Abstract
The nonlinear Sagnac-loop squeezer at zero group velocity dispersion is analyzed using a finite relaxation time for the Kerr effect. A recently developed theory that avoids the discretization of time is used. A closed form expression for the photocurrent fluctuation level is derived. It is shown that in the linearized limit, Gaussian pulses experience slightly more squeezing when their duration is comparable to the response time of silica. The present treatment indicates that the electronic response time determines the length of fiber beyond which substantial deviations from the linearized theory occur. Contrary to the discretized-time model, the continuous-time theory does not exhibit quantum revivals.
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