Build a Sagnac Interferometer / Fiber Optic Gyroscope ( FOG )
Doug Marett ( 2010)
Instructional Video on YouTube
Some other details of the project:
1) The schematic diagram of the device:
2) A picture of the component parts (a smaller
loop is shown for reference in yellow):
These parts are selected for
the best match of components using all FC/PC or FC/UPC connectors at
the 1310nm wavelength
Calibration Test Run:
A fully assembled iFOG with a 100m fiber
loop is shown below on its mounting platform.
Kits now available!
- please visit our
Other Relevant Information:
Discussion on the theory of the Sagnac
and the Michelson-Gale experiment can be found here.
An interactive Sagnac interferometer simulator can
The original paper by Georges Sagnac can be found here.
The Dufour and Prunier paper (English Translation)
its detailed analysis of the Sagnac interferometer and how it does not
obey relativistic theory can be found here.