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Showing 1 to 6 of 6 for “"avalanche photodiode (APD)"”.
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Silicon Photomultipliers as Free Space Optical Communication Sensors
… to correct for angular misalignment while an avalanche photodiode (APD) receiver detects the communication signal. The high gain of the APD allows the communication signal to be detected at link distances ranging from 25km to 580km for CLICK-B/C. In this work, we consider whether higher …
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High Capacity VCSEL Array Based Optical Wireless Links
… for each OW channel using a VCSEL array, Avalanche Photodiode (APD) receiver and Orthogonal Frequency-Division Multiplexing (OFDM) modulation scheme. A VCSEL-array-based free space optical (FSO) fronthaul link with easy alignment for next-generation radio access network is demonstrated for …
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Controlling and Understanding Atomic-Scale Dynamics within Plasmonic Nanogaps
… detection of these fast fluctuations, a custom avalanche photodiode (APD) device is built, capable of 10 μs resolution with negligible read noise contribution. Furthermore, superefficient plasmonic nanoarchitectures for Raman kinetics (SPARKs) are implemented and optimised to improve the …
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Novel structures for lattice-mismatched infrared photodetectors
… to very weak signals. In telecoms applications, avalanche photodiode (APD) structures are often used as receivers for long-haul fibre optic systems. However, relatively few avalanche photodiode designs exist for wavelengths beyond 1.55 μm. Two novel separate-absorption-and-multiplication (SAM) …
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Transmission Capacity Improvement for Single Photon Avalanche Diode-based Optical Communication Using PAM Modulation
… links due to the use of single photon avalanche diode (SPAD) optical receivers. Currently, for non-optically amplified optical communication links that use intensity modulation with direct detection, the highest optical sensitivity is achieved using avalanche photodiodes. However, the …
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Development of high-performance front-illumination III-N avalanche photodiodes by metalorganic chemical vapor deposition
Gallium nitride (GaN) avalanche photodiodes (APDs) having large direct band-gap energy of ~3.5 eV at 300K can exhibit a high sensitivity in the ultraviolet (UV). They are appropriate candidates for many applications because of their capability of operation in the near-UV and visible-blind spectral …