The extra differential gain enhancement in multiple-quantum-well lasers

Differential gain in InP-based strained layer multiple quantum well lasers

Compressive biaxial strain has been predicted to enhance the small-signal modulation bandwidth of quantum well lasers, owing to increased differential gain in these devices. However, the effect of tensile strain on these devices is less clear. We have investigated the effects of both compressive and tensile strain on the differential gain for multiple quantum well lasers with In,Ga,-As quantum ...

Gain Optimization in Optically Pumped AlGaAs Unipolar Quantum-Well Lasers

A method is described for the optimized design of quantum-well (QW) structures, in respect to maximizing the stimulated gain in optically pumped intersubband lasers. It relies on applying supersymmetric quantum mechanics (SUSYQM) to an initial Hamiltonian, in order to both map one bound state below the spectral range of the initial Hamiltonian, and to generate a parameter-controlled family of i...

Differential gain and damping factor in strained InGaAs/GaAs quantum well lasers

The differential gain, modulation response, and damping rate of strained-layer Ino•3Ga(J•7As multiple quantum well (MQW) short cavity graded-index separate confmement heterostrucutre (GRINSCH) and SCH lasers fabricated by chemically-assisted ion beam etching (CAIBE) are analyzed. Calculated differential gains vary from 0.7 to. 1 .6 x 1015 cm2, with only relatively long lasers of 400 p.m demonst...

Emission wavelength of AlGaAsGaAs multiple quantum well lasers

Chapter 2 Nonlinear Dynamics of Multiple Quantum Well Lasers

Low dimensional structures have come a long way from being mere examples of applied quantum mechanics tv widespread applications in many modem devices and instruments. Quantum well, quantum cascade and quantum dot lasers make use of the very fundamental idea of carrier confinement within dimenswns that match their de Broglie wavelength. Quantum well lasers are used in many modern optoelectronic...