基于重构等效啁啾技术的串联可调谐光模块的封装研究

发布时间：2018-01-11 04:30

本文关键词：基于重构等效啁啾技术的串联可调谐光模块的封装研究　出处：《南京大学》2015年硕士论文　论文类型：学位论文

【摘要】：随着移动通信宽带接入、固定宽带接入等通信业务的不断普及以及云计算、互联网和大型数据中心的迅猛发展,下一代WDM传输系统和光网络中心对数据传输速率和处理信息的能力几乎成指数型增长,使得如今信息化社会对带宽的需求达到前所未有的高度。低成本的WDM技术应用需求非常强劲。密集波分复用技术(Dense wavelength division multiplexing, DWDM)是有效提高带宽、实现高速传输的关键技术之一,实现光电之间转换功能的DWDM光模块成为关键器件,集成度高、体积小、成本低、功耗低、传输速率高、波道间串扰少、传输容量大、传输距离长是可调谐光模块的发展趋势。串联可调谐光模块具有体积小、波长在设计的通信波段可任意切换调谐的灵活性、性能稳定、制作成本低等优势,满足了光传输容量和速率的需求。因此,串联可调谐激光器阵列光模块在实现光接入网的数据传输和带宽集成方面被认为是最合适的技术之一。本论文主要研究基于重构等效啁啾技术的串联可调谐激光器阵列光模块的封装工作的研究,成功研制了八通道串联可调谐半导体激光器1550nm光发射模块。开展了八通道可调谐激光器模块的封装结构设计、理论分析、模块组装以及性能测试等研究工作。针对半导体激光器芯片的工作原理,设计了激光器芯片、TEC、透镜、隔离器、准直器和单模光纤输出耦合的封装结构,固定各个分立的元件,完成管芯级器件封装；并设计了驱动电路、温控电路等模块,实现电流和温度信息的采集和反馈,在此基础上完成了单模光纤输出的可调谐激光器模块的组装。通过对温度、电流参数的优化,模块最终实现在1535nm~1560nm波段25.6nm范围内连续可调,符合ITU-T标准的60个波长通道输出,且模块的输出波长可根据要求在所有通道内任意切换。在整个调谐范围内,输出光功率在-12dBm以上,波长的边模抑制比(Side Mode Suppression Ratio, SMSR)在40dB以上,正常工作时耦合进单模光纤的光功率可达到lmW以上。在传输性能方面,可调谐光模块的线宽在10MHz以下,对该模块进行10km传输时的眼图效果测试,外调制10 GHz信号,观察眼图,得到了很好的传输结果。结果表明REC技术在制作能够满足波分复用无源光网络(Wavelength Division Multiplexing-Passive Optical Network, WDM-PON)要求的可调谐激光器模块上有很大的应用前景,模块应用在下一代光网络并实现产业化的可能性。本论文围绕基于重构等效啁啾(REC)技术的八通道串联可调谐激光器封装模块开展理论和实验研究,介绍了光通信的发展历史、WDM-PON技术,阐述了半导体激光器光模块的分类和研究进展,讨论了目前各种光模块的封装制造技术、REC技术的原理及利用该技术制作DFB激光器阵列的工艺流程,串联可调谐激光器发射光模块的耦合光路分析、封装设计和制造工艺流程,对阵列激光器模块的封装具有一定的参考价值。本论文的主要研究内容如下：基于REC技术的八通道串联可调谐激光器模块的封装进行了系统的理论和实验研究。着重开展了采用TEC控温电流直接调制的蝶形封装激光器阵列光模块的光路设计、结构设计和实际研制等工作。根据激光器的光电特性,研究了温度电流对激光器性能的影响,并采用温度电流补偿功率进行波长调谐,为提高耦合效率并降低成本,采用透镜、隔离器、准直器耦合到单模光纤的简单的封装方式。在研制阵列激光器的封装模块过程中,探索并搭建了多通道串联可调谐激光器芯片的测试平台,设计了驱动电路及温度控制模块实现电流和温度信息的反馈,通过优化工艺参数,提高光模块的耦合效率,稳定封装工艺,提高良品率,最终实现ITU-T标准通信波长输出。本论文实现了八通道串联激光器光模块的研制工作,在传统的单芯片封装方式的基础上进行优化设计,解决了串联阵列芯片封装工艺的难题,并实现光发射模块波长可调,在16.8GHz信号10km传输性能稳定,具有制作成本低、性能稳定等特点,在实验制作和实际应用中有着很大的意义。
[Abstract]:With the development of mobile communication and broadband access, fixed broadband access and other communications services and the growing popularity of cloud computing, the Internet and the rapid development of large data centers, the ability of the next generation of WDM transmission system and optical network center for the rate of data transmission and processing of information almost exponential growth, which is now the information society's demand for bandwidth to hitherto unknown the application of WDM technology. High demand low cost is very strong. DWDM Technology (Dense wavelength division multiplexing, DWDM) is effective in improving the bandwidth, one of the key technologies of high-speed transmission, the realization of DWDM optical module become the key device between the photoelectric conversion function, high integration, small volume, low cost, power consumption low, high transmission rate, channel crosstalk, large transmission capacity, long transmission distance is the trend of development of tunable optical module. The series of tunable optical module has a body Small, arbitrary switching wavelength can be tuned in the communication band design flexibility, stable performance, low manufacturing cost advantages, to meet the light transmission capacity and the rate of demand. Therefore, a series of tunable laser array optical module in data transmission bandwidth and realizing integration of optical access network is considered to be one of the most appropriate technology. This paper mainly studies the research work of the series based on encapsulation technology of reconstruction equivalent chirp tunable laser array optical module, has successfully developed eight channel series tunable semiconductor laser 1550nm light emitting module. Theoretical analysis of package structure design, carry out the eight channel tunable laser module, module assembly and performance testing research work. According to the principle of semiconductor laser chip, the design of laser chip, TEC, lens, isolator, collimator and single-mode fiber