鈮酸鋰調(diào)制器的光學(xué)性能研究與工藝改善
本文關(guān)鍵詞: 鈮酸鋰調(diào)制器 耦合模理論 損耗特性 工藝改善 瞬態(tài)熱分析 出處:《哈爾濱工業(yè)大學(xué)》2013年碩士論文 論文類型:學(xué)位論文
【摘要】:高速電光調(diào)制器是大容量光纖傳輸網(wǎng)絡(luò)和高速光電信息處理系統(tǒng)中的關(guān)鍵器件,由于我國對高速電光調(diào)制器的核心技術(shù)掌握得非常少,所以研究開發(fā)具有自主知識產(chǎn)權(quán)的高速電光調(diào)制器產(chǎn)品,有利于我國光電子產(chǎn)業(yè)的長遠(yuǎn)發(fā)展。 本文選取鈮酸鋰電光調(diào)制器為研究對象,在介紹國內(nèi)外發(fā)展與應(yīng)用動態(tài)的基礎(chǔ)上就鈮酸鋰高速電光調(diào)制器的性能參數(shù)進(jìn)行了研究。本論文采用有限差分束傳播法(FD-BPM)研究了調(diào)制器的各種損耗,并獲得了光波導(dǎo)的優(yōu)化參數(shù)。 本文主要對調(diào)制器三種損耗特性進(jìn)行分析:Y分支波導(dǎo)的結(jié)構(gòu)損耗、光纖-波導(dǎo)耦合損耗以及溫度影響下的調(diào)制器損耗。首先比較不同彎曲類型的Y分支結(jié)構(gòu)的損耗、分支角度以及分支間隔下的波導(dǎo)損耗并優(yōu)化Y分支結(jié)構(gòu)設(shè)計;對光纖-波導(dǎo)的耦合對準(zhǔn)損耗進(jìn)行計算,找出光纖-波導(dǎo)耦合對準(zhǔn)位置的參考控制范圍;測量調(diào)制器在不同溫度下的性能,運(yùn)用ANSYS仿真軟件對鈮酸鋰調(diào)制器的耦合結(jié)構(gòu)在受到溫度沖擊時光纖與波導(dǎo)耦合處的應(yīng)力分布和彈性位移進(jìn)行模擬,總結(jié)產(chǎn)生損耗的原因,提出用低溫玻璃焊料替代高溫紫外膠的新工藝。 通過分析三種不同類型的損耗,針對不同的損耗提出不同的解決辦法和優(yōu)化方案。根據(jù)本文總結(jié)的調(diào)制器優(yōu)化設(shè)計方案,,對調(diào)制器的工藝做相關(guān)改善,設(shè)計相關(guān)零件以滿足新工藝下的需要,最后完成調(diào)制器的封裝和性能測試。在文章的最后分析器件可靠性并提出一些建議。
[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.
【學(xué)位授予單位】:哈爾濱工業(yè)大學(xué)
【學(xué)位級別】:碩士
【學(xué)位授予年份】:2013
【分類號】:TN761
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