Lab Demonstration : Interaction of light with matter

[Music] hello everyone welcome to introduction to photonics lab session this is nature and so today we will do experiment coal we have done three excellence in law so today we will do Expo North Pole which is interaction of light with matter so it consists of course of experiments so first experiment will be built we will

just have some color filter and will pass red light as well as green light and see the transmission of the transmittivity on the color filters so we'll take the color different color filter yellow red blue and green and we'll see the transmittivity for red and green laser okay in the second part we'll be seeing the fluorescence in

rhodamine die so we have to Road I mean dyes one is Holloman 60 and or I won't be so we have three different concentrations so and we'll see the fluorescence in both the dyes third one will see the absorption so how much absorption is happening in the Raman died so in all the three concentration

we will see how much it will measure the in strain power will measure that power that it's transmitted from there we get the power that is absorbed in the day and the fourth exponent we'll see okay of this absorb power what is the power that is being emitted back so will see the fluorescence so these are the four

parts so I will start this lesson by explaining you all the components that is needed in this X for this experiment you can see that on this optical breadboard have two laser sources so this one is actually a 650 nanometer so it's a red laser smooth and this is 532 nanometer so this is green laser source

okay so you can see this one is green laser scope and here it is a red laser source okay so green laser source both are diode laser so this is a diode laser however this laser power comes to here so for coupling into fiber couple mount over here so it comes to the green