ABSTRACT
Spectral and temporal characteristics of the photoinduced absorption in barium titanate were measured. Absorption peaks were observed at 450 and 820 nm with 60-msec decay times and at 775 nm with a 6-sec decay time.
ABSTRACT
The sublinear dependence of the photorefractive grating formation time on laser intensity in BaTiO(3) is explained by the secondary-center photorefractive model.
ABSTRACT
An analytical method of matching the mode of an input laser to the lowest-order mode of a passive resonant ring laser gyro is described, as are the steps in determining the location and focal length of cylindrical mode matching lenses. Results were obtained with no mode matching, with a compromise spherical lens, with horizontal mode matching only, and with the proper cylindrical mode matching lenses. Compared with no mode matching, the latter case shows that the amplitude of the lowest-order mode is increased approximately 2.5 times. In addition, the number and intensity of higher-order modes are reduced to near zero, and the relative intensity of the lowest-order mode to the higher-order mode increased from approximately 5 to approximately 60 times greater.
