On-demand Q-switching regime in optically injected dual-section quantum-dot laser

Ana Ribeiro; Adam Fredeerick Forrest; Maria Ana Cataluna

doi:10.1109/JPHOT.2022.3171087

On-demand Q-switching regime in optically injected dual-section quantum-dot laser

Ana Ribeiro, Adam Fredeerick Forrest, Maria Ana Cataluna

Research output: Contribution to journal › Article › peer-review

1 Citation (Scopus)

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Abstract

Pure Q-switching (self-pulsating) behaviour is shown for the first time in an optically injected two-section quantum-dot laser. Upon CW optical injection, it was possible to switch the operation regime from free-running mode-locking to locked Q-switching. Under this regime, the pulse repetition rate of around 1 GHz was tunable with injection power (by more than 100 MHz) and absorber reverse bias. Moreover, through injection-locking, the Q-switched output was spectrally tunable by around 7 nm, by tuning the master laser. The seamless switch between mode-locking and Q-switching with optical injection as well as the tunability and control afforded by injection-locking could open up a range of applications, such as in multi-modal imaging. On a more fundamental level, this investigation has also generated new insights into the dynamics of quantum-dot lasers and the optical injection process.

Original language	English
Article number	1529605
Journal	IEEE Photonics Journal
Volume	14
Issue number	3
Early online date	28 Apr 2022
DOIs	https://doi.org/10.1109/JPHOT.2022.3171087
Publication status	Published - Jun 2022

Keywords

Laser mode locking
laser tuning
optical tuning
quantum dot lasers
semiconductor lasers
ultrafast optics

ASJC Scopus subject areas

Atomic and Molecular Physics, and Optics
Electrical and Electronic Engineering

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title = "On-demand Q-switching regime in optically injected dual-section quantum-dot laser",

abstract = "Pure Q-switching (self-pulsating) behaviour is shown for the first time in an optically injected two-section quantum-dot laser. Upon CW optical injection, it was possible to switch the operation regime from free-running mode-locking to locked Q-switching. Under this regime, the pulse repetition rate of around 1 GHz was tunable with injection power (by more than 100 MHz) and absorber reverse bias. Moreover, through injection-locking, the Q-switched output was spectrally tunable by around 7 nm, by tuning the master laser. The seamless switch between mode-locking and Q-switching with optical injection as well as the tunability and control afforded by injection-locking could open up a range of applications, such as in multi-modal imaging. On a more fundamental level, this investigation has also generated new insights into the dynamics of quantum-dot lasers and the optical injection process.",

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On-demand Q-switching regime in optically injected dual-section quantum-dot laser

Abstract

Keywords

ASJC Scopus subject areas

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