究了梯形波导下脊宽对基模的有效折射率和模场面积的影响。最后，本论文简要介绍了单模大模场面积波导在激光领域的主要应用。80425

毕业论文关键词  单模  脊形波导  梯形波导

毕业设计说明书外文摘要

Title    The Design and Application Research of Large-mode-area Single-mode Waveguide       

Abstract With the rapid development of the information age, the optical communication which is based on optical fibers and optical waveguide devices has attracted more and more research attention。 Large-mode-area single-mode waveguide has become one of the most pursued research topics。 In the thesis, first, the basic theory of optical waveguides is reviewed and the single-mode condition of planar waveguides and the ridge waveguides is analyzed theoretically。 Then we simulate the effective refractive index and the mode area of the fundamental mode in the ridge waveguide for single-mode transmission when the thickness of the inner ridge and outer ridge as well as the ridge width change are varied。 The influence of these three structure parameters on the single-mode condition of ridge waveguide is also analyzed。 In addition, due to the manufacturing defects, the trapezoidal waveguide is often obtained instead of the rectangle for the ridge part。 Thus the effect of the ridge width on the fundamental mode of the effective refractive index and the mode area under the trapezoidal waveguide is also investigated。 Finally, the main applications in the laser area for the large-mode-area single-mode waveguide are briefly discussed。 

Keywords: single-mode, ridge waveguide, trapezoidal waveguide

目   次

1  绪论 1

1。1  光波导技术研究背景 1

1。2  单模大模场面积光波导 2

1。3  本论文的主要工作 3

2  光波导基础 4

2。1  光波导理论基础 4

2。2  光波导分析方法 10

2。3  光波导材料及工艺 11

3  单模大模场面积光波导的分析和仿真 16

3。1  平行平板波导分析 16

3。2  脊形波导分析 20

3。3  脊形波导的结构优化 29

3。4  梯形波导 33

4  单模大模场面积光波导的应用 35

4。1  空间模式控制 35

4。2  泵浦系统与谐振腔 37

结论 41

致谢 42

参考文献