Wednesday, November 28, 2012

Abstract-Terahertz-bandwidth coherence measurements of a quantum dash laser in passive and active mode-locking operation


Eamonn Martin, Regan Watts, Laurent Bramerie, Alexandre Shen, Harry Gariah, Fabrice Blache, Francois Lelarge, and Liam Barry

http://www.opticsinfobase.org/ol/abstract.cfm?uri=ol-37-23-4967

This research carries out coherence measurements of a 42.7 GHz quantum dash (QDash) semiconductor laser when passively, electrically, and optically mode-locked. Coherence of the spectral lines from the mode-locked laser is determined by examining the radio frequency beat-tone linewidth as the mode spacing is increased up to 1.1 THz. Electric-field measurements of the QDash laser are also presented, from which a comparison between experimental results and accepted theory for coherence in passively mode-locked lasers has been performed.

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