Laser action by tuning the oscillator strength

Article Abstract:

A new type of semiconductor laser has been produced which has broad wavelength tunability in the spectrum's mid-infrared area. The laser transition's oscillator strength can be enhanced to achieve the threshold condition for laser action, when the population difference between final and initial laser transition energy levels is held stable. The threshold condition is normally reached when the population difference attains a critical value which involves optical losses and gain.

Product development, Equipment and supplies, Semiconductor lasers, Infrared communications

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Observation of an electronic bound state above a potential well

Article Abstract:

Semiconductor superlattice heterostructures can form a quantum well capable of maintaining bound states of energies above the potential barriers in accordance to predictions based on quantum mechanics. Infrared absorption analysis of such heterostructures formed by molecular-beam epitaxy verified that a narrow, isolated change from a bound state within the quantum well to a bound state with more energy than the barrier height. Bragg reflections can locate this state in space.

Research, Quantum theory, Quantum mechanics, Superlattices as materials, Superlattices, Quantum wells

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Raman injection laser

Article Abstract:

Intersubband transition (IST) is used to theoretically discuss and experimentally observe Raman lasing in GaAs/AlGaAs double quantum wells optically pumped by a Co(sub2) laser. The Raman shift was primarily determined by a photon resonance, anticrossed with an IST.

United States, Observations, Spectra, Optical properties, Raman spectroscopy, Raman effect, Gallium arsenide

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