Pfister O, Brown W J, Stenner M D, Gauthier D J
Department of Physics and Center for Nonlinear and Complex Systems, Duke University, Durham, North Carolina 27708-0305, USA.
Phys Rev Lett. 2001 May 14;86(20):4512-5. doi: 10.1103/PhysRevLett.86.4512.
We describe the operating characteristics of a new type of quantum oscillator that is based on a two-photon stimulated emission process. This two-photon laser consists of spin-polarized and laser-driven 39K atoms placed in a high-finesse transverse-mode-degenerate optical resonator and produces a beam with a power of approximately 0.2 microW at a wavelength of 770 nm. We observe complex dynamical instabilities of the state of polarization of the two-photon laser, which are made possible by the atomic Zeeman degeneracy. We conjecture that the laser could emit polarization-entangled twin beams if this degeneracy is lifted.
我们描述了一种基于双光子受激发射过程的新型量子振荡器的工作特性。这种双光子激光器由置于高精细度横向模式简并光学谐振腔中的自旋极化且受激光驱动的39K原子组成，在770纳米波长处产生功率约为0.2微瓦的光束。我们观察到双光子激光器偏振态的复杂动态不稳定性，这是由原子塞曼简并实现的。我们推测，如果这种简并被消除，该激光器可能会发射偏振纠缠双光束。
