A method and apparatus for measuring the kerr - coefficient of non-linearity in an optical single mode fiber

摘要

it sends out a fibre (5) a train of rectangular pulses, having a wavelength such that the fiber (5) operates under anomalous dispersion.peak power as to cause modulation instability in the fiber and the relationship between duration and repetition period that the average power is below the threshold for which it occurs, the effpound brillouin stimulated.measure on the spectrum of pulse current by the fiber.the maximum value of the gain of the modulation instability in the cultural of values of peak power of the pulses and gives the coefficient of not linearita's kerr dat maximum valuesthe measured gain of modulation instability while minimizing the error, in the range of values of power used for the measurement.with respect to a theoretical curve which expresses the maximum gain as a function of the peak power. it also provides the equipment to achieve the preocedimento. (fig. 1).