Optically Injected Single-Mode Quantum Dot Lasers

Abstract

The response of an optically injected quantum dot semiconductor laser is studied both experimentally and theoretically. Specifically, the locking boundaries are investigated, revealing features more commonly associated with Class A lasers rather than conventional Class B semiconductor lasers (SLs). Further, various dynamical regimes are observed including excitability and multistability. Of particular interest is the observation of a phase-locked bistability. We determine the stability diagram analytically using appropriate rate equations for quantum dot lasers. In particular, the saddle-node (SN) and Hopf bifurcations forming the locking boundaries are examined and are shown to reproduce the observed experimental stability features. The generation of the phase-locked bistability is also explained via a combination of these bifurcations.

Bistability patterns and nonlinear switching with very high contrast ratio in a 1550 nm quantum dash semiconductor laser

“…[21][22][23][24] However, the study of OB and NS in nanostructure lasers has not yet attracted much attention despite their theoretically superior properties. Devices made using advanced QDot or QDash active regions offer many potential advantages including ultrafast carrier dynamics, 25 reduced linewidth enhancement factor (a), 26 and low temperature dependence of the threshold current.…”

Nonlinear dynamics of an injected quantum cascade laser

“…The stability diagram of an injected QC laser bears striking analogies with the one of a QD laser when the latter admits strongly damped relaxation oscillations [6,7]. However, the values of the parameters appearing in the rate equations for QD lasers are not as well documented as for QC lasers.…”

“…Motivated by recent work on injected locked quantum dot lasers [6,7], Eqs. (18)- (20) were recently analyzed by Kelleher et al [24] We now propose to analyze the linear stability of the steady state.…”

“…[3] for a review). More recently, the injection locking properties of vertical-cavity-surface emitting lasers [4], two-color (twomode) lasers [5], and quantum-dot (QD) lasers [6,7] have been explored experimentally.…”

Dual state antiphase excitability in optically injected quantum dot lasers

“…The behavior of such devices while emitting from the GS only has been well investigated in recent years and studies of the behavior under optical injection have revealed many interesting phenomena. [1][2][3] While studies of optically injected QD lasers in the two-state or the ES only regimes are much more rare, interest in these regimes has recently grown. Of note for this work is the ultrafast all-optical switching between the GS and ES obtained in.…”