硫系玻璃微球谐振腔的制备与表征研究

发布时间：2018-03-25 06:43

  本文选题：微球谐振腔　切入点：回廊模式　出处：《宁波大学》2017年硕士论文

【摘要】：近年来,回廊模(Whispering-Gallery Mode,WGM)特性光学微球腔因具有高品质因数(Q-factor)、极小的模式体积(Vm)、窄线宽等优点,吸引了众多学者的研究兴趣。同时,微球腔体积极小,腔内能量密度极高,并且其光学性能优良,制备方法简单方便,易于与其他器件集成。基于以上优良特性,光学微球腔在低阈值激光器、非线性光学、腔量子电动力学、高灵敏度传感器和窄带滤波器等诸多领域都有非常大的应用潜力。本论文主要研究无源和Tm~(3+)掺杂有源硫系玻璃微球腔的制备及其回廊模式的表征。硫系玻璃作为一种新型红外光功能玻璃,具有较宽的红外透过窗口(透过范围0.5~25μm)、较高的红外光谱透过特性(透过率大于60%)、极高的线性与非线性折射率(n1=2.0~3.5,n2=2.0~20×10~(-18) m~2/W)以及极低的声子能量(小于350 cm-1)等特点。因此,本论文围绕硫系玻璃微球谐振腔的制备工艺与相关光学特性进行深入研究,其详细内容如下:论文第一章为绪论,主要介绍了回廊模式微腔尤其是玻璃微球腔的国内外研究现状和近几年来的重点应用领域。然后提出了本论文的研究内容为无源和有源Tm~(3+)掺杂硫系玻璃微球的制备及表征,本章最后介绍了本论文工作的内容和意义。论文第二章为微球腔基础理论介绍。从麦克斯韦方程组出发,对微球谐振腔中的回廊模式场解进行了分析,进一步得到模式的特征方程、解析表达式以及描述某一模式的四个特征量。最后介绍了光在光纤锥中的传播及微球腔与光纤锥的耦合系统。论文第三章为全部实验流程介绍部分。首先介绍了硫系玻璃的制备方法和流程,并在此基础上介绍了玻璃微球谐振腔的制备过程。然后对石英光纤锥的制备装置,制备过程进行了阐述,通过装置改进得到了实验要求的光纤锥。最后介绍了微球谐振腔与石英光纤锥耦合测试系统。论文第四章重点介绍无源Ge_(28)Sb_(12)Se_(60)(简称Ge_(28))硫系玻璃微球谐振腔特性研究。首先介绍了Ge_(28)样品玻璃的制备及其性能测试。然后介绍了Ge_(28)玻璃微球的制备结果,从中可以看到我们制备的Ge_(28)微球腔具有良好的球形度和表面光洁度。接着介绍了Ge_(28)微球腔与石英光纤锥的耦合测试过程,成功得到其光学回廊模光谱并对其特性进行分析。最后是对Ge_(28)微球腔的Q值进行测试分析。得到微球在1544.86 nm处的品质因数Q≈1.717×104。论文第五章主要是对Tm~(3+)掺杂Ge-Ga-S玻璃微球谐振腔特性的研究。首先介绍了制备Tm~(3+)掺杂Ge-Ga-S基质玻璃的过程,然后介绍了玻璃样品的相关性能测试并利用已有基质玻璃制备了Tm~(3+)掺杂Ge-Ga-S玻璃微球腔。最后是Tm~(3+)掺杂Ge-Ga-S玻璃微球腔与石英光纤锥的耦合系统搭建、荧光回廊模特性分析以及Q值测试分析。论文第六章为本论文总结部分,提出了研究过程中存在的问题以及在日后的工作中需要进一步探讨的地方。
[Abstract]:In recent years, the characteristic optical microsphere cavity of Whispering-Gallery mode WGMhas attracted the research interest of many scholars because of its advantages of high quality factor (Q-factor), very small mode volume, narrow linewidth, etc. At the same time, the microsphere cavity is active and has a very high energy density. And its optical properties are excellent, the preparation method is simple and convenient, and it is easy to integrate with other devices. Based on the above excellent properties, the optical microsphere cavity is used in low threshold laser, nonlinear optics, cavity quantum electrodynamics, High sensitivity sensors and narrow band filters have great potential applications. In this thesis, the preparation and characterization of passive and Tm~(3 doped active sulfur glass microspheres are studied. Is a new type of infrared functional glass. It has the characteristics of wide infrared transmission window (transmission range of 0.5 ~ 25 渭 m), high infrared spectral transmission characteristics (transmittance greater than 60 ~ (-1), extremely high linear and nonlinear refractive index (n ~ (1)) 2. 0 ~ (3. 5) n ~ (2) N ~ (2) 2 ~ (20) 脳 10 ~ (10) ~ (-18)) and very low phonon energy (less than 350 cm ~ (-1)). In this paper, the fabrication technology and optical properties of the sulfur glass microsphere resonator are studied in detail as follows: the first chapter is the introduction. In this paper, the research status of corridor mode microcavity, especially glass microsphere cavity, and its application in recent years are introduced. Then, the preparation and characterization of sulfur doped glass microspheres with passive and active Tm~(3 are presented in this paper. In the second chapter, the basic theory of microsphere cavity is introduced. Based on Maxwell's equations, the solution of corridor mode field in microsphere resonator is analyzed. Further, the characteristic equation of the model is obtained. The analytical expression and the four characteristic quantities describing a certain mode are given. Finally, the propagation of light in the fiber cone and the coupling system between the microsphere cavity and the fiber cone are introduced. Preparation method and process of Sulphur glasses, On this basis, the fabrication process of glass microsphere resonator is introduced. The experimental requirements of optical fiber cones are obtained through the improvement of the device. Finally, the measurement system of coupling of microsphere resonator and quartz fiber cone is introduced. In chapter 4, the characteristics of passive GeN28 / SbSbS / SbSZ / S / S / S / S / S / S / S / S / S / S / S / S microsphere cavity are mainly introduced in this paper, and the characteristics of the resonant cavity of the S / S glass microspheres are also studied. In this paper, the preparation and performance test of GeStat 28) glass are introduced, and the results of the preparation of GeStat 28 glass microspheres are introduced. It can be seen that the microsphere cavity prepared by us has good sphericity and surface finish. Then, the coupling test process between the microsphere cavity and the quartz fiber cone is introduced. Finally, the Q value of the microsphere cavity was measured and analyzed. The quality factor of the microsphere at 1544.86 nm was obtained, Q 鈮，

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