Dynamic modal analysis of monolithic mode-locked semiconductor lasers

We analyze the advantages and applicability limits of the mode-coupling approach to active, passive, hybrid, and harmonic mode-locking in diode lasers. A simple, computationally efficient numerical model is proposed and applied to several traditional and advanced laser constructions and regimes, including high-frequency pulse emission by symmetric and asymmetric colliding pulse mode-locking, and locking properties of hybrid modelocked Fabry–Perot and distributed Bragg reflector lasers

Asymmetric, nonbroadened large optical cavity waveguide structures for high-power long-wavelength semiconductor lasers

We present a simple semianalytical model for evaluating the free-carrier loss in the waveguide layer of large-cavity semiconductor lasers, which proves that these losses may become an important factor at high bias currents. It is shown that nonbroadened asymmetric waveguide structures can significantly reduce these losses when compared to broadened symmetric waveguides, with little or no degradation in threshold, near- and far-field properties, and are thus a promising configuration for high-power lasers operating high above threshold

Analysis of dynamics of monolithic passively mode-locked laser diodes under external periodic excitation

A distributed time-domain model is used for numerical analysis of the dynamics of a passively mode-locked laser diode under external modulation at a frequency close to the round-trip frequency of the laser. Dynamical regimes of the laser, such as synchronisation locking, quasilocking and RF frequency mixing, are studied. For the locked regime, steady-state parameters are defined, the crucial role of group-velocity dispersion in achieving locking is demonstrated and stages of the locking dynamics and corresponding time constants are identified

Monolithic and multi-GigaHertz mode-locked semiconductor lasers: constructions, experiments, models and applications

Progress in technology, theory and applications of high-frequency mode-locked diode lasers is reviewed. We present a systematic overview of a wealth of experimental and theoretical results and approaches reported recently in the field of physics, technology and applications of monolithic mode-locked laser diodes

Mode-locked diode lasers for microwave optoelectronic applications

The paper reviews the recent progress in technology, theory and applications of diode lasers mode locked at microwave frequencies

Miscibility gap of ternary alloys of binary compounds with zinc-blende and wurtzite structures using the cluster variation method

The miscibility gap of the AxB1 − xC ternary alloys is described using the cluster variation method with a tetrahedron as the basic cluster. The maximum temperature of the boundary of miscibility gap is Tt = 0.835α/2R. It is shown that the miscibility gaps of AxB1 − xC ternary alloys with zinc-blende and wurtzite structures coincide in the approximation used

Longitudinal mode grouping in InGaAs/GaAs/AlGaAs quantum dot lasers: origin and means of control

It is proposed that the recently observed quasi-periodic modulation of the emission spectra of quantum dot lasers is due to interference effects associated with waveguide leakage into the substrate. Such effects could be positively engineered to control laser spectra in such devices

Engineering quantum-dot lasers

We discuss recent progress in the engineering of quantum-dot (QD) lasers, focusing on the spectral output, dynamics and techniques for integration. Two approaches to such engineering are discussed. Firstly, it is suggested that control of lasing spectra in QD lasers is possible by making use of waveguiding-related phenomena (substrate leakage and reflection) which, in unoptimised laser structures, result in the mode grouping effect (quasiperiodic spectral modulation). Secondly, first experimental studies of quantum dot intermixing are reported, suggesting that this technique is capable of both improving the performance of active QD media and integrating active QD sections with passive waveguides