【作者】 杜宏伟；

【导师】 黄永清；

【作者基本信息】 北京邮电大学 ， 电磁场与微波技术， 2008， 硕士

【摘要】 本论文工作是围绕任晓敏教授担任首席科学家的国家973项目分课题“单片集成光电子器件的异质兼容理论与重要结构工艺创新”（项目编号:2003CB314901）,教育部“新世纪人才支持计划”（NCET-05-0111）和国家863研究项目“用于可重构分插复用具有波长处理机制的平面光集成解复用接收器件的研究”（项目编号:2007AA032418）展开的。近年来,对通信带宽的需求不断增长,推动了光通信技术的飞速发展。波分复用（WDM）技术作为长距离大容量通信技术的首选,获得了快速发展。作为其中关键技术之一的波长解复用接收器件是波分复用技术能够应用于实际通信系统并发挥自身强大功能的保证。目前普遍采用的解复用接收器件由“解复用器/滤波器+探测器”组合而成,这种分立方式存在很多缺点,如成本高、尺寸大以及额外的插入损耗等。相对于分立器件而言,集成光电子器件可以在同一芯片中集成多个不同功能的元器件,通过元器件的组合可以实现比分立器件更复杂的功能,同时由于其具有更紧凑的结构,更小的光学和电学连接损耗,具有较好光学和电学性能,稳定性和可靠性方面都更具优势,且极大地降低了器件封装的成本。谐振腔增强型（RCE）光电探测器是一类具有开拓创新意义的集成了解复用与接收功能的新型垂直腔器件,RCE光探测器在一定程度上解决了传统PIN光探测器的量子效率和响应速度之间存在相互制约的问题,同时具有波长选择和吸收的功能,作为波分复用（WDM）光通信中的高性能、低成本的新型集成解复用接收器件得到了广泛的关注。本论文对波分复用系统中的集成解复用接收技术进行了研究。以下是本论文的主要工作:1、对波分复用技术的发展情况、波分复用系统中的关键技术、用于光纤通信的高速光探测器进行了总结和探讨。2、提出了一种新型的并行探测集成解复用接收器,利用转移矩阵方法对这种新型并行解复用接收器进行了理论分析,给出了并行解复用接收器并行探测四个波长的具体设计实例。最后使用数值模拟的方法对这种新型并行探测集成解复用接收器的解复用性能和串扰特性进行了计算,并作了分析,分析表明此结构的集成解复用接收器有较好的解复用性能,有望用于WDM系统中。3、为了实现阶梯腔结构的并行探测集成解复用接收器,用湿法腐蚀在同一个GaAs基片上得到了四个不同厚度的阶梯结构,用显微镜观察了制备的阶梯结构GaAs基片,记录下了表面显微图和横截面显微图,测量出了阶梯相差的厚度,并计算出了H₂SO₄:H₂O₂:H₂O=1:1:30腐蚀GaAs基片的腐蚀速率大约是1.985nm/s。为最终成功实现可控的阶梯腔的实验制备,积累了实验经验和实验数据。4、为了改进一镜斜置三镜腔结构,增加光在吸收腔中的反射次数,使得光得到更充分的吸收,研究了弧形悬臂的制作。用选择性腐蚀方法在InP基片上制作出了弧形悬臂,并对不同悬臂尺寸作了扫描电镜测量,悬臂尺寸不同的时候,得到了不同角度的弧形悬臂。更多还原

【Abstract】 The research work in this thesis was supported by grants from one of the sub-projects of National Basic Research Program of China （National "973" Program No.2003CB314901, Prof. Ren Xiao-min as Chief Scientist）, New Century Excellent Talents at the University of China （NCET-05-0111） and National High Technology R&D Project （National "863" Project No. 2007AA03Z418）.Recently, the increasing demand for bandwidth of telecommunication has greatly promoted the development of optical fiber communications. One of the promising technologies is wavelength-division multiplex （WDM） that has been developed rapidly in the long haul communications. Wavelength-selective receiving has become the key technology of WDM applications. The structure of current demultiplexing receiver is basically "demultiplexer + photodetector" and its performance is not quite well, such as high cost, over-size and additional insertion loss etc. In comparison, the integrated optoelectronic devices can integrate several different optoelectronic components; they can achieve more functions than the devices which are based on the combination of separate components. At the same time, due to a more compact structure, weak optical and electrical connections loss, optical and electrical properties, the integrated optoelectronic devices are more advantages on stability, and reliability, and greatly reduce the cost of the device package.Resonant-cavity-enhanced（RCE） photodetectors is a kind of innovative vertical cavity structure, which integrats demultiplexing and receiving functions in one, with placing a PIN photodetector in Fabry-Perot （F-P） cavity. RCE photodetectors decouples the quantum efficiency （QE） with the carrier transiting time and overcome the tradeoff between QE and response speed lies in conventional PIN photodetectors to some extend. The enhanced effect in resonant wavelengths resulting form resonant cavity enables RCE photodetectors with inherent wavelength selectivity, which is quite attractive for WDM systems. In this thesis, the Integrated Wavelength Demultiplexing Photodetecting Technologies for the WDM are studied.The main research work is listed below:1、Summed up the development of WDM system, the key technologies of WDM application, high-speed photodetectors in optical fiber communications.2、A novel integrated demultiplexing receiver for parallel detecting is proposed, which is analyzed by the method of transfer matrix. An example of this kind of the novel integrated demultiplexing receiver which can detect four light-waves parallelly was designed, the demultiplexing capability is investigated and the cross-talk is calculated. The result demonstrated that the demultiplexing performance of this receiver is preferable, and can be applied in the WDM system.3、In order to get the parallel integrated demultiplexing receiver with the ladder structure, I got four different thickness of the ladder structure by wet etching in the same GaAs substrate, observed the ladder structure of the GaAs substrate, recorded the surface and cross-section micrograph, measured the thickness difference between the ladders, and calculated the etching rate of the H₂SO₄: H₂O₂: H₂O=1: 1: 30 which is about 1.985nm/s. All of that accumulated the experimental experience and data for realizing the controllable ladder cavity successfully.4、In order to improve the structure of OMITMIC, increase the times of reflection in the absorbing cavity, and make the light be absorbed more sufficiently, I studied the fabrication of the curved cantilever. By the way of selected etching, I fabricated the curved cantilevers on the InP substrate, and then measured the sizes of the curved cantilevers by SEM. The curved cantilevers have different angles with different sizes.更多还原