Squeezed two-mode lasers without and with inversion

Xiangming Hu, Jin-sheng Peng

Xiangming Hu, PENG JIN-SHENG, (1)华中师范大学物理系; (2)华中师范大学应用物理研究所

Operation in the steady state and squeezing of quantum noise in two-mode two-photon correlated-spontaneous-emission lasers(CEL) are studied via nonliner quantum theory.It is shown that the two-mode two-photon CEL exhibits lasing without inversion and two-mode hysteresis even without triggering.The features of squeezing of quantum noise in the relative amplitude and the average phase are given.

Ataç İmamoğlu

Xiangming Hu, Jin-sheng Peng

A quantum-beat laser without inversion is proposed for producing two-mode suqeezing. Using the dressed-atom-dressed-mode approach, the master equation is derived and the variances in the sum mode intensity and in the relative amplitude and phase are calculated. When the laser is operated well above threshold, the intensity fluctuations in the sum mode are reduced below the shot noise limit with an optimum Mandel parameter of -0.5. At the same time, the fluctuations in the relative amplitude and phase are retained at their vaccum noise levels.

Fritz Haake, Daniel F. Walls, Matthew J. Collett

In this paper we demonstrate how the squeezed-pump-laser model of Marte and Walls [Phys. Rev. A 37, 1235 (1988)] may be realized in practice. We consider a three-level atomic medium interacting with two cavity modes pumped with squeezed light. We show that this pumping mechanism both achieves atomic inversion and squeezes the fluctuations on the lasing transition.

Marlan O. Scully, Michael Fleischhauer