The excess noise characteristics of InGaAs/InP APD in consideration of nonlinearity effect

Yang Tian; Zebiao Lin; Yanli Zhao

doi:10.1117/12.2626413

20 January 2022 The excess noise characteristics of InGaAs/InP APD in consideration of nonlinearity effect

Yang Tian, Zebiao Lin, Yanli Zhao

Proceedings Volume 12154, 13th International Photonics and OptoElectronics Meetings (POEM 2021); 121540T (2022) https://doi.org/10.1117/12.2626413
Event: 13th International Photonics and OptoElectronics Meetings (POEM 2021), 2021, Wuhan, China

Abstract

In general, the excess noise of avalanche photodiodes (APDs) will increase with incident mean optical power (Pin). However, it is found that the excess noise of InGaAs/InP APD decreases rather than increases with Pin in the case of high gain. The experimental and simulated results reveal that this phenomenon can be attributed to the nonlinearity effects, which results in the degradation of gain of APDs. And the nonlinearity effect is more significant with larger gain. Consequently, the excess noise will decrease due to the decreases of gain. For free space optical (FSO) communication systems which commonly operates the APDs at high gain, this discovery can be used to determine the optimum threshold of receivers to achieve the minimum bit error rate (BER).

Citation Download Citation

Yang Tian, Zebiao Lin, and Yanli Zhao "The excess noise characteristics of InGaAs/InP APD in consideration of nonlinearity effect", Proc. SPIE 12154, 13th International Photonics and OptoElectronics Meetings (POEM 2021), 121540T (20 January 2022); https://doi.org/10.1117/12.2626413

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