27 Channels, 1 MHz Fibre-Optic Measuring System (Een 27-Kannaals, 1 MHz OptischMeetsysteem)

摘要

The Kapitza facility is a pulse forming network consisting of an energy source,semiconductor opening switch, pulse transformer and a load. To characterize the Kapitza facility, there is a need for a measurement system where the sensors are completely separated electrically from the Data Acquisition System. A measurement system based upon fiber-optic data transmission was finally chosen. This fiber-optic system, with a bandwidth of 1 MHz, uses FM transmission techniques; the data input is used to frequency modulate the optical carrier that is coupled to the fiber, and subsequently demodulated at the receiver to recover the analog signal. In this report the operation of the optical measurement system, the components that have been used and the calibration of the transmitter/receiver units are some of the subjects that are discussed. In the appendix, schematics, print layouts, lists with the used components, wave forms of the input output signals and specifications are given.