To operate a Nd:YAG laser, 2500 W of “wall-plug” power are required for a power supply that drives the arc lamps. The arc lamps provide pump energy to create the population inversion. The overall laser system, from power in (to the power supply) to power out (laser output beam), is characterized by the following component efficiencies:
80%—power supply operation
30%—arc lamps for pump light energy
70%—optical reflectors for concentrating pump light on laser rod
15%—for spectral match of pump light to Nd:YAG pump levels
50%—due to internal cavity/rod losses
a. Taking the efficiencies into account sequentially as they “occur,” how much of the initial 2500 W is available for power in the output beam?
b. What is the overall operational efficiency (wall-plug efficiency) for this laser?
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