Be-implanted (GaAl)As stripe geometry lasers

GaAl)As double-heterostructure stripe geometry lasers have been fabricated using Be ion implantation. Pulsed threshold currents as low as 21 mA have been found. The light-vs-current characteristics were kink-free up to 10 mW output power and the measured differential quantum efficiency was 45%

A monolithically integrated optical repeater

A monolithically integrated optical repeater has been fabricated on a single-crystal semi-insulating GaAs substrate. The repeater consists of an optical detector, an electronic amplifier, and a double heterostructure crowding effect laser. The repeater makes use of three metal semiconductor field effect transistors, one of which is used as the optical detector. With light from an external GaAlAs laser incident on the detector, an overall optical power gain of 10 dB from both laser facets was obtained

Low threshold Be implanted (GaAl)As laser on semi-insulating substrate

Be implanted stripe geometry double heterostructure lasers have been fabricated on a semi-insulating GaAs substrate, with threshold currents as low as 15 mA for a cavity length of 100 μm. The laser has been monolithically integrated with a metal-semiconductor field-effect transistor

Observing Christian Faith during the Childhood Years

This paper presents the treasure and cultivate model as a research tool for observing Christian faith in the childhood years. The model seeks to treasure and preserve the natural and innate aspects of a child’s faith and spirituality, whilst simultaneously seeking to develop and cultivate other facets. It is proposed that this balanced approach leads to a childhood faith that is both wholesome and a resource to the child. Observation and logging of a child’s faith in this way provides a tool that allows surveying of characteristics that may influence faith. In the future, this research tool may be used to inform those who seek to foster a child’s religious faith in order that such nurture may be both healthy and resourceful. The paper describes a research project of 61 children aged three to thirteen years old, from six Christian denominations in North West England