DOE OSTI · 1958785
GBT20, a 20.48 Gbps PAM4 Optical Transmitter Module for Particle Physics Experiments
Abstract
We present a pluggable radiation-tolerant 4-level Pulse-Amplitude-Modulation (PAM4) optical transmitter module called GBT20 (Giga-Bit Transmitter at 20 Gbps) for particle-physics experiments. GBT20 has an OSFP or firefly connector to input 16-bit data each at 1.28 Gbps. The GBT20 drives a VCSEL die with an LC lens or a VCSEL TOSA and interfaces an optical fiber with a standard LC connector. The minimum module, including the host connector, occupies 41 mm x 13 mm x 6 mm. At 20.48 Gbps, the minimum Transmitter Dispersion Eye Closure Quaternary (TDECQ) is around 0.7 dB. The power consumption is around 164 mW in the low-power mode. The SEE cross-section is below 7.5x10^(-14) cm^2. No significant performance degrades after a TID of 5.4 kGy.
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Deng, B., Zhang, L., Chao, C.-P., Chen, S.-W., Cruda, E., Gong, D., Hou, S., Huang, G., Huang, X., Li, C.-Y., Liu, C., Liu, T., Liu, E. R., Sun, Q., Sun, X., Wong, G., Ye, J.. 2023-02-15. GBT20, a 20.48 Gbps PAM4 Optical Transmitter Module for Particle Physics Experiments. https://www.osti.gov/biblio/1958785
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