OPTICAL TRANSMISSION LINE AND A METHOD OF FORMING THEREOF

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 connected to an outlet of a transmission medium having a polarization mode dispersion ? 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.12) ? n ? (A/T0) ? ? ? m ? .lambda.s}?C (where n is a number of beats occurring in the optical signal and c is the light velocity).