6.25Gbps×12通道小型甚短距离并行光收发模块的研制  

Compact 6.25 Gbps×12-channel VSR parallel optical transceiver

作　　者：高巍[1] 万里兮[1] 李志华[1] 李宝霞[1] 宋见[1] 

机构地区：[1]中国科学院微电子研究所,北京100029

出　　处：《应用光学》2011年第6期1275-1281,共7页Journal of Applied Optics

基　　金：国家科技重大专项(2009ZX02038);国家高技术研究发展计划(863)(2007AA01Z2a6)

摘　　要：介绍了一款基于系统级封装技术的低成本、收发一体、可带电热插拔的12通道小型光模块的研制。该光模块采用850nm垂直腔面发射激光器阵列及其驱动器作为发射端,光电探测器阵列及其跨阻放大器作为接收端,通过光路无源对准实现了低成本光互连。高速度、高密度封装下的瞬态同步开关噪声、芯片间电磁干扰、通道间串扰、反射等电学问题是实现模块整体性能的难点。基于埋入技术的新型滤波器的使用实现了封装尺寸小型化且改善了电源网络的完整性;基于电磁场、传输线理论的信号完整性设计减小了通道间串扰且通过补偿阻抗不连续结构增加了通道带宽。模块背靠背眼图测试结果显示6.25Gbps速率下系统传输零误码。A compact 12-channel parallel optical transceiver with data rate up to 6.25 Gb/s per channel for very short reach（VSR） interconnection based on system-in-package（SiP） techno-logy was implemented and tested.An 850nm vertical cavity surface emitting laser（VCSEL） array with a laser driver die was used as the light source of the transmitter,and a photodiode（PD） array with a trans-impedance amplifier/limiting amplifier（TIA/LA） die was adopted as the detector of the receiver.Passive alignment was used to reduce cost.The electrical design for high frequency and high density package is critical,due to the issues related to power inte-grity（PI） and signal integrity（SI）.To meet the needs for small size package,passive embedded substrate was used to suppress the simultaneous switching noise（SSN） and improve PI.To improve the impedance discontinuity,based on electromagnetic and transmission line theories,SI design was made to reduce the crosstalk and maximize the channel bandwidth.The back-to-back eye diagram measurement results showed that the bit rate of each channel reached 6.25 Gbps.

关 键 词：光纤通信 光收发模块 高速数字设计 电源完整性 信号完整性 

分 类 号：TN929.11[电子电信—通信与信息系统]