Investigation of self-injection locking threshold on a quantum dot comb laser

Chun-Ying Song; Zhenguo Lu; Yang Qi; Philip J. Poole; Guocheng Liu; Jiaren Liu; Martin Vachon; Xiaoran Xie; John Weber; Youxin Mao; Pedro Barrios; Ping Zhao; Philip Waldron; Mohamed Rahim

doi:10.1117/12.3001740

8 March 2024 Investigation of self-injection locking threshold on a quantum dot comb laser

Chun-Ying Song, Zhenguo Lu, Yang Qi, Philip J. Poole, Guocheng Liu, Jiaren Liu, Martin Vachon, Xiaoran Xie, John Weber, Youxin Mao, Pedro Barrios, Ping Zhao, Philip Waldron, Mohamed Rahim

Author Affiliations +

Proceedings Volume 12882, Optical Components and Materials XXI; 1288209 (2024) https://doi.org/10.1117/12.3001740
Event: SPIE OPTO, 2024, San Francisco, California, United States

Abstract

In this work, we demonstrate the establishment of a self-injection locking threshold in a quantum dot (QD) comb laser with a Fabry-Perot cavity and an external feedback loop. This process involves controlling injection power and polarization to inject a controlled fraction of lasing power back into the QD laser source. The study is focused on the single line self-injection locking effects. The self-injection locking process was characterized by a self-injection locking threshold power (P_SIL) and a locked power (P_locked). The self-injection locking process begins from the threshold power P_SIL and followed by a magnified enhancement till it reaches the locked power (P_locked). Once in the locked region, the enhancement effect starts to stabilize and is only weakly influenced by injection power. The established threshold provides a distinctive condition for the measurements of the modified optical properties of the coupled cavity system. Additionally, the locked single lines tested at different currents indicated a very broad spectral coverage which are much larger than the original bandwidth of free running QD laser.

Conference Presentation

(2024) Published by SPIE. Downloading of the abstract is permitted for personal use only.

Citation Download Citation

Chun-Ying Song, Zhenguo Lu, Yang Qi, Philip J. Poole, Guocheng Liu, Jiaren Liu, Martin Vachon, Xiaoran Xie, John Weber, Youxin Mao, Pedro Barrios, Ping Zhao, Philip Waldron, and Mohamed Rahim "Investigation of self-injection locking threshold on a quantum dot comb laser", Proc. SPIE 12882, Optical Components and Materials XXI, 1288209 (8 March 2024); https://doi.org/10.1117/12.3001740

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