Berlin 2018 – scientific programme
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HL: Fachverband Halbleiterphysik
HL 13: Poster Session I
HL 13.77: Poster
Monday, March 12, 2018, 17:30–19:30, Poster B
Radio-frequency studies of self-mode-locking in a single-section quantum dot laser: experiment and simulation — •Christoph Weber1, Paolo Bardella2, Lorenzo Luigi Columbo2, Mariangela Gioannini2, and Stefan Breuer1 — 1Institut für angewandte Physik, Technische Universität Darmstadt, Schlossgartenstraße 7, 64289 Darmstadt, Germany — 2Dipartimento di Elettronica e Telecomunicazioni, Politecnico di Torino, Corso Duca degli Abruzzi 24, 10129 Torino, Italy
Self-mode-locked single-section semiconductor lasers (SCLs) with active gain materials based on quantum wells [1], quantum dashes [2] or quantum dots [3], are compact photonic sources that generate optical frequency combs. We experimentally find and numerically study a transition from unlocked multi-modal emission to self-mode-locked emission of a single-section quantum dot based SCL depending on the injected gain current. This transition is characterized by a significantly reduced beat note line-width in the radio-frequency spectrum and a reduction of the integrated relative intensity noise. Experiments and simulations are in good qualitative and quantitative agreement. [1] Sato et al., Electron. Lett. 37 (2001),763. [2] Panapakkam et al., IEEE J. Quantum Electron. 52 (2016),1. [3] Liu et al., Opt. Letts. 33 (2008), 1702. [4] Bardella et al., Opt. Express 25 (2017), 26234.