Degradation of the frequency response of photodiodes in measurements of strong optical signals
Gastón Arrigo, P.A. Sorichetti, E. Acosta · DOAJ (DOAJ: Directory of Open Access Journals) · 2017
In this paper we present measurements that reveal changes in the frequency response of a PIN-type photodetector with the increase of the intensity of the light reaching the detector. In particular, two effects are observed at high illumination levels: the bandwidth of the detector decreases and the phase response is modified. For low intensities the bandwidth follows a power law with exponent -1 with the average current of the photodetector, but at high illumination the exponent tends to -0.5.