光学精密工程2025，Vol.33Issue(11)：1793-1802,10.DOI:10.37188/OPE.20253311.1793
高速CMOS图像数据的光纤传输系统
Fiber optic transmission system for high-speed CMOS image data
摘要
Abstract
To address challenges associated with multiple cables and significant link loss in high-speed CMOS image data transmission,a fiber-optic transmission system for high-speed CMOS image data was investigated.The limiting factors of high-speed fiber-optic transmission were identified,with particular emphasis on the transmission link within the fiber-optic module.The electrical signal link was determined as the critical element impacting overall transmission performance.Initially,based on the transmitter's full-temperature-range transmission capability and the receiver's minimum required signal amplitude for stable operation,the maximum permissible insertion loss for the electrical transmission link was estab-lished.Employing an insertion loss model for the transmission link,the reliable transmission distance was quantified,constrained primarily by the dielectric constant and dielectric loss tangent.Subsequently,con-sidering the AC coupling requirements for high-speed signals in fiber-optic modules and the limitations im-posed by the use of small-package nickel-electrode capacitors in high-reliability aerospace applications,compensation strategies were developed to mitigate impedance mismatches caused by large-package cou-pling capacitors and vias.Furthermore,for the Aurora 64b/66b protocol implemented in the GTX mod-ule,a method was proposed that utilizes the empty flag signal of the cache FIFO to restore line boundaries within the data stream,supplemented by the insertion of line head,line end identifiers,and synchroniza-tion headers between the Reed-Solomon encoder and the scrambler to reduce FPGA memory resource con-sumption.Simulation results at a 10 Gb/s transmission rate indicate an echo insertion loss of-10.243 2 dB on the circuit board,surpassing OIF-CEI-04.0 and PCIe 4.0 protocol standard requirements and con-firming high signal transmission quality.The overall insertion loss of-1.477 65 dB also exceeds link specification demands.Software testing over 48 hours demonstrated a bit error rate of 5.789×10⁻¹⁶,con-firming the system′s stability and reliability.Comparative analysis between the novel and conventional methods reveals that the proposed protocol interface reduces FPGA storage resource usage by 3.6%,highlighting its efficiency and practical significance.关键词
高速CMOS图像数据/光纤传输系统/插损模型/回波和插入插损/GTX模块/aurora64b66b协议Key words
high-speed CMOS image data/optical fiber transmission system/insertion loss model/echo and insertion loss/GTX module/aurora 64b/66b protocol分类
航空航天引用本文复制引用
余达,郑柯,王昱淇,刘金国,司国良,邵帅,陈欣然,杨秀策,周瑜,周欣..高速CMOS图像数据的光纤传输系统[J].光学精密工程,2025,33(11):1793-1802,10.基金项目
智慧地球重点实验室开放基金资助项目(No.KF2023YB02-01) （No.KF2023YB02-01）
