Describing the spatial profile of the laser light. D. Laser Dynamics and Characteristics
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Light interaction with matter begins at the atomic level. When a photon strikes an atom, the atom can absorb that energy. This forces an electron to jump from a lower energy level ( E1cap E sub 1 ) to a higher energy level ( E2cap E sub 2 Describing the spatial profile of the laser light
Longitudinal modes dictate the spectral purity (the specific colors) of the laser. Light waves must form standing waves inside the cavity to survive. This means the cavity length ( ) must equal an integer multiple ( ) of half the wavelength ( Once you have it for 3 weeks, use
An excited atom drops to a lower state, releasing a photon in a random direction.