High-performance small vertical-cavity lasers: a comparison of measured improvements in optical and current confinement in devices using tapered apertures

The authors analyze the scaling characteristics of the optical and current confinement for three different vertical-cavity surface-emitting laser (VCSEL) structures with tapered apertures. The improvements in scaling have allowed devices with apertures =150 micro W. The combination of low threshold

High-performance small vertical-cavity lasers: a comparison of measured improvements in optical and current confinement in devices using tapered apertures

The authors analyze the scaling characteristics of the optical and current confinement for three different vertical-cavity surface-emitting laser (VCSEL) structures with tapered apertures. The improvements in scaling have allowed devices with apertures =150 micro W. The combination of low threshold

Multiple-wavelength vertical-cavity laser arrays based on postgrowth lateral-vertical oxidation of AlGaAs

We demonstrate that combined lateral-vertical oxidn. of AlGaAs can be used to change the resonant wavelength of an optical cavity after the single epitaxial growth. A multiple-wavelength array of vertical-cavity surface-emitting lasers with a 48 nm wavelength span was realized using this technique. [on SciFinder (R)

Postgrowth tuning of semiconductor vertical cavities for multiple-wavelength laser arrays

Combined lateral-vertical oxidn. of AlGaAs was investigated as a means of tuning the resonant wavelength of a semiconductor microcavity after epitaxial growth. This technique can provide arrays with a wavelength spread equal to the cavity's free spectral range with a single postgrowth processing step. Design issues for multiple-wavelength vertical-cavity laser arrays using this postgrowth tuning technique are discussed, comparing the performance of devices with all-semiconductor and partially or totally oxidized Bragg mirrors. Exptl. results are presented on arrays with a 48-nm lasing span around 970 nm, using partially and totally oxidized mirrors. [on SciFinder (R)

Low-threshold multiple-wavelength vertical-cavity laser arrays obtained by post-growth wet oxidation

A mask-defined array of multiple-wavelength vertical-cavity surface-emitting lasers with sub-milliamp threshold currents over a 22. nm wavelength span was fabricated with a single epitaxial growth on a conventional substrate. Tuning is achieved by using the combination of lateral and vertical wet oxidn. of an AlGaAs layer inside the cavity. [on SciFinder (R)