Integrated electro-absorption-modulated distributed feedback laser diodes (EMLs) are attracting much interest in optical communications for the advantages of a compact structure, low power consumption, and high-speed modulation. In integrated EML, the microwave interaction between the distributed feedback laser diode (DFB-LD) and the electro-absorption modulator (EAM) has a nonnegligible influence on the modulation performance, especially at the high-frequency region. In this paper, integrated EML was investigated as a three-port network with two electrical inputs and a single optical output, where the scattering matrix of the integrated device was theoretically deduced and experimentally measured. Based on the theoretical model and the measured data, the microwave equivalent circuit model of the integrated device was established, from which the microwave interaction between DFB-LD and EAM was successfully extracted. The results reveal that the microwave interaction within integrated EML contains both the electrical isolation and optical coupling. The electrical isolation is bidirectional while the optical coupling is directional, which aggravates the microwave interaction in the direction from DFB-LD to EAM.

Fei Yuan;Chao Jing;Meng-Ke Wang;Shang-Jian Zhang;Zhi-Yao Zhang;Yong Liu

School of Optoelectronic Science and Engineering,University of Electronic Science and Technology of China,Chengdu 611731

电子科技学刊

[1]Fei Yuan;Chao Jing;Meng-Ke Wang;Shang-Jian Zhang;Zhi-Yao Zhang;Yong Liu-.Measurement and Characterization of Microwave Interaction between Integrated Distributed Feedback Laser Diode and Electro-Absorption Modulator)[J].电子科技学刊,2022(04):375-382

EMLs

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