Ayub Fathimulla

Ayub Fathimulla

and Ayub Fathimulla

Stories by Ayub Fathimulla

Linear Avalanche Photodiodes Enable Single Photon Sensors

Single photons are elementary particles that are arguably the most tangible, yet some of the most difficult to detect and characterize as single entities. Techniques to count single photons require optical detectors with linear operation, high gain, wide bandwidth and low noise. This article will describe a variety of approaches to detect and count single photons, the key measurement metrics, and potential applications of single photon sensors.