An optical Communication System in which compensate the Polarization Mode Dispersion, a method to compensate PMD and a device which is used in this system and This method

摘要

An optical Communication System (100) comprises: a First device (10) to transmit at least a Digital Optical Signal (1000) comprendeun bit Stream,That has a transfer rate of default and a bit FC Ranu with a length of time Predetermined ra l / FC; an optical Transmission Line (30),Optically connected to the first device (10),For the Propagation of the Optical Digital Signal (1000); a Second device (20) comprises a receiving device (40) and a Modulation device (200) and dispersion of modulac; Said deviceAnd Ion Scattering (200) includes: (a) an element of modulation (2000) to modulate the phase of the optical Signal (1000) by digital Modulation which is a frequency of modulacionpredet: A1)According to the erminada bitrate FC of the Digital Optical Signal (1000)(A2) a periodic variation in time is approximately symmetrical with respect to a point within the pre specified time slot, whose length is l / FCA3) and maximum amplitude of K and Periodic variation; (b) an element (204), Chromatic dispersionOptically connected to the Modulation element (2000) and is able to group delay D in every bit of the Digital Optical Signal Modulated in phase (1000); The dispersion elementChromatic (204) provides unadispersion anomalous type, when the periodic variation in time has a positive Modulation amplitude.And A Scattering of the aforementioned type normal periodic variation in time has a negative Modulation amplitude.