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Conferences > IQEC > 1990 > QTHI > QTHI30
  • International Quantum Electronics Conference
  • OSA Technical Digest (Optica Publishing Group, 1990),
  • paper QTHI30

Observation of enhanced fundamental linewidth of a laser due to nonorthogonality of its longitudinal eigen-modes

W. A. HAMEL and J. P. WOERDMAN

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Abstract

It has been stressed recently that the longitudinal and transverse eigenmodes of a laser resonator become nonorthogonal due to losses.1,2 One major consequence of this nonorthogonality is that the spontaneous emission power into each mode is increased.1 The fundamental (Schawlow-Townes) linewidth of a single-mode laser ΔνST is determined by the spontaneous emission power in the oscillating mode; thus nonorthogonality is predicted to increase ΔνST by a factor f > 1, called the excess spontaneous emission factor.

© 1990 Optical Society of America

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