A low-power GaAs-based monolithically integrated phototransceiver, consisting of a high-gain heterojunction phototransistor (HPT) and a microcavity light-emitting diode (MCLED) or a low-threshold vertical-cavity surface-emitting laser (VCSEL), is demonstrated. The HPT and MCLED/VCSEL are grown by molecular-beam epitaxy in a single step. The phototransistor exhibits a responsivity of 60A/W at an...

1. Introduction The key part of the optical network module that we are proposingg1],2] is a two dimensional optical element consisted of the vertical cavity surface-emitting laser (VCSEL) arrays and the switching devices with optical lter. In this paper, we report on a study of the fabrication technologies of a distributed Bragg reeector (DBR) for VCSEL and optical lter for the switching device...

Introduction: Two-dimensional (2D)-phased vertical cavity surface-emitting laser (VCSEL) arrays offer unique advantages for scaling up single-mode power for high-brightness applications such as fibre laser pumps. They tend, however, to operate in the undesirable out-of-phase mode, which has an on-axis null in the far field [1]. In-phase VCSEL arrays with an on-axis maximum in the far field have...

We report angle dependent and temperature dependent (9 K–300 K) photo-modulated reflectance (PR) studies on vertical-cavity surface-emitting laser (VCSEL) structures, designed for 2.3 lm mid-infrared gas sensing applications. Changing the temperature allows us to tune the energies of the quantum well (QW) transitions relative to the VCSEL cavity mode (CM) energy. These studies show that this VC...

We report on the modulation responses of an injection-locked vertical-cavity surface-emitting laser (VCSEL) measured using optical spin-polarization technique. reveal that weak injection locking is suitable to maintain a strong resonance response at high-frequency region depending linear birefringence VCSEL, unique feature response. The results can be reasonably reproduced with simulated ones b...

Surface-emitting lasers with an external cavity delivering a diffraction-limited beam have shown the potential to outperform edge-emitting devices in applications demanding high brightness (emitted intensity per unit solid angle), like pumping of doped fiber amplifiers or frequency doubling [1]–[3]. Due to the large mode size, the VECSEL concept is powerscalable by expanding the pumped area and...

KANJ, HOUSSAM. Circuit-Level Modeling of Laser Diodes. (Under the direction of Dr. Michael B. Steer.) In all semiconductor laser diodes the thermal, electrical, and optical characteristics are integrally related. In this work, a new approach to the modeling of laser diodes that integrates electrical, optical and thermal effects is presented. Also, it is demonstrated how physical device models b...

Planar microcavities with distributed Bragg reflectors (DBRs) host, besides confined optical modes, also mechanical resonances due to stop bands in the phonon dispersion relation of the DBRs. These resonances have frequencies in the 10- to 100-GHz range, depending on the resonator's optical wavelength, with quality factors exceeding 1,000. The interaction of photons and phonons in such optomech...

In this paper we report on a laser range finding system built using the self-mixing effect in a Vertical-Cavity Surface-Emitting Laser (VCSEL). The distance to the target in these range finders is usually calculated by determining the time interval between the peaks in the resulting power fluctuations that are produced by the selfmixing effect. In this study we propose the use of a method that ...

Since the commercialization of Vertical Cavity Surface Emitting Lasers (VCSELs) in 1996, Finisar’s Advanced Optical Components Division has shipped well over 50 Million VCSELs. The vast majority of these were shipped into the data communications industry, which was essentially the only volume application until 2005. The driver for VCSEL manufacturing might well shift to the increasingly popular...