A resonator fiber optic gyroscope (100A, 100B, 100C) comprising: at least one tunable light source (102A, 102B) configured to emit a clockwise optical signal (104A, 122A) and a counterclockwise optical signal (104B, 122B); an optical chip configured to receive the clockwise optical signal (104A, 122A) and the counterclockwise optical signal (104B, 122B), wherein the optical chip couples the clockwise optical signal (104A, 122A) and the counterclockwise optical signal (104B, 122B) from the at least one tunable light source (102A, 102B) into a fiber optic resonator and couples the clockwise optical signal (104A, 122A) and the counterclockwise optical signal (104B, 122B) from the fiber optic resonator to at least one photodetector (130A, 130B, 130C); the fiber optic resonator comprising a fiber optic coil having a first end point and a second end point, wherein the fiber optic coil has a 90-degree splice; wherein the fiber optic coil is wrapped around a first fiber stretcher that is located between the first end point and the 90-degree splice and wherein the fiber optic coil is a polarization maintaining fiber optic coil; wherein the at least one photodetector (130A, 130B, 130C) is configured to sample the clockwise optical signal (104A, 122A) and the counterclockwise optical signal (104B, 122B); characterized in that: the 90-degree splice is located substantially half-way between the first end point and the second end point, the fiber optic coil is wrapped around a second fiber stretcher that is located between the second end point and the 90-degree splice, and the fast-axes of the polarization maintaining fiber optic coil are orthogonally oriented to one another at the first end point and at the second end point. at least one tunable light source (102A, 102B) configured to emit a clockwise optical signal (104A, 122A) and a counterclockwise optical signal (104B, 122B); an optical chip configured to receive the clockwise optical signal (104A, 122A) and the counterclockwise optical signal (104B, 122B), wherein the optical chip couples the clockwise optical signal (104A, 122A) and the counterclockwise optical signal (104B, 122B) from the at least one tunable light source (102A, 102B) into a fiber optic resonator and couples the clockwise optical signal (104A, 122A) and the counterclockwise optical signal (104B, 122B) from the fiber optic resonator to at least one photodetector (130A, 130B, 130C); the fiber optic resonator comprising a fiber optic coil having a first end point and a second end point, wherein the fiber optic coil has a 90-degree splice; wherein the fiber optic coil is wrapped around a first fiber stretcher that is located between the first end point and the 90-degree splice and wherein the fiber optic coil is a polarization maintaining fiber optic coil; wherein the at least one photodetector (130A, 130B, 130C) is configured to sample the clockwise optical signal (104A, 122A) and the counterclockwise optical signal (104B, 122B); characterized in that: the 90-degree splice is located substantially half-way between the first end point and the second end point, the fiber optic coil is wrapped around a second fiber stretcher that is located between the second end point and the 90-degree splice, and the fast-axes of the polarization maintaining fiber optic coil are orthogonally oriented to one another at the first end point and at the second end point. the 90-degree splice is located substantially half-way between the first end point and the second end point, the fiber optic coil is wrapped around a second fiber stretcher that is located between the second end point and the 90-degree splice, and the fast-axes of the polarization maintaining fiber optic coil are orthogonally oriented to one another at the first end point and at the second end point.