@InProceedings{Supelec894,
author = {Delphine Wolfersberger and Andreas Karsaklian dal Bosco and Emeric Mercier and Marc Sciamanna},
title = {{Harmonic fundamental self-pulsations from a laser diode using phaseconjugate optical feedback}},
year = {2014},
booktitle = {{Proceeding of SPIE, Semiconductor Lasers and Laser dynamics, Brussels}},
abstract = {Thanks to the band-gap engineering of quantum confined
semiconductor materials and the development of
semiconductor-based saturable absorber mirrors, recent years have
seen the development of compact and low-cost
external-cavity laser diodes generating pulses at several tens of
GHz. The physics of the bifurcation leading to selfpulsation
leads however to an intrinsic limitation: the fundamental
repetition rate is fixed to and limited by the externalcavity
round-trip time. By contrast, we demonstrate here that an
external-cavity diode laser may generate fundamental
self-pulsating dynamics at harmonics of the external-cavity
frequency, when a phase conjugate mirror replaces the
conventional mirror. As is known from theory, a laser diode with
phase conjugate external feedback supports a single
stationary solution that bifurcates to self-pulsating dynamics of
increasing frequency when increasing the amount of light
reflected back to the laser diode. The self-pulsation frequency
then increases in step of the external-cavity frequency as
one increases the feedback strength. We provide here the first
experimental evidence of such harmonic external-cavity
fundamental self-pulsation. As a proof-of-concept, we generate
experimentally a self-pulsating dynamics at twice and
three times the fundamental external-cavity frequency using an
edge-emitting laser with a self-pumped ring-cavity
photorefractive phase conjugator. Numerical simulations also
predict stable higher harmonics.}
}