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The power spectral density is derived analytically for the phase noise generated by cross-phase modulation from a randomly modulated signal to a continuous-wave probe signal. The autocorrelation function of the probe signal is first derived and the power spectral density is then evaluated by Fourier transform. The power spectral density may be asymmetric with some discrete tones.
Multiwavelength oscillation is demonstrated with a novel laser scheme, in which cascaded second-order nonlinearity in a periodically poled LiNbO 3 (PPLN) waveguide is used to double the lasing lines. Twenty-two wavelengths approaching S- and L-bands are simultaneously achieved with a channel spacing of 1.6 nm, and the band separation is changeable. The number of wavelengths and channel spacing...
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