An analog fiber optic link for ESD detection

Common‐mode rejection ratio characterisation of a broadband electro‐optical differential ESD voltage probe

“…The general concept of electro‐optical probes designed for measuring electrostatic discharges (ESD) is introduced in [1]. Contactless electro‐optical probes are commonly used for measurement of radiated electric and magnetic fields [2].…”

An optoelectronic probe with loss compensation for electromagnetic monitoring at low frequencies

“…Optoelectronic probes are useful or potentially useful in many applications covering the monitoring at low to high electromagnetic frequencies as near-field characterization of antennas [1,4] and high-frequency circuits [6], electromagnetic pollution due to radio and TV-diffusion as well other wireless services [7], interference due to broadband power line (1.7-80 MHz) in radio communications [8], remote link between antennas and AM or HF-band radio devices [9,10], medical treatment for hyperthermia [11], energy transmission lines (50/60 Hz) [12], fast transients from electrostatic discharges (ESD) [13], multiple radio signals in military ships [5], etc.…”

“…Such information is very important, e.g. in the EMC diagnosis when the electromagnetic field amplitude must be tracked and compared with tolerance standard or safety levels depending on monitored frequency [5,7,13].…”

“…Therefore, the measurement results could be changed. Furthermore, such cables are also highly attenuating, radiating and could spread the electromagnetic signals [5,11,13]. Due to their dielectric nature, optical fibres can avoid EMI when used as a telemetry link, thus allowing safer and more reliable measurements.…”