ON FINDING THE FOCAL LENGTH OF INDUCED THERMAL LENS OF SOY SAUCE SAMPLE USING MATRIX SYSTEM AND OBSERVING THE EFFECT OF VARIATION OF PARAMETERS
by Paras Kumar
Abstract – The paper presents the problem in which a Gaussian beam is passed through an absorbing medium which results in heating of the medium which leads to the formation of the thermal lens due to radiative and non-radiative relaxation processes. In this paper, we also discuss the method to find the focal length of the induced thermal lens and by varying parameters such as concentration, focal length, power of the beam. We were able to infer the trend. At last, we were able to spot the effect of gravity in our experimental result during the experiment of the knife-edge method.