Ge/Si separate absorption, charge, and multiplication avalanche photodiodes (SACM APDs) coupled with waveguides have shown significant potential as high-sensitivity, low-noise, high-speed photodetectors for optical communications. In this study, we present a waveguide-integrated SACM APD fabricated on an eight-inch silicon photonics platform. The device exhibits primary responsivity of 0.68 A/W...

Abstract This paper reports the implementation of two critical technologies used in LiDARs: 1) A microchip Q-switched laser breadboard and 2) an Indium gallium arsenide avalanche photodiode working at 300 K with high reverse polarization voltages. Microchip lasers are small solid state back pumped lasers, that can generate energy short pulses. The implemented Erbium Ytterbium co doped phosphate...

Avalanche photodiodes (APDs) made with the material AlGaAsSb (lattice-matched to InP) exhibit very low excess noise characteristics. We demonstrate a Separate Absorption and Multiplication APD (SAM-APD) incorporating GaAs 0.52 Sb xmlns:xlink="http://www.w3.org/1999/xlink">0.48 (GaAsSb) abs...

Mid-wavelength infrared (MWIR) detection is useful in a variety of scientific and military applications. Avalanche photodiodes can provide an advantage for as their internal gain mechanism increase the system signal-to-noise ratio receiver. We demonstrate separate absorption, charge, multiplication avalanche photodiode using digitally grown narrow-bandgap Al 0.05 InAsSb absorber MWIR wide bandg...

This paper reports the implementation of two critical technologies used in light detection and ranging for space applications: (1) a microchip Q-switched laser breadboard; (2) breadboard an indium gallium arsenide avalanche photodiode working at 292 K with high reverse polarization voltages. Microchip lasers are small solid-state back-pumped that can generate high-energy short pulses. The imple...

This work considers the use of a freeform total internal reflection (TIR) lens for optical concentration and provides first time experimental results in context wireless communications (OWC). The is placed on surface-mounted device (SMD) avalanche photodiode (APD) to minimize position tolerances simplify assembly. achieves ratio go = 44.7 (16.5 dB) within FOV center exhibits an acceptance angle...

Abstract The intensity fluctuation of atmospheric turbulence significantly affects the performance laser communication system. To suppress effect, we propose an avalanche photodiode (APD) optimal gain formula under channel, taking real-time received signal-to-noise ratio (SNR) as evaluation parameter channel’s state. Based on this formula, design a model optical signal receiver in utilizing Fuz...