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Updated: May 11, 2026
Design and Characterization Methodology for Efficient Wide Range Tunable MEMS Filters
Published on: February 4, 2018
Characteristics of two-wave mixing adaptive interferometer with CdTe:Ge at 1.06 and 1.55 μm and improved temporal
Konstantin Shcherbin1, Volodymyr Danylyuk, Marvin Klein
1Institute of Physics, National Academy of Sciences, Kiev, Ukraine. kshcherb@iop.kiev.ua
Abstract:
We have characterized a two-wave mixing adaptive interferometer based on dc-biased photorefractive CdTe:Ge crystal at 1.06 and 1.55 μm. Excellent performance is shown at both wavelengths by demonstration of high sensitivity for measurement of small displacements and high cutoff frequency at low intensity. We have achieved a considerable reduction of the undesired low-frequency response using controlled heating of the crystal, which ensures depopulation of corresponding traps. The experimental data are used for measurement of the real and imaginary parts of the coupling constant, as well as the dielectric relaxation time of the crystal and the mobility-lifetime product of the free charge carriers.
