Non-acoustic measurement unit

A non-acoustic measurement unit intended to be integrated into an all-optical antenna comprising at least one hydrophone, said non-acoustic measurement unit comprising at least one non-acoustic sensor with electrical output able to deliver at least one electrical signal representative of at least one physical quantity, a passive electro-optical transducer subjected to said electrical signal and a portion of an optical fiber intended to convey non-acoustic measurements comprising a first sensitive zone on which said passive electro-optical transducer acts, the passive electro-optical transducer acting on a mechanical constraint undergone by the first sensitive zone in such a way that a value of a measurable property of a first optical signal conveyed by the optical fiber intended to convey non-acoustic measurements is representative of the electrical signal, and at least one photovoltaic cell coupled electrically to said non-acoustic sensor so as to electrically supply said sensor.