output package Fixed structure, discrete components, complete the die level device package; and the design of the driving circuit, temperature control circuit and other modules, to realize the current and temperature information collection and feedback, based on a single-mode fiber output of the tunable laser module assembly. Based on the current temperature, optimization parameters, finally realize the continuous module adjustable in the range of 25.6nm 1535nm~1560nm band, 60 wavelength channel output conforms to the ITU-T standard, the output wavelength and module according to the requirements of any in all channel switching. During the whole tuning range, output power is over -12dBm, side mode suppression ratio (Side wavelength Mode Suppression Ratio, SMSR) in more than 40dB the optical power coupled into a single-mode fiber, normal working hours can reach more than lmW. In the transmission performance, tunable optical module width below 10MHz, 10km on the transmission module The eye test results, 10 GHz external modulation signal, observe the eye diagram, obtained transmission good results. The results show that REC technology can meet the wavelength division multiplexing passive optical network (Wavelength Division Multiplexing-Passive Optical in Network, WDM-PON) requirements can have great application potential in tunable laser module, the module used in the next generation optical network and possibility of realizing industrialization. This paper focuses on reconstruction equivalent chirp (REC) technique based on eight channel series tunable laser package module to carry out theoretical and experimental research, introduces the development history of WDM-PON optical communication technology, expounds the classification and research progress of optical module of semiconductor laser, discussed several kinds of optical module packaging manufacturing technology, and using the principle of REC technology and the technological process for making DFB laser array series, tunable laser light emission module Analysis of coupling block, package design and manufacturing process, the array laser module packaging has a certain reference value. The main research contents of this thesis are as follows: Based on the eight channel REC Technology Series tunable laser module packaging was studied theoretically and experimentally. Focuses on the optical design of butterfly package laser array optical module using direct current modulation TEC temperature control, structure design and actual development. According to the photoelectric characteristics of the laser, the effects of temperature on the current performance of the laser, and the temperature compensation of current power tuning, in order to improve coupling efficiency and reduce the cost, the isolator, collimator lens, coupling to fiber simple package. The package module development process of laser array, to explore and build a multi channel series tunable laser The test chip platform, realization of feedback current and temperature information of driving circuit and temperature control module design, by optimizing process parameters and improve the coupling efficiency of the optical module, stable packaging process, improve yield rate, finally realizes the ITU-T standard communication wavelength. The development work to achieve the eight channel series laser light module the optimization design based on single chip package of traditional way, solve the problem of tandem array chip packaging technology, and the realization of wavelength tunable optical transmitter module, signal transmission in 16.8GHz 10km has stable performance, low production cost, stable performance characteristics, is of great significance in experiment and actual production in the application.

【学位授予单位】：南京大学
【学位级别】：硕士
【学位授予年份】：2015
【分类号】：TN929.1

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