| 摘要 |
PROBLEM TO BE SOLVED: To provide a resonator gyro for small-sized navigation grade an applications with an affordable cost. SOLUTION: A method and an apparatus are provided to determine the rotational rate of an optical gyro. An optical gyro 10 includes at least one substrate 34, a multi-frequency light source (MFLS) mounted on the substrate, and a resonator 25 coupled to the MFLS. The MFLS is configured to produce a first light beam having a first frequency and a second light beam having a second frequency and phase locked with the first light beam. The resonator includes an optical fiber coil 24 having a hollow core. The resonator is configured to circulate a portion of each of the first and second light beams through the hollow core. The portion of the first light beam propagates in a first counter-propagating direction, and the portion of the second light beam propagates in a second counter-propagating direction. A measured difference between the first and second frequencies indicates a frequency shift proportional to the rotation rate of the optical gyro. COPYRIGHT: (C)2008,JPO&INPIT
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