Radio-frequency analysis of self-mode-locked quantum dot laser. (2019)

• Record Type: Journal Article
• Authors: Weber, Christoph; Bardella, Paolo; Columbo, Lorenzo; Gioannini, Mariangela; Breuer, Stefan
• Is Part Of: Materials today. Volume 7:Part 3(2019)
• Page Start: 908
• Page End: 911
• Publication Date: 2019
• Subjects: Self mode-locking -- semiconductor laser -- quantum-dot laser -- relative intensity noise -- radio-frequency linewidth; Materials science -- Congresses -- Periodicals; 620.1
• DOI: 10.1016/j.matpr.2018.12.092
• Languages: English
• ISSNs: 2214-7853

Abstract

Abstract: We numerically study and confirm experimentally a transition from unlocked multi-modal emission to self-mode-locked emission of a single-section InAs/InGaAs quantum dot laser in dependence on the laser injection current. At this transition, the radio-frequency beat note linewidth as well as the modal power fluctuations quantified by an integrated relative intensity noise of all modes are found to be significantly reduced. A linewidth reduction from several hundreds of MHz to below 1 MHz is observed, with the lowest value observed being as small as 20 kHz. Experiment and simulation results are in good qualitative and quantitative agreement