Frequency-resolved optical gating
Ok kiddo, so let's imagine you have a big box filled with lots of different colored crayons. When you draw a picture with all the crayons, you get a rainbow of colors! But you want to see each color separately to understand how they fit together in your picture.
Now imagine instead of crayons, we have light waves. Just like crayons, light waves can have different colors too! This is called the "frequency" of the light wave, which is basically how many times it goes up and down in a second (just like how you can count how many times you jump up and down in a minute).
Frequency-resolved optical gating is like a special tool that lets us see each color of light wave in a picture, just like how you can see each color of crayon in your drawing. It works by shining a laser at the picture and then measuring how the light waves bounce back. This tells us what colors the light waves are and how they are organized in the picture.
So imagine that now you can color your picture in all the different colors you want and you can also see each color individually! That's what frequency-resolved optical gating does with light waves - it lets us see each color separately so we can understand it better.
Now imagine instead of crayons, we have light waves. Just like crayons, light waves can have different colors too! This is called the "frequency" of the light wave, which is basically how many times it goes up and down in a second (just like how you can count how many times you jump up and down in a minute).
Frequency-resolved optical gating is like a special tool that lets us see each color of light wave in a picture, just like how you can see each color of crayon in your drawing. It works by shining a laser at the picture and then measuring how the light waves bounce back. This tells us what colors the light waves are and how they are organized in the picture.
So imagine that now you can color your picture in all the different colors you want and you can also see each color individually! That's what frequency-resolved optical gating does with light waves - it lets us see each color separately so we can understand it better.