Research On The Regeneration Of Optical Vector Signal Based On Noise Compensation

With the development of "Internet +",the data will develop in a more explosive growth which drive the development of communication areas. And the speed of the electrical signal can't meet the bandwidth demand of users, the optical signal has been displayed a strong potential in this respect. Optical signals with different modulation format have different constraints. The main astricted factors of intensity modulation signal are the number of the modulation order, which will cause the degradation of the intensity modulation signal in the transmission process. To phase modulation signal, phase noise is a key astricted factors. As the transmission of the signal in optical fiber, the amplitude of noise will be converted to phase noise, therefore, the phase and amplitude regeneration of optical vector signal phase is very critical. The main work and research content of this paper are as follows:1) MPSK signal amplitude and phase noise. The method of amplitude and phase regeneration, different from traditional methods of phase regeneration -will squzze the noise from a circle to an ellipse, the method can squeeze the noise of amplitude and phase noise simultanously, and can avoid the transformation amplitude noise- phase noise, improve the signal quality, extend the transmission distance.2) The rectangular 8QAM signal regeneration. Because there are eight phase and two amplitude in the signal, so the regeneration is difficult to realize.In the fourth chapter, the scheme of regeneration the 8QAM signal by using QPSK regenerative structure is proposed. The scheme reduces the implementation difficulty, the regeneration of the signal is more reachable.