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Optical Engineering

Efficient and low-latency pixel data transmission module for adaptive optics wavefront processor based on field-programmable gate array
Author(s): Haifeng Yang; Yunxia Xia; Haotian Zhang; Mei Li; Changhui Rao
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Paper Abstract

An efficient and low-latency pixel data transmission module for the adaptive optics wavefront processor is presented. A fiber-based custom real-time pixel data transfer protocol is developed, which has the characteristics of long transmission distance, low-latency, and low-protocol overhead. The hardware part of the suite has been verified on different circuit boards with different field-programmable gate arrays. Obtained results demonstrate that the transmission and protocol processing delay are only 413.5 ns, the transmission bandwidth is 3.125 Gbps, and the error rate is less than 1012. Under the same conditions of 156.25 MHz clock frequencies and length of transmission line, compared with the serial front panel data port protocol adopted by the thirty meter telescope and the european southern observatory, the transmission delay is significantly reduced by 2.82 times and has a remarkably low logic occupancy rate through our solution. Also, the method has been applied in several actual projects.

Paper Details

Date Published: 23 June 2015
PDF: 9 pages
Opt. Eng. 54(6) 063106 doi: 10.1117/1.OE.54.6.063106
Published in: Optical Engineering Volume 54, Issue 6
Show Author Affiliations
Haifeng Yang, Institute of Optics and Electronics (China)
Yunxia Xia, Institute of Optics and Electronics (China)
Haotian Zhang, Institute of Optics and Electronics (China)
Mei Li, Institute of Optics and Electronics (China)
Changhui Rao, Institute of Optics and Electronics (China)


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