GBT20, a 20.48 Gbps PAM4 optical transmitter module for particle physics experiments. (28th February 2023)

• Record Type: Journal Article
• Authors: 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.
• Is Part Of: Journal of instrumentation. Volume 18:Number 2(2023)
• Publication Date: 2023-02-28
• Subjects: Front-end electronics for detector readout -- Radiation-hard electronics -- Analogue electronic circuits -- Digital electronic circuits; Scientific apparatus and instruments -- Periodicals; 502.84
• DOI: 10.1088/1748-0221/18/02/C02065
• Languages: English
• ISSNs: 1748-0221

Abstract

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 × 13 mm × 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 7.5 × 10 −14 cm 2 . No significant performance degrades after a TID of 5.4 kGy.