Prototype michelson interferometer with Fabry-Perot cavities
We describe a rigid, internally modulated Michelson interferometer with Fabry-Perot cavities in the interferometer arms. The high contrast (0.986) and the small cavity losses (2.7%) permit efficient use of the light power available. The measured shot-noise-limited displacement sensitivity for 35 mW of light power is 2.5 X 10-17 m√Hz, in good agreement with the calculated signal-to-noise ratio. © 1991 Optical Society of America.