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Evidence of nonuniform phase-diffusion in a bad-cavity laser

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4 Author(s)
Kuppens, S.J.M. ; Huygens Lab., Leiden Univ., Netherlands ; van Exter, M.P. ; van Duin, M. ; Woerdman, J.P.

The quantum-limited linewidth of a short HeNe 3.39-μm laser was measured and seen to increase with increasing nonuniformity of the intracavity intensity distribution. Experiments were done inside as well as outside the bad-cavity regime; in this regime the polarization of the gain medium cannot be adiabatically eliminated but acts as a memory. Good quantitative agreement with theory is obtained inside as well as outside the bad-cavity regime. The effect of nonuniformity is well described by the longitudinal Petermann K-factor. The bad-cavity and nonuniformity effects can be separated from each other as predicted by theory

Published in:

Quantum Electronics, IEEE Journal of  (Volume:31 ,  Issue: 7 )