The broadening of the phase distribution due to linear amplification

James D. Kafka, J. B. Clark

Dragomir M Davidović, D Lalovic

Using the description of the linear phase insensitive amplification of a quantum state available in the literature we prove that to every state , produced from the initial state by such amplification, there corresponds a phase space distribution , where is the Husimi function of the initial state. The scaling parameter satisfies the relation and decreases with time while, as we have shown earlier, the scaled function is again a Husimi distribution. We prove, using these facts, that if the definition of the phase insensitive amplification is physically correct then the distribution of the phase of a state is unambiguously given as the corresponding marginal distribution obtained from its Husimi distribution represented in polar coordinates.

Khalid Zaheer, Muhammad Suhail Zubairy

F. A. Hopf, Marlan O. Scully

E G Lariontsev, V. N. Serkin

An analysis is made of the propagation of a frequency-modulated light pulse in a linearly amplifying medium with an inhomogeneously broadened gain profile. It is shown that a pulse can be compressed considerably during amplification. Conditions are established under which strong distortions of the pulse shape may result in its splitting. An analysis is made of the influence of the phase self-modulation of radiation on the shape of ultrashort light pulses in oscillators and amplifiers.

Radan Slavı́k