Question

A laser diode has dielectric constant of ε = 4εo and has a cavity length 1-mm long

with one perfect mirror and one mirror with a power reflection coefficient of 0.99. It

operates at wavelength of 1-micron with linewidth of 0.1 percent associated with the

width of the energy levels involved. (a) What is the frequency spacing (Hz) between

resonances for this laser cavity? (b) Approximately how many different frequency

lines are emitted by this laser within its overall natural bandwidth?

Answer 1