Picture of aircraft jet engine

Strathclyde research that powers aerospace engineering...

The Strathprints institutional repository is a digital archive of University of Strathclyde's Open Access research outputs. Strathprints provides access to thousands of Open Access research papers by University of Strathclyde researchers, including by Strathclyde researchers involved in aerospace engineering and from the Advanced Space Concepts Laboratory - but also other internationally significant research from within the Department of Mechanical & Aerospace Engineering. Discover why Strathclyde is powering international aerospace research...

Strathprints also exposes world leading research from the Faculties of Science, Engineering, Humanities & Social Sciences, and from the Strathclyde Business School.

Discover more...

Time-resolved spectra of a self-pulsing quantum dot laser

Tierno, A. and Radwell, N. and Ackemann, T. (2010) Time-resolved spectra of a self-pulsing quantum dot laser. In: Semiconductor Lasers and Laser Dynamics IV. Proc. SPIE, 7720 . SPIE--The International Society for Optical Engineering., 77202H.

[img]
Preview
PDF (Postprint)
Tierno_ProcSPIE_7720_77202H_2010_QD_selfpulsing.pdf - Accepted Author Manuscript

Download (365kB) | Preview

Abstract

Self-sustained pulsations in the output of an InAs quantum dot laser diode in the MHz range are reported for the first time. The characteristics (shape, range and frequency) are presented for the free running laser and when optical feedback in the Littrow configuration is applied. The frequency resolved optical spectra reveal different envelope shifts between the two cases. This might be related to a change of phase-amplitude coupling across the gain maximum in agreement with the expectation for a two level system. The time scale and bifurcation scenario suggest that these are opto-thermal pulsation like those reported in quantum well amplifiers.(1)