Linearization of two cascaded intensity-modulator-based analog photonic link

Xiang Zhu; Tao Jin; Hao Chi; Jinhai Zhou; Guochuan Tong; Dong Li; Lulu Zuo; Ying Fu

doi:10.1117/1.OE.57.8.080501

6 August 2018 Linearization of two cascaded intensity-modulator-based analog photonic link

Xiang Zhu, Tao Jin, Hao Chi, Jinhai Zhou, Guochuan Tong, Dong Li, Lulu Zuo, Ying Fu

Author Affiliations +

Optical Engineering, Vol. 57, Issue 8, 080501 (August 2018). https://doi.org/10.1117/1.OE.57.8.080501

Abstract

A linearization scheme based on two cascaded intensity modulators is proposed and experimentally demonstrated. By optimizing the biases, the power ratio and the phase difference between the drive signals applied to the two Mach–Zehnder modulators (MZMs), the third-order intermodulation distortion (IMD3) can be effectively eliminated over a wide operating bandwidth of 1 to 12 GHz without the same RF phase at two modulators, which is required in previous works. The ratio of the fundamental output to the IMD3 reaches 50.21 to 63.28 dB, which has an improvement of 18.35 to 31.42 dB compared to that of a single MZM link.

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Xiang Zhu, Tao Jin, Hao Chi, Jinhai Zhou, Guochuan Tong, Dong Li, Lulu Zuo, and Ying Fu "Linearization of two cascaded intensity-modulator-based analog photonic link," Optical Engineering 57(8), 080501 (6 August 2018). https://doi.org/10.1117/1.OE.57.8.080501

Received: 9 July 2018; Accepted: 25 July 2018; Published: 6 August 2018

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