The method uses two wave mixing geometry with Bi 12 TiO 20 as the recording medium. The diffraction efficiency of two wave mixing serves as the parameter for testing the collimation.
Abstract
A new method to test collimation of laser beam using photorefractive crystal is developed. The method uses two wave mixing geometry with Bi12TiO20 as the recording medium. The diffraction efficiency of two wave mixing serves as the parameter for testing the collimation.