GENERATION OF SQUEEZING IN A QUANTUM BEAT LASER. Conference Paper uri icon

abstract

  • It is shown that squeezed states can be generated in the quantum beat laser. However, the conditions that lead to squeezing are quite different from the laser conditions in which the diffusion constant for the two-mode relative phase angle vanishes. In the quantum beat laser, spontaneous emission noise from the two modes can be appreciable but is highly correlated. In squeezing the modes are also highly correlated, but the spontaneous emission is minimized relative to the quantum mode coupling. In the quantum beat laser, the vanishing diffusion constant, is described by a nonnegative coherent state representation. In contrast, squeezed states are nonclassical and cannot be described by such a representation. The concepts of the correlated spontaneous emission laser and the generation of squeezed states are, therefore, fundamentally different. The present problem has a close analogy with four-wave mixing, which is often used to generate two-mode squeezed states. The mode coupling provided by four-wave mixing allows the squeezing to be measured by heterodyne methods, which are not, in general, applicable to the measurement of squeezing in the quantum beat laser.

author list (cited authors)

  • Zubairy, M. S., Scully, M. O., & Sargent, M.

complete list of authors

  • Zubairy, MS||Scully, MO||Sargent, M

publication date

  • January 1987