EIA: The Effect of Hydrogen on Optical Damage in Ti DiffusedLiNbO3 Waveguides

EIA：氢对 Ti 扩散 LiNbO3 波导光学损伤的影响

• 批准号: 8710569
• 负责人: Dunbar Birnie
• 金额: $ 7万
• 依托单位: University of Arizona
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 1987
• 资助国家: 美国
• 起止时间: 1987-07-15 至 1989-12-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=8710569&HistoricalAwards=false
• 关键词: EIA; Effect; Hydrogen; Optical; Damage

This work is funded as an Engineering Initiation Award (EIA). The presence of hydrogen in lithium niobate crystals has been found to make Ti-diffused waveguides less susceptible to photorefractive optical damage. This project is aimed at understanding how the hydrogen additions lower damage. The work will proceed in five stages: (1) Annealing at high temperature in a controlled gas environment will be used for equilibration (oxygen, lithium, and water activities will be controlled simultaneously); (2) FTIR, Raman, and optical spectroscopies will be used to analyze the equilibrated crystals; (3) the bulk photorefractive effect will be measured by writing holographic diffraction gratings; (4) planar waveguides will be made by in-diffusion of titanium; and (5) optical damage in the waveguides will be measured. The results of each of these steps will be correlated to understand what hydrogen defects are present and what their effects are. A better understanding of hydrogen in lithium niobate will allow fabrication of waveguides with longer life and higher power transmission capabilities. This proposal describes work which will further characterize the photorefractive effect in lithium niobate. The understanding obtained in the proposed study should allow the fabrication of improved optical devices. The major thrusts of this study will be to identify hydrogen related defects which are likely to be present in lithium niobate, and to assess their positive or negative effects on the photorefractive effect. The identifications will be made by studying crystals which have been equilibrated in carefully controlled environments.

这项工作是作为工程启动奖（EIA）资助的。 已经发现，氯酸酯晶体中氢的存在使Ti-diffuse的波导不太容易受到光赋予光学损伤的影响。 该项目旨在了解氢添加如何降低损害。 这项工作将在五个阶段进行：（1）在受控气体环境中在高温下退火进行平衡（氧，锂和水活动将同时控制）； （2）FTIR，拉曼和光谱镜将用于分析平衡的晶体； （3）将通过编写全息衍射光栅来衡量散装光浪费效应； （4）平面波导将通过钛的扩散来制作； （5）将测量波导中的光损伤。 这些步骤中的每个步骤的结果都将相关，以了解存在哪些氢缺陷以及它们的影响。 更好地了解尼橙锂中的氢，将允许制造具有更长寿命和更高功率传播能力的波导。 该提案描述了将进一步表征尼贝特锂的光质效应的工作。 在拟议的研究中获得的理解应允许制造改进的光学设备。 这项研究的主要推力是鉴定可能存在于尼贝特锂中的氢相关的缺陷，并评估其对光疗法效应的阳性或负面影响。这些识别将通过研究在经过精心控制的环境中平衡的晶体来进行。