Nonadiabatic linewidth of a Lambda -type noninversion laser.
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abstract
The linewidth of a -type noninversion laser is calculated on the basis of a c-number Langevin approach in lowest order of the laser field. It is shown that the system behaves in general that is, also in the good-cavity limit nonadiabatically. In the nonadiabatic regime a substantial deviation of the laser linewidth from the Schawlow-Townes formula is found and a simple interpretation is given. 1994 The American Physical Society.