Laser Heat Pulse Erasing of Spectral Holes
Original Publication Date: 1984-Sep-01
Included in the Prior Art Database: 2005-Feb-05
Local heating from a pulsed laser is used to erase spectral holes. A frequency domain optical store utilizes the phenomenon of persistent spectral hole-burning to store digital information. Persistent spectral hole-burning (PSHB) occurs whenever the inhomogeneously broadened absorption profile of a collection of absorbing centers in a solid is locally modified by the action of an exciting narrow band laser. PSHB can occur due to photochemical or photophysical mechanisms, the basic requirement being that the absorbing centers possess at least two ground state configurations which are coupled by the laser radiation.