Title :
A guided-wave optical electric field sensor with improved temperature stability
Author :
Ogawa, Osamu ; Sowa, Tomohiro ; Ichizono, Shinichi
Author_Institution :
Comput. & Commun. R&D Centre, Tokyo Electr. Power Co., Japan
fDate :
5/1/1999 12:00:00 AM
Abstract :
This paper reports on the study of an electric field sensor based on the Y-cut LiNbO3 waveguide which has slight temperature dependence. The errors in the electric field measurements due to temperature variations were theoretically studied and the increase in the error with a temperature change of 100 K has been proven to be extremely low, 2.5%. As a technology to achieve high temperature stability, we adopted a new method of attaching optical fibers to a waveguide and a method of suppressing the pyroelectric effect by depositing (ITO) In2O3-SnO3 films onto the Z-faces. The temperature dependence of the fabricated sensor was measured and it was found that the measurement errors in a broad temperature range from -30 to 90°C was ±7% or less
Keywords :
electric field measurement; indium compounds; measurement errors; optical films; optical sensors; optical waveguides; thermal stability; tin compounds; -30 to 90 C; In2O3-SnO3; In2O3/SnO3 films; LiNbO3; Y-cut LiNbO3 waveguide; Z-faces; broad temperature range; electric field measurements; guided-wave optical electric field sensor; high temperature stability; improved temperature stability; measurement errors; pyroelectric effect; slight temperature dependence; temperature change; temperature variations; Electric variables measurement; Optical films; Optical sensors; Optical waveguide theory; Optical waveguides; Stability; Temperature dependence; Temperature measurement; Temperature sensors; Ultraviolet sources;
Journal_Title :
Lightwave Technology, Journal of
