Photonic Generation of Tunable Sub-THz Signals Using Two Semiconductor Lasers with Highly Asymmetric Mutual Coupling

This research investigates an approach for generating tunable sub-THz signals using the period-one nonlinear dynamics of optically injected semiconductor lasers. Specifically, a novel all-optical stabilization method based on highly asymmetric mutual injection is proposed, aimed at enhancing the spe...

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Bibliographic Details
Main Authors: Tseng, Chin-Hao, Liao, Bin-Kai, Hwang, Sheng-Kwang
Format: Conference Proceeding
Language:English
Subjects:
linewidth narrowing
Masers
Microwave theory and techniques
Mutual coupling
Optical coupling
period-one nonlinear dynamics
phase noise reduction
Photodetectors
Power lasers
Semiconductor lasers
sub-THz signal
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Summary:This research investigates an approach for generating tunable sub-THz signals using the period-one nonlinear dynamics of optically injected semiconductor lasers. Specifically, a novel all-optical stabilization method based on highly asymmetric mutual injection is proposed, aimed at enhancing the spectral purity of the produced sub-THz signals. As a result, we have successfully generated a sub-THz signal at 108.7 GHz, characterized by a 3-dB linewidth of less than 2 kHz and a side-peak suppression ratio of 46 dB. Moreover, by merely adjusting the power and frequency of the optical injection, it is possible to generate sub-THz signals with comparably high spectral purity across a range from 100 GHz to 300 GHz.
ISSN:2576-7216
DOI:10.1109/IMS40175.2024.10600298