铌酸锂调制器的光学性能研究与工艺改善

发布时间：2018-03-02 04:28

本文关键词： 铌酸锂调制器耦合模理论损耗特性工艺改善瞬态热分析　出处：《哈尔滨工业大学》2013年硕士论文　论文类型：学位论文

【摘要】：高速电光调制器是大容量光纤传输网络和高速光电信息处理系统中的关键器件，由于我国对高速电光调制器的核心技术掌握得非常少，所以研究开发具有自主知识产权的高速电光调制器产品，有利于我国光电子产业的长远发展。本文选取铌酸锂电光调制器为研究对象，在介绍国内外发展与应用动态的基础上就铌酸锂高速电光调制器的性能参数进行了研究。本论文采用有限差分束传播法(FD-BPM)研究了调制器的各种损耗，并获得了光波导的优化参数。本文主要对调制器三种损耗特性进行分析：Y分支波导的结构损耗、光纤-波导耦合损耗以及温度影响下的调制器损耗。首先比较不同弯曲类型的Y分支结构的损耗、分支角度以及分支间隔下的波导损耗并优化Y分支结构设计；对光纤-波导的耦合对准损耗进行计算，找出光纤-波导耦合对准位置的参考控制范围；测量调制器在不同温度下的性能，运用ANSYS仿真软件对铌酸锂调制器的耦合结构在受到温度冲击时光纤与波导耦合处的应力分布和弹性位移进行模拟，总结产生损耗的原因，提出用低温玻璃焊料替代高温紫外胶的新工艺。通过分析三种不同类型的损耗，针对不同的损耗提出不同的解决办法和优化方案。根据本文总结的调制器优化设计方案，，对调制器的工艺做相关改善，设计相关零件以满足新工艺下的需要，最后完成调制器的封装和性能测试。在文章的最后分析器件可靠性并提出一些建议。
[Abstract]:High-speed electro-optic modulator is the key device in the high-capacity optical fiber transmission network and high-speed optoelectronic information processing system, because the core technology of high-speed electro-optic modulator is very little in our country. Therefore, the research and development of high-speed electro-optic modulator with independent intellectual property rights is beneficial to the long-term development of China's optoelectronics industry. In this paper, lithium niobate electro-optic modulator is chosen as the research object. The performance parameters of high speed lithium niobate electro-optic modulator are studied on the basis of the development and application at home and abroad. In this paper, the various losses of the modulator are studied by using the finite difference beam propagation method (FD-BPMM). The optimized parameters of the optical waveguide are obtained. In this paper, three kinds of loss characteristics of modulator are analyzed, such as structural loss, fiber-waveguide coupling loss and modulator loss under the influence of temperature. The design of Y-branch structure is optimized, the coupling alignment loss of fiber-waveguide is calculated, and the reference control range of fiber-waveguide coupling alignment position is found out. To measure the performance of modulator at different temperatures, the stress distribution and elastic displacement of coupling structure of lithium niobate modulator under temperature shock are simulated by using ANSYS software, and the causes of loss are summarized. A new process of replacing high temperature UV adhesive with low temperature glass solder is proposed. By analyzing three different types of loss, different solutions and optimization schemes are put forward for different losses. According to the optimized design scheme of modulator summarized in this paper, the process of modulator is improved. The related parts are designed to meet the needs of the new process, and the modulator packaging and performance testing are completed. Finally, the reliability of the device is analyzed and some suggestions are made.
【学位授予单位】：哈尔滨工业大学
【学位级别】：硕士
【学位授予年份】：2013
【分类号】：TN761

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