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

Reina Aydé (1) , Gwenaël Gaborit (2) , Jean Dahdah (3) , Lionel Duvillaret (4) , Nadège Courjal (3) , Clément Guyot (3) , Raphaël Sablong (5) , Anne-Laure Perrier (2) , Olivier Beuf (1)

1 RMN et optique : De la mesure au biomarqueur
2 IMEP-LAHC - Institut de Microélectronique, Electromagnétisme et Photonique - Laboratoire d'Hyperfréquences et Caractérisation
3 FEMTO-ST - Franche-Comté Électronique Mécanique, Thermique et Optique - Sciences et Technologies (UMR 6174)
4 Kapteos SAS
5 LSP - Laboratoire de Spectrométrie Physique

— 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.

Mots clés: Index Terms— Electro-optical devices; optical sensors; magnetic field measurement; magnetic resonance imaging; nuclear magnetic resonance; Electro-optical devices

Domaines: Sciences de l'ingénieur [physics]; Sciences du Vivant [q-bio]

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, 2014, 26 (12), pp.1266 - 1269. ⟨10.1109/LPT.2014.2321099⟩. ⟨hal-01814491⟩