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Updated: May 8, 2026

Development of Whispering Gallery Mode Polymeric Micro-optical Electric Field Sensors
Published on: January 29, 2013
Improvements in electric-field sensor sensitivity by exploiting a tangential field condition
Spencer Chadderdon1, Leeland Woodard, Daniel Perry
1Department of Electrical and Computer Engineering, Brigham Young University, Provo, Utah 84602, USA.
Abstract:
This paper presents improvements to slab-coupled optical fiber sensors for electric-field sensing. The sensors are comprised of a potassium titanyl phosphate (KTP) crystal mounted on a D-fiber. The improvements are based on changing the crystal orientation, which enhances sensitivity due to a combined increase in the effective electro-optic coefficient and electric-field penetration into the KTP crystal. The paper provides a detailed comparison of the improved sensor, which uses x-cut KTP to the previous sensor design using z-cut KTP. The measurements show an 8.6× improvement in the sensitivity.
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