Experimental studies of combustion systems are necessary for the understanding of combustion processes and the ability to improve both performance and theoretical models. Laser Induced Fluorescence is one of the most commonly used methods for combustion diagnostics. It is very sensitive and can be used for two-dimensional imaging of thin sheets of the combustion zone. The method can be used to study for example concentration of combustion gases and initial, intermediate and final products. It can also give information about temperature in different regions of the combustion zone. This report describes the methods and experimental results are reported.