Abstract

It is well known that interferometers are very sensitive instruments for detecting different physical parameters. De-velopment of these systems on a fiber-optic base makes them very promising for different practical applications due to small weight and dimensions of fiber-optics elements, their immunity to electro-magnetic influence, high elasticity, feasibility etc. However, high sensitivity of the interferometer makes it open to influence of enviromnent changes. It is well known that two-wave mixing in photorefractive (PR) crystals allows not only transfonnation of phase modulation into modulation of the output light power but also compensation of any low-frequency modulations caused by change of envi-ronmental conditions. However, application of high-voltage electric field to the PR crystal is required for both increasing the efficiency of dynamic hologram [1] and realization of the linear regime of phase demodulation [2], Moreover, interacting light beams must be of rather high intensity to provide recording of fast dynamic hologram.

© 2007 IEEE