Optical transmission line and distortion reduction technique.

摘要

In this invention, an optical analog signal obtained such that light having a wavelength lambda 1 is intensity-modulated or frequency-modulated with a modulation index m per channel and a chirping amount lambda s for 100% modulation is transmitted. An optical element (110) connected to an outlet of a transmission medium having a polarization mode dispersion tau with respect to an optical signal is selected such that when the optical signal output from the optical element requires a predetermined composite second-order distortion C [dB], a transmittance T0 of the optical element for the light having the wavelength lambda 1 and a polarization dependency A of an insertion loss satisfy the following condition: 20 log10{ (2 pi c/ lambda 1<2> ) . n . (A/T0 ) . tau . m . lambda s}