What are the characteristics of Beijing femtosecond laser?

Femtosecond laser is a kind of laser that runs in pulse form, and its duration is very short, only a few femtoseconds. A femtosecond is 10- 15 seconds, which is one trillionth of 1 second. It is thousands of times shorter than the shortest pulse obtained by electronic method, and it is the shortest pulse that human beings can obtain under experimental conditions at present. The instantaneous power of femtosecond laser is very high, reaching tens of billions of watts, which is 100 times more than the total power generated in the world at present. Femtosecond laser can be focused in a space smaller than the diameter of hair, making the intensity of electromagnetic field several times higher than the force of nucleus on surrounding electrons. Public ophthalmology