Two-Section Quantum-Dot Mode-Locked Lasers Under Optical Feedback: Pulse Broadening and Harmonic Operation

Author

Simos, Hercules ; Simos, Christos ; Mesaritakis, Charis ; Syvridis, Dimitris

Author_Institution

Dept. of Inf. & Telecommun., Nat. & Kapodistrian Univ. of Athens, Athens, Greece

Volume

48

Issue

7

fYear

2012

fDate

7/1/2012 12:00:00 AM

Firstpage

872

Lastpage

877

Abstract

In this paper, we numerically investigate the role of gain and absorber dynamics on the operation of monolithic two-section mode-locked quantum-dot lasers under optical feedback. The analysis is carried out by means of a time-domain traveling wave model for propagation in the gain and absorbing sections. The obtained results indicate that in devices with slow dynamics, pulse duration tends to increase significantly with feedback. On the contrary, devices with fast dynamics exhibit an operation that depends primarily on the external cavity length.

Keywords

laser beams; laser cavity resonators; laser feedback; laser mode locking; light propagation; optical saturable absorption; quantum dot lasers; absorber dynamics; external cavity length; fast dynamics; gain dynamics; harmonic operation; light propagation; monolithic two-section quantum-dot mode-locked lasers; optical feedback; pulse broadening; pulse duration; slow dynamics; time-domain traveling wave model; Cavity resonators; Gain; Laser feedback; Laser mode locking; Laser theory; Optical feedback; Quantum dot lasers; Mode-locking; optical feedback; quantum-dot laser; semiconductor lasers;

fLanguage

English

Journal_Title

Quantum Electronics, IEEE Journal of

Publisher

ieee

ISSN

0018-9197

Type

jour

DOI

10.1109/JQE.2012.2193387

Filename

6178003