Martin, E;Watts, R;Bramerie, L;Shen, A;Gariah, H;Blache, F;Lelarge, F;Barry, L

2012

December

Optics Letters

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

Published

7 ()

GHZ

37

4967

4969

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. (C) 2012 Optical Society of America

WASHINGTON

0146-9592