Abstract
The whispering-gallery mode microlasers with the merits of small size and low power consumption are suitable for chip-based photonic integration. In this paper, the nonlinear dynamics for microdisk laser subject to optical injection is investigated for potential applications including photonic microwave generation and improved modulation characteristics. The four-wave mixing, period-one and period-two oscillations, and optical injection locking states are investigated based on the lasing spectra and generated microwave for a 10-μm-radius directional emission microdisk laser. Furthermore, direct modulation bandwidth enhancement from 5.6 to 17.6 GHz is observed for the injection-locked microdisk laser biased at 7 mA. The results reveal the necessity of further explore toward the potential applications of microdisk lasers under optical injection in photonic integrated chip.
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