Abstract
A highly sensitive electro-optic (EO) probe has been proposed and realized by tethering an ultra-high-quality ()-factor etalon to a single-mode fiber operating at around a 1550-nm wavelength. For the adopted EO etalon, the electric-field-induced refractive index modification is deemed to shift its own spectral response. An electrical modulation signal is anticipated to be produced when a probe light beam with a fixed bias wavelength impinges upon the EO etalon. The EO etalon is particularly required to exhibit a remarkably steep spectral response and thus facilitate modulation efficiency. In aiming to scrutinize the performance in terms of sensitivity, two EO probes involving profoundly different -factors were prepared and applied to detect the electric field emitted from a microstrip device. It was confirmed that the sensitivity could be efficiently enhanced by as much as 28 dB by boosting the -factor 18 times when a probe light beam operating at was properly collimated and polarized. Accordingly, the minimum detectable signal was successfully diminished.
© 2018 Optical Society of America
Full Article | PDF ArticleMore Like This
Gwenaël Gaborit, Guillermo Martin, Jean-Louis Coutaz, Lionel Duvillaret, Samir Kassi, and Daniele Romanini
Appl. Opt. 46(11) 2001-2009 (2007)
Wen-Kai Kuo, Zhi-Jian Li, Hui-Chi Lin, and Hsiao-Yu Chou
Appl. Opt. 50(30) 5889-5893 (2011)
Clemens Kieninger, Yasar Kutuvantavida, Delwin L. Elder, Stefan Wolf, Heiner Zwickel, Matthias Blaicher, Juned N. Kemal, Matthias Lauermann, Sebastian Randel, Wolfgang Freude, Larry R. Dalton, and Christian Koos
Optica 5(6) 739-748 (2018)