搜索结果: 1-15 共查到“光学工程 LiNbO3”相关记录21条 . 查询时间(0.149 秒)
用严格耦合波分析法测试周期极化LiNbO3晶体畴结构
光栅 严格耦合波分析法 衍射 周期性极化的铌酸锂晶体 优化 化学腐蚀
2016/11/22
为了无损表征周期性极化晶体的畴结构,用严格耦合波分析法分析了周期性极化铌酸锂晶体的周期和占空比.以波长为532nm,功率为20mW的连续激光器为光源,TE偏振光垂直入射周期性极化的铌酸锂晶体表面,同时对晶体施加电压以改变其正负畴间的折射率差,通过光电探测器检测各衍射级的衍射效率.使用最小二乘法将光电探测器记录的实验数据与严格耦合波分析模拟的结果进行优化拟合,反演出晶体的周期和占空比.测试结果表明,...
为了克服现有电光器件的缺陷,选取晶体生长工艺成熟、价格低廉、折射率及电光系数较大的LiNbO3作为电光晶体材料,研究了沿其光轴方向通光的横向电光效应。加工制作了x切、(xzl)45°切和y切3种不同切型的横向电光调制器,并对他们的调制性能做了实验分析。研究结果表明,沿LiNbO3光轴方向通光的横向电光调制有相同的电光参量,折射率感应主轴的位置与电场方向有关;3种不同切型的横向体电光调制器的零场泄露...
Analysis of As2S3-Ti: LiNbO3 Taper Couplers Using Supermode Theory
Optical Waveguides Couplers Coupled Mode Analysis
2013/1/30
In this work, we develop a simulation method based on supermode theory and transfer matrix formalism, and then apply it to the analysis and design of taper couplers for vertically integrated As2S3 and...
在同成分LiNbO3中,掺入ZnO的摩尔分数分别为1%、3%、5%、7%和9%,掺入（质量分数）0.03% MnCO3和0.08%Fe2O3,采用提拉法生长了优质Zn∶Mn∶Fe∶LiNbO3晶体.测试Zn∶Mn∶Fe∶LiNbO3晶体的OH-红外吸收光谱,抗光损伤能力和位相共轭性能.Zn离子浓度在7%和9%时,OH-吸收峰移到3 528 cm－1,讨论OH-吸收峰移动机理.随着Zn离子浓度增加,...
LiNbO3∶In∶Fe∶Cu晶体中的双波长非易失存储
非易失记录 蓝光光折变 灵敏度
2009/8/27
了提高晶体的非易失存储性能，采用双波长存储技术实验研究了LiNbO3∶In∶Fe∶Cu晶体中的非易失存储，折射率调制度为1.04×10－4，记录灵敏度达到0.965 cm/J.与传统的双色非易失记录相比，该方法大幅度地提高了光栅的强度和记录的灵敏度.利用Kukhtarev带输运模型对双波长非易失记录过程中光栅的动态演化过程进行了数值模拟，同时讨论了氧化还原程度对双波长非易失全息记录的影响.理论与实...
LiNbO3晶体中光折变热固定过程的准实时可视化研究
热固定 光折变LiNbO3晶体 最佳显影时间 数字全息术
2009/8/14
采用数字全息术对LiNbO3∶Fe晶体中高斯光束诱导的折射率变化热固定过程进行了准实时可视化实验研究.实验过程中通过在线加热的方式对光致折射率变化进行固定,采用冷光源提供的非相干白光对热固定的折射率变化进行显影.通过数值再现得到热固定过程中不同阶段的折射率变化分布,根据折射率变化的演化过程确定出了显影的最佳时间.
Fabrication of First-Order Periodically Poled MgO: LiNbO3 Bulks for Ultraviolet Light Generation
QPM SHG Domain inversion
2009/6/8
We propose a novel method for controlling the shape of a short period domain-inverted structure utilizing a multi-pulse poling method. Using this technique, periodically domain-inverted structures wit...
Polarization-Reversal in Stoichiometric LiNbO3/LiTaO3 and Application to Optical Devices
Quasi-phase matching (QPM) LiTaO3 stoichiometry
2009/6/8
A polarization-reversed optical device has been attracting much attention as a next generation device due to its desinability and flexibility. Quasi-phase-matched (QPM) wavelength converters using pol...
Compact and Highly Efficient Intracavity SHG Green Light Source with Wide Operation Temperature Range Using Periodically Poled Mg:LiNbO3
Solid laser Intracavity LiNbO3
2009/6/1
A compact, high power SHG green light source with wide operation temperature range over 30 degrees Celsius has been developed by using a wavelength-locked laser diode and a 0.5mm-long periodically pol...
LiNbO3电光调制器行波电极微波等效折射率的测量
微波等效折射率 电光调制器 行波CPW电极
2009/5/13
LiNbO3电光调制器的设计中,行波电极的微波等效折射率是一个重要的参数。该文通过自行设计的微波探针架及探针,采用差值的方法,在微波网络分析仪上对样品CPW电极的微波等效折射率进行了测量,分析了实测值与理论计算值的偏差,给出了修正因子,研究了微波等效折射率随频率变化的色散现象,并对这种测量方法进行了误差分析,提出了减小误差的方法。
Investigation of nonlinearity of photorefractive effect in LiNbO3
photorefractive effect lithium niobate
2011/5/10
In this paper, the nonlinearities resulting from the simple band transport model of photorefractivity are compared with dependences experimentally obtained in LiNbO3:Fe crystals. The investigation of ...
该项目已彻底解决了一直困扰其商品化的温度稳定性问题，已达到批量生产能力 ，从芯片端面的倾斜研磨抛光，到两个倾斜端面的耦合固定，优化了耦合结构使调整自由度降低到最低，做到材料的热膨胀系数匹配最佳化，设计了专用的工模具，保证达到要求的精度，降低了对操作者素质水平的要求，提高了生产效率，耦合出插入损耗典型值为4dB的器件，-40℃到+80℃的工作温度循环试验中插入损耗变化小于0.4Db。在国内LiNbO...
High-Efficiency Intracavity Continuous-Wave Green-Light Generation by Quasiphase Matching in a Bulk Periodically Poled MgO:LiNbO3 Crystal
Quasiphase Matching LiNbO3 Crystal
2008/10/31
908 mW of green light at 532 nm were generated by intracavity quasiphase matching in a bulk periodically poled MgO:LiNbO3 (PPMgLN) crystal. A maximum optical-to-optical conversion efficien...
Formation of MgO:LiNbO3 Domain-Inverted Gratings by Voltage Application under UV Light Irradiation at Room Temperature
UV Light Room Temperature
2008/10/31
MgO:LiNbO3 is an attractive nonlinear-optic crystal for quasiphasematched (QPM) nonlinear-optic devices. This paper reports a new formation method of domain-inverted gratings for QPM in MgO:LiNbO3. Do...