We present what to our knowledge is a novel optical electric-power-sensing system that uses a cascade of a Faraday cell and a Pockels cell. According to Jones-matrix analysis, the electric-power information is contained in the intensity of the emerging light. An instantaneous ac electric-power signal has been observed in real time, and the active power has been measured in the 0–1-kW range. The experimental results are in good agreement with the theoretical analysis and prove the feasibility of the optical sensing system.
© 2001 Optical Society of America
(060.2370) Fiber optics and optical communications : Fiber optics sensors
(230.2090) Optical devices : Electro-optical devices
(230.2240) Optical devices : Faraday effect
(230.3810) Optical devices : Magneto-optic systems
(260.5430) Physical optics : Polarization
Yongqian Li, Changsheng Li, and Toshihiko Yoshino, "Optical Electric-Power-Sensing System Using Faraday and Pockels Cells," Appl. Opt. 40, 5738-5741 (2001)