A receive coil (46, 46', 46'') receiving a magnetic resonance signal includes an optical resonant cavity (82, 82', 82'') having an electro-optically active medium (90, 90', 90''). A radio frequency antenna (80, 80', 80'') is coupled with the electro-optically active medium such that reception of the magnetic resonance signal by the radio frequency antenna modulates an optical characteristic of the optical resonant cavity. An interventional instrument (48) is adapted for partial insertion into an associated imaging subject (16). The radio frequency antenna and the optical resonant cavity are disposed on a portion of the interventional instrument that is inserted into the associated imaging subject. At least one optical fiber (52, 54) is optically coupled with the optical resonant cavity. An end of the at least one optical fiber extends outside of the associated imaging subject when the interventional instrument is partially inserted.