標題: Two-dimensional electric-field vector measurement by a LiTaO3 electro-optic probe tip
作者: Kuo, WK
Chen, WH
Huang, YT
Huang, SL
電子工程學系及電子研究所
Department of Electronics Engineering and Institute of Electronics
公開日期: 20-Sep-2000
摘要: An electro-optic probe tip that is made from LiTaO crystal to make tangentially two-dimensional electric-field (E-field) vector measurements is presented. We combine a new electro-optic modulation technique and a conventional one to resolve the two E-tield components. The new modulation effect on the optical probing beam is caused by rotation of the principal axis the electro-optic crystal, which is proportional to the E-field. Inasmuch as there is no free charge involved in the axis rotation, rotation modulation of the axis can be as fast as conventional modulation. The principles are carefully derived, and an experimental system constructed, to measure two-dimensional E-field vectors on a test pattern. The results are in good agreement with those obtained with commercial software for electromagnetic simulation. The sensitivities of two tangential E-field components are 76 (mV/cm)/root Hz and 0.8 (V/cm)root Hz, respectively. The root-mean-square error of an E-field directional measurement is 1.5 degrees. (C) 2000 Optical Society of America OCIS codes: 120.5410, 230.2090, 230.4110, 130.6010.
URI: http://hdl.handle.net/11536/30251
ISSN: 0003-6935
期刊: APPLIED OPTICS
Volume: 39
Issue: 27
起始頁: 4985
結束頁: 4993
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