WLI high voltage optical fiber sensor systems with compensation for optical power fluctuations
2007
Two versions of opto-electronic signal processors applied to demodulating the output signal of a White Light
Interferometry (WLI) based optical sensor, designed to measure ac high voltages, are presented. Both processors
incorporate schemes to compensate optical power fluctuations caused by changes of attenuations and losses in
components of the optical fiber sensor systems. The strategy adopted in the first signal processor is based on the precise
detection of the peaks and valleys values present in the output signal of a modulated recover interferometer, which signal
contains desired information about the ac high-voltage applied to a specially designed Pockels cell used as sensor
interferometer. The second signal processor uses a reference sample of the optical power delivered in the output of the
sensor interferometer to normalize the output signal of an unmodulated recover interferometer. Prototypes for both signal
processors were developed and subjected to tests conducted to measure ac high voltages up to 110 kV pp and to verify the
stability of the measurements under conditions of optical power attenuations up to -8.66 dB introduced in the link.
Keywords:
- Correction
- Source
- Cite
- Save
- Machine Reading By IdeaReader
4
References
1
Citations
NaN
KQI