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The European Physical Journal D

Spectral linewidth of inversionless and Raman lasers in V-type three-level systems

Xiangming Hu, J. Xiong, J.-s. Peng

Published Mar 1, 2001• 7 citations
Publisher
DOI
10.1007/s100530170259

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Journal of Modern Optics•Jul 1, 1995•5 citations
We analyze intensity and statistical properties of lasers without population inversion in a closed three-level V-type system. We derive the threshold condition and examine the intensity dependence on various system parameters. Unlike other inversionless laser systems that generate amplitude-squeezed light, the intensity fluctuation of the inversionless laser from the three-level V-type system is above the shot-noise limit in a wide parameter range studied here. \textcopyright{} 1996 The American Physical Society.
The steady-state behaviour for a Λ-type, three-level atomic system has been analysed by taking into account the effect of the phase fluctuation. It is shown that, for a monochromatic driving field, even if the probe field is in resonance with the corresponding atomic transition, a large refraction index can still be generated; for a finite linewidth of the driving field, inversionless lasing and index enhancement tends to disappear. Furthermore, the linewidth prevents the transparency of the medium.