Quantum noise reduction in stationary superradiance
Fritz Haake, Mikhail I. Kolobov, Carsten Seeger, Claude Fabre, E. Giacobino, Serge Reynaud · Physical Review A · 1996
We discuss a laser with N three-level atoms resonantly and cooperatively interacting with two cavity modes. Its intensity is proportional to ${\mathit{N}}^{2}$, the linewidth scales as 1/${\mathit{N}}^{2}$, and the output intensity fluctuations display up to 100% squeezing at low frequencies. We show that quantum fluctuations of the pump do not deteriorate the squeezing significantly. We also find that the fluctuation properties of the ``passive'' cavity mode which serves to collectively relax the atoms to the ground state are similar to those of the active mode. Finally we take into account spontaneous emission. Within a certain range of frequencies good squeezing can still be found. \textcopyright{} 1996 The American Physical Society.