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We consider sub-Poissonian single-mode laser with external synchronizationand analyze its applicability to the problems of quantum information. UsingHeisenberg-Langevin theory we calculate the quadrature variances of the fieldemitted by this laser. It is shown that such systems can demonstrate strongquadrature squeezing. Taking into account that the emitted field is temporallymulti-mode the application of such sources to multichannel quantumteleportation and dense coding protocols is discussed.

Broadband squeezed light from phase-locked single-mode sub-Poissonian lasers