Reflection sensitivity of dual-state quantum dot lasers

Zhiyong Jin, Heming Huang, Yueguang Zhou, Shiyuan Zhao, Shihao Ding, Cheng Wang, Yong Yao, Xiaochuan Xu, Frédéric Grillot, Jianan Duan*

*Corresponding author for this work

Research output: Contribution to journalJournal articleResearchpeer-review

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Abstract

This work experimentally and theoretically demonstrates the effect of excited state lasing on the reflection sensitivity of dual-state quantum dot lasers, showing that the laser exhibits higher sensitivity to external optical feedback when reaching the excited state lasing threshold. This sensitivity can be degraded by increasing the excited-to-ground-state energy separation, which results in a high excited-to-ground-state threshold ratio. In addition, the occurrence of excited state lasing decreases the damping factor and increases the linewidth enhancement factor, which leads to a low critical feedback level. These findings illuminate a path to fabricate reflection-insensitive quantum dot lasers for isolator-free photonic integrated circuits.

Original languageEnglish
JournalPhotonics Research
Volume11
Issue number10
Pages (from-to)1713-1722
ISSN2327-9125
DOIs
Publication statusPublished - Oct 2023

Bibliographical note

Funding Information:
National Key Research and Development Program of China (2022YFB2803600); National Natural Science Foundation of China (62204072, U22A2093); Basic and Applied Basic Research Foundation of Guangdong Province (2021A1515110076, 2023A1515012304); Shenzhen Science and Technology Innovation Program (GXWD20220811163623002, RCBS20210609103824050). We acknowledge Professor Dieter Bimberg from Technische Universität Berlin, Germany, and Changchun Institute of Optics, Fine Mechanics and Physics, Chinese Academy of Sciences, China, for providing the high-quality QD laser sample.

Funding Information:
Funding. National Key Research and Development Program of China (2022YFB2803600); National Natural Science Foundation of China (62204072, U22A2093); Basic and Applied Basic Research Foundation of Guangdong Province (2021A1515110076, 2023A1515012304); Shenzhen Science and Technology Innovation Program (GXWD20220811163623002, RCBS20210609103824050).

Publisher Copyright:
© 2023 Chinese Laser Press.

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