Mr. QingYang Li Profile

QingYang Li

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Proceedings Article | 15 December 2023 Paper

Optical module sensitivity optimization and applications

QingYang Li, LiPing Sun, YuBang Sheng, XiaFang Lin, ZhuJuan Wang, JunHong Cao

Proceedings Volume 12971, 129710M (2023) https://doi.org/10.1117/12.3017553

KEYWORDS: Error analysis, Receivers, Eye, Signal to noise ratio, Light sources, Signal attenuation, Photodetectors, Optical transmission

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In the era of intelligence, data traffic has exploded, and optical modules, as one of the components of optical communication, play a crucial role, which is used in data centers, metropolitan area network optical transmission networks and 5G bearer networks. In optical communication system, high sensitivity optical module is one of the key factors that affect the normal operation of the system. Aiming at the influence of high sensitivity on the performance of optical module, a sensitivity optimization scheme of optical module is proposed. This paper introduces the influence of TIA on the sensitivity of ROSA component of 25G SR SFP28 optical module. Theoretical analysis and experimental comparison are used to analyze PIN-TIA and AGC circuits and overload characteristics, and the problem of interval error of optical module is analyzed by focusing on the wiring length of TIA-PD and testing. The influence of TIA-PD wire length and TIA 𝑉_𝐴𝐺𝐶 parameter on the sensitivity of optical module is realized, and the problem of sensitivity optimization of optical module is solved. The results show that the low light sensitivity of the optical module can be optimized by shortening the length of the TIA-PD line within the allowable range of the chip equipment. If the TIA 𝑉_𝐴𝐺𝐶 parameter is too low, the sensitivity of the optical module in the large optical area will be abnormal.

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