Exercise 5 A pulsed CO2 laser (? = 10.6 µm) is exposed to tissue with a pulse time of 10 ms. The period is T = 20 ms. The maximum power is P = 100W. The power delivered by the pulsed CO2 laser looks like the figure bellow. a) What is the energy delivered by a single pulse? b) What is the averaged power delivered by the laser during the period T? c) How many photons are contained in 5 pulses?
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From the graph, we can see that the power is 100 W and the duration of the pulse is 20 ms (milliseconds). The energy delivered by a single pulse can be calculated using the formula: Energy = Power x Time Energy = 100 W x 0.02 s = 2 Joules Show more…
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