Direct modulation bandwidth enhancement of DFB laser with groove-in-trench waveguide structure

Yu Han; Qi Tian; Sikang Yang; Jing Luan; Ruigang Zhang; Pengxiang He; Deming Liu; Minming Zhang

doi:10.1117/12.2625456

20 January 2022 Direct modulation bandwidth enhancement of DFB laser with groove-in-trench waveguide structure

Yu Han, Qi Tian, Sikang Yang, Jing Luan, Ruigang Zhang, Pengxiang He, Deming Liu, Minming Zhang

Proceedings Volume 12154, 13th International Photonics and OptoElectronics Meetings (POEM 2021); 121540I (2022) https://doi.org/10.1117/12.2625456
Event: 13th International Photonics and OptoElectronics Meetings (POEM 2021), 2021, Wuhan, China

Abstract

We present a DFB laser with extended direct modulation bandwidth based on groove-in-trench waveguide structure. The threshold currents of the fabricated DFB lasers are 8.0 mA and 19.1 mA at 25 °C and 85 °C, respectively. The 3dB bandwidths of the fabricated laser with an inject current of 60 mA is 29.2 GHz and 16.2 GHz at 25 °C and 85 °C, respectively. By etching groove-in-trench waveguide structure, we obtain a 3dB bandwidth enhancements of 3.5 GHz and 4.6 GHz at 25 °C and 85 °C, respectively. Transmissions of 25.8 Gb/s at 25 °C and 55 °C and 14.0 Gb/s at 85 °C with clear eye openings have been demonstrated.

Citation Download Citation

Yu Han, Qi Tian, Sikang Yang, Jing Luan, Ruigang Zhang, Pengxiang He, Deming Liu, and Minming Zhang "Direct modulation bandwidth enhancement of DFB laser with groove-in-trench waveguide structure", Proc. SPIE 12154, 13th International Photonics and OptoElectronics Meetings (POEM 2021), 121540I (20 January 2022); https://doi.org/10.1117/12.2625456

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