Fast adaptive interferometer based on CdTe crystal and low power radiation

摘要

An adaptive fiber-optical interferometer, which is based on dynamic reflection hologram recorded in the photorefractive crystal of cubic symmetry without applying any electrical field, is developed. Adaptive properties of dynamic hologram enable the solution of an interferometer's working point uncontrollable drift problem caused by external factors. Theoretical analysis has allowed us to find the optimal set of parameters for both interacting waves and crystal to reach the maximal sensitivity of the measuring system. Use of semiconductor crystal CdTe with fast recording time of a dynamic hologram makes it possible to achieve high cutoff frequencies at reasonably low light intensities. As a result the measuring system is characterized by low energy consumption and ability of stable operation of long duration in industrial environment.