Skip to main content
U.S. flag

An official website of the United States government

Official websites use .gov
A .gov website belongs to an official government organization in the United States.

Secure .gov websites use HTTPS
A lock ( ) or https:// means you’ve safely connected to the .gov website. Share sensitive information only on official, secure websites.

Dark Pulse Formation in a Quantum Dot Laser



Jonathan Zimmerman, Steven T. Cundiff, G von Plessen, J Feldmann, M Arzberger, J Bohm, M C. Amann, G Abstreiter


The laser emission of an InAS/GaAs quantum dot laser after injection of a non-resonant optical pulse is time resolved using femtosecond upconversion. The injected pulse burns a spectral hole into the gain spectrum that leads to an ultrafast redistribution of carriers away from the lasing wavelength, thereby generating a spatial domain of reduced laser intensity. This domain propagates through the laser, is reflected at the facets, and thus repeats periodically in the output of the quantum dot laser, forming a train of dark pulses. As a slower response to the optically induced perturbation, gigahertz-frequency relaxation oscillations are observed.
Applied Physics Letters


laser, quantum dot, semiconductor, ultrafast


Zimmerman, J. , Cundiff, S. , von Plessen, G. , Feldmann, J. , Arzberger, M. , Bohm, J. , Amann, M. and Abstreiter, G. (2001), Dark Pulse Formation in a Quantum Dot Laser, Applied Physics Letters (Accessed June 12, 2024)


If you have any questions about this publication or are having problems accessing it, please contact

Created June 30, 2001, Updated October 12, 2021