The Ring laser gyroscope reference article from the English Wikipedia on 24-Apr-2004 (provided by Fixed Reference: snapshots of Wikipedia from wikipedia.org)

Ring laser gyroscope

A ring laser gyroscope uses interference of laser light within a fiber optic ring to detect changes in orientation and spin. It is an application of a Sagnac interferometer.

Unlike a mechanical gyroscope, the device does not resist changes to its orientation (or at least, these effects are extremely tiny because photons are so light).

External link

• Optical Kerr-effect in fiber-optic Brillouin ring laser gyroscopes

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