Destimulating the Journalism Laser
A LASER, which is technically an acronym that stands for Light Amplification by Stimulated Emission of Radiation, works in general as follows:
A
resonance chamber is filled with some substance and "stimulated" in
some manner so it wants to release photons. The photons a substance
releases will be of certain frequencies corresponding to the
substance's emission spectrum. The chamber is an integral multiple of
of the wavelength that you desire.