Visible-light-emitting GaAlAs TS Lasers with Low Threshold Current

Low Threshold Current Density and High Efficiency Surface-Emitting Lasers with a Periodic Gain Active Structure

Low current density, inverted polarity, high-speed, top-emitting 850 nm vertical-cavity surface-emitting lasers

High-speed, oxide-confined, inverted polarity (n-up), polyimide-planarised 850 nm vertical-cavity surface-emitting lasers (VCSELs) were fabricated and characterised. The lasers exhibit a 23 dB frequency modulation bandwidth ( f3dB) up to 15.2 GHz with a 10 mm oxide aperture diameter, at the lowest current density (Jbias) ever reported of 6.4 kA/cm . The ratio f3dB 2 /Jbias 1⁄4 36.1 (GHz/kA/cm) ...

Measurement of optical mode loss in visible emitting lasers

Improving the Efficiency and Threshold Current of Photonic Crystal Vertical - Cavity Surface - Emitting Lasers

Indoor positioning algorithm using light- emitting diode visible light communications

This paper proposes a novel indoor positioning algorithm using visible light communications (VLC). The algorithm is implemented by preinstalled light-emitting diode illumination systems. It recovers the VLC channel features from illuminating visible light and estimates receiver locations by analytically solving the Lambertian transmission equation group. According to our research, the algorithm...