Title :
Measurement of phase shift of photorefractive gratings by a novel method
Author :
Zha, M.Z. ; Amrhein, P. ; Gunter, P.
Author_Institution :
Inst. of Quantum Electron., Swiss Federal Inst. of Technol., Zurich, Switzerland
fDate :
4/1/1990 12:00:00 AM
Abstract :
A novel and sensitive method to measure the phase shift of the photorefractive phase grating with respect to the interference pattern is demonstrated that uses no moving mechanical parts. Results are presented for the measurement of the electrical field dependence of the phase shift in KNbO3 crystals with various Fe concentrations. Some experimental results are also presented that show the strong influence of internal photovoltaic fields on the phase shift of the space-charge field
Keywords :
diffraction gratings; electro-optical effects; iron; optical materials; optical variables measurement; photorefractive effect; potassium compounds; KNbO3:Fe crystals; electrical field dependence; interference pattern; internal photovoltaic fields; phase shift; photorefractive phase grating; sensitive method; space-charge field; Crystals; Electric variables measurement; Gratings; Interference; Iron; Mechanical variables measurement; Phase measurement; Photorefractive effect; Photovoltaic systems; Solar power generation;
Journal_Title :
Quantum Electronics, IEEE Journal of
