Frequency and phase characteristics of a photomultiplier in the regime of the frequency conversion of an optical-signal envelope
Abstract
The paper examines the factors determining the amplitude and phase of the intermediate-frequency current at the output of a photomultiplier in the case of the variation of the modulation frequency of the optical signal in the 0-200 MHz range. The cutoff of the photocurrent, the defocusing of the photoelectron flux, the variation of the gain of the dynode system, and the spread of the transit time of photoelectrons in the cathode chamber are taken into account in obtaining the frequency and phase characteristics in the radio heterodyne regime. Theoretical results are confirmed by experimental data. Nonuniformities in phase distributions along the photocathode are investigated, and the possibility of correcting them is discussed.
- Publication:
-
Radiotekhnika i Elektronika
- Pub Date:
- June 1982
- Bibcode:
- 1982RaEl...27.1203P
- Keywords:
-
- Frequency Response;
- Optical Communication;
- Phase Deviation;
- Photomultiplier Tubes;
- Electric Current;
- Optical Heterodyning;
- Photocathodes;
- Photoelectric Emission;
- Electronics and Electrical Engineering