Theory of Self-pulsing in Photonic Crystal Fano Lasers

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Abstract

Laser self-pulsing was a phenomenon exclusive to macroscopic lasers until recently, where self-starting laser pulsation in a microscopic photonic crystal Fano laser was reported. In this paper a theoretical model is developed to describe the Fano laser, including descriptions of the highly-dispersive Fano mirror, the laser frequency and the threshold gain. The model is based upon a combination of conventional laser rate equations and coupled-mode theory. The dynamical model is used to demonstrate how the laser has two regimes of operation, continuous-wave output and self-pulsing, and these regimes are characterised using phase diagrams, establishing the regime of self-pulsing numerically. Furthermore, the physics behind the self-pulsing mechanism are explained in detail and it is demonstrated how cavity absorption makes the Fano mirror function as a saturable absorber, leading to Q-switched pulse generation. A stability analysis is used to demonstrate how the dominant mechanism of instability is relaxation oscillations becoming un-damped. Finally the effect of varying key self-pulsing parameters is investigated by characterisation of the change in self-pulsing regions.
Original languageEnglish
Article number1700089
JournalLaser & Photonics Reviews
Volume11
Issue number5
Number of pages13
ISSN1863-8880
DOIs
Publication statusPublished - 2017

Cite this

@article{1acf167b598c4a71ac27af7e44836797,
title = "Theory of Self-pulsing in Photonic Crystal Fano Lasers",
abstract = "Laser self-pulsing was a phenomenon exclusive to macroscopic lasers until recently, where self-starting laser pulsation in a microscopic photonic crystal Fano laser was reported. In this paper a theoretical model is developed to describe the Fano laser, including descriptions of the highly-dispersive Fano mirror, the laser frequency and the threshold gain. The model is based upon a combination of conventional laser rate equations and coupled-mode theory. The dynamical model is used to demonstrate how the laser has two regimes of operation, continuous-wave output and self-pulsing, and these regimes are characterised using phase diagrams, establishing the regime of self-pulsing numerically. Furthermore, the physics behind the self-pulsing mechanism are explained in detail and it is demonstrated how cavity absorption makes the Fano mirror function as a saturable absorber, leading to Q-switched pulse generation. A stability analysis is used to demonstrate how the dominant mechanism of instability is relaxation oscillations becoming un-damped. Finally the effect of varying key self-pulsing parameters is investigated by characterisation of the change in self-pulsing regions.",
author = "Rasmussen, {Thorsten Svend} and Yi Yu and Jesper M{\o}rk",
year = "2017",
doi = "10.1002/lpor.201700089",
language = "English",
volume = "11",
journal = "Laser & Photonics Reviews",
issn = "1863-8880",
publisher = "Wiley - V C H Verlag GmbH & Co. KGaA",
number = "5",

}

Theory of Self-pulsing in Photonic Crystal Fano Lasers. / Rasmussen, Thorsten Svend; Yu, Yi; Mørk, Jesper.

In: Laser & Photonics Reviews, Vol. 11, No. 5, 1700089, 2017.

Research output: Contribution to journalJournal articleResearchpeer-review

TY - JOUR

T1 - Theory of Self-pulsing in Photonic Crystal Fano Lasers

AU - Rasmussen, Thorsten Svend

AU - Yu, Yi

AU - Mørk, Jesper

PY - 2017

Y1 - 2017

N2 - Laser self-pulsing was a phenomenon exclusive to macroscopic lasers until recently, where self-starting laser pulsation in a microscopic photonic crystal Fano laser was reported. In this paper a theoretical model is developed to describe the Fano laser, including descriptions of the highly-dispersive Fano mirror, the laser frequency and the threshold gain. The model is based upon a combination of conventional laser rate equations and coupled-mode theory. The dynamical model is used to demonstrate how the laser has two regimes of operation, continuous-wave output and self-pulsing, and these regimes are characterised using phase diagrams, establishing the regime of self-pulsing numerically. Furthermore, the physics behind the self-pulsing mechanism are explained in detail and it is demonstrated how cavity absorption makes the Fano mirror function as a saturable absorber, leading to Q-switched pulse generation. A stability analysis is used to demonstrate how the dominant mechanism of instability is relaxation oscillations becoming un-damped. Finally the effect of varying key self-pulsing parameters is investigated by characterisation of the change in self-pulsing regions.

AB - Laser self-pulsing was a phenomenon exclusive to macroscopic lasers until recently, where self-starting laser pulsation in a microscopic photonic crystal Fano laser was reported. In this paper a theoretical model is developed to describe the Fano laser, including descriptions of the highly-dispersive Fano mirror, the laser frequency and the threshold gain. The model is based upon a combination of conventional laser rate equations and coupled-mode theory. The dynamical model is used to demonstrate how the laser has two regimes of operation, continuous-wave output and self-pulsing, and these regimes are characterised using phase diagrams, establishing the regime of self-pulsing numerically. Furthermore, the physics behind the self-pulsing mechanism are explained in detail and it is demonstrated how cavity absorption makes the Fano mirror function as a saturable absorber, leading to Q-switched pulse generation. A stability analysis is used to demonstrate how the dominant mechanism of instability is relaxation oscillations becoming un-damped. Finally the effect of varying key self-pulsing parameters is investigated by characterisation of the change in self-pulsing regions.

U2 - 10.1002/lpor.201700089

DO - 10.1002/lpor.201700089

M3 - Journal article

VL - 11

JO - Laser & Photonics Reviews

JF - Laser & Photonics Reviews

SN - 1863-8880

IS - 5

M1 - 1700089

ER -