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Unbiased Electro-Optic Waveguide as a Sensitive Nuclear Magnetic Resonance Sensor

Abstract : — A pigtailed Ti:LiNbO 3 waveguide is here associated to a specific nuclear magnetic resonant coil to perform a low invasive magnetic field measurement. The developed device exploits a passive electro-optic transduction between the measured magnetic field and polarization state modulation of a laser probe beam. Because of the use of integrated optics, the coil electromotive force induces a dramatically enhanced electric field, thus leading to sensitivity improvement. A minimum detectable magnetic field lower than 60 fT · Hz −1/2 is achieved at the resonant frequency of 128 MHz. A dynamic range exceeding 100 dB is experimentally demonstrated.
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Reina Aydé, Gwenaël Gaborit, Jean Dahdah, Lionel Duvillaret, Nadège Courjal, et al.. Unbiased Electro-Optic Waveguide as a Sensitive Nuclear Magnetic Resonance Sensor. IEEE Photonics Technology Letters, Institute of Electrical and Electronics Engineers, 2014, 26 (12), pp.1266 - 1269. ⟨10.1109/LPT.2014.2321099⟩. ⟨hal-01814491⟩



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