An optical fiber cable and magnetic field detector magnetostrictively reave to the presence of an external magnetic field is presented, and methods thereof. The optical fiber cable comprises a elongated optically transparent core sheathed by a magnetostrictively responsive jacket disposed about the...http://www.google.com.au/patents/US4433291?utm_source=gb-gplus-sharePatent US4433291 - Optical fiber for magnetostrictive responsive detection of magnetic fields
