Problem #3: A laser is made up of a resonator cavity and a gain medium. (a) Discuss the possible sources of loss in a resonator cavity. (b) Sketch the intensity output of a resonator in frequency space. (c) What are sources of loss in the gain medium? (d) Sketch the intensity output of the gain medium in frequency space. (e) If the resonator has a length of 1 cm and the gain medium (which fills the space between the resonator mirrors) has a refractive index of 1.8 and a gain bandwidth of 6 x 10' Hz, how many modes will oscillate in this laser