Patent ID: 6541951
Filing Date: 2003-04-01
Classification: H04B

Abstract:
A method a pulse waveform of target light, comprising the steps of:(a) generating sampling light having a pulse width narrower than that of target light from the target light, the sampling light having a repetition frequency and the target light having a repetition frequency, the repetition frequency of the sampling light having a constant difference with respect to the repetition frequency of the target light; (a-1) extracting clock light from the target light, the clock light being synchronized with the target light; (a-2) generating an electrical clock signal from the clock light; (a-3) generating an electrical driving signal in such a way that a constant frequency difference exists between a frequency of the electrical driving signal and a frequency of the electrical clock signal; and (a-4) generating the sampling light based on the electrical driving signal (b) supplying the sampling light and the target light to a nonlinear optical member to generate cross-correlated light between the sampling light and the target light; and (c) measuring a waveform of the target light based on the cross-correlated light.