Magneto-optic magnetometer

A method for measuring a magnetic field using a magnetometer, the method comprising:

• receiving polarized light at the magnetometer, wherein the magnetometer includes an optical resonator that is operable at a resonant frequency or wavelength in the absence of an external magnetic field, the magnetometer comprising:
• a core comprising a photonic material, wherein the core is configured to receive the polarized light and maintain propagation of the polarized light that traverses therethrough;
• and
• a cladding that comprises a polymer-based magneto-optic (MO) material, wherein the polymer-based MO material is in contact with the core and surrounds at least part of the core, the core and the cladding configured to allow at least a portion of the polarized light to enter the cladding to interact with the polymer-based MO material;
• positioning an operating wavelength of the resonator on resonance to obtain a first output power value from the optical resonator;
• exposing the magnetometer to the external magnetic field;
• measuring light that is output from the optical resonator in the presence of the external magnetic field to obtain a second output power value;
• and
• determining a strength of the external magnetic field based on differing values of the first output power value and the second output power value.