Question

A Ruby laser has the following parameters:
R1 = 100%R
R2 = 90% R
Length of the rod = 5cm
Attenuation = 0.1m-1
Progressively darker neutral-density optical filters are inserted into the
cavity until the laser ceases to operate: the laser oscillates until an OD of
0.3 was inserted at which point is stops.
Calculate the gain of the laser amplifier medium.

Answer 1