Harmonic mode-locking using the double interval technique in quantum dot lasers.
Passive harmonic mode-locking in a quantum dot laser is realized using the double interval technique, which uses two separate absorbers to stimulate a specific higher-order repetition rate compared to the fundamental. Operating alone these absorbers would otherwise reinforce lower harmonic frequencies, but by operating together they produce the harmonic corresponding to their least common multiple. Mode-locking at a nominal 60 GHz repetition rate, which is the 10(th) harmonic of the fundamental frequency of the device, is achieved unambiguously despite the constraint of a uniformly-segmented, multi-section device layout. The diversity of repetition rates available with this method is also discussed.
Li
Yan
Y
Center for High Technology Materials, The University of New Mexico, 1313 Goddard SE, Albuquerque, NM 87106, USA. yanli@chtm.unm.edu
Chiragh
Furqan L
FL
Xin
Yong-Chun
YC
Lin
Chang-Yi
CY
Kim
Junghoon
J
Christodoulou
Christos G
CG
Lester
Luke F
LF