Abstract
Abstract The application of narrow band dye lasers to high resolution spectroscopy within the inhomo-geneously broadened zero-phonon lines of colour centres is reviewed. Most work so far has centered on the use of holeburning which is exhibited by the majority of centres examined. This technique has been used to make detailed Stark and Zeeman effect measurements. In addition, optical coherent transients have been used to determine dephasing times and the results of optical phase switching and free decay experiments are discussed.
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