Simulation and analysis of a Single Mode Indium Gallium Arsenide Phosphide Vertical Cavity Surface Emitting Laser for Optical Communication

This present work is about simulating and analysing a Vertical Cavity Surface Emitting Laser (VCSEL) structure used in optical fibre communication systems. In this paper a VCSEL structure made of seven Quantum Wells of Indium Gallium Arsenide Phosphide (InGaAsP) emitting at 1550 nm is simulated. The device is analysed looking at the following characteristics: Direct current current and voltage (IV) characteristics, light power against electrical bias, optical gain against electrical bias, light distribution over the structure, output power and threshold current. Specification of material characteristics, ordinary physical models settings, initial VCSEL biasing, mesh declarations, declaration of laser physical models, their optical and electrical parameters were defined using Atlas syntax. Mirror ratings and quantum wells are the two main parameters that were studied and analysed to come up with structure trends. By determining important device parameters such as proper selection of the emission wavelength and choice of material; a VCSEL with an output power of 9.5 mW was simulated and compared with other structures.

Gallium arsenide phosphide grown by close-spaced vapor transport from mixed powder sources for low-cost III–V photovoltaic and photoelectrochemical devices

Close-spaced vapor transport provides GaAs1−xPx with controlled composition and competitive electronic properties.

Development of a Micro Photoluminescence Measurement System for the Spectrum Inspection of Gallium Arsenide/Gallium Arsenide Phosphide (GaAs/GaAs1-X Px)

This article mainly focuses on the spectrum measurement of the LED semi-conductor material Gallium Arsenide/Gallium Arsenide Phosphide (GaAs/GaAs1-x Px), using Photoluminescence (PL) method, by integrating the optical path design, the mechanism design, the motion control, the image processing, and the positioning technology to accomplish the development of automatic measurement system. The innovative method of micro-photoluminescence (µ-PL) is proposed in the optical path design. A microscope objective was adopted to focus the laser light to a tiny area and by enhancing the strength of laser light unit to increase the sensitivity of the luminescence. In the past, the examination of PL was used to do the image positioning and to collect the luminescence manually in two different platforms. The developed system integrates these two light path systems, PL and image positioning, as one machine. As a result, the image positioning and luminescence measurement can be done in one machine simultaneously, to save manpower and to avoid the manual positioning error.