A direct modulation phase shift keying transmission system (DM-PSK transmission system) is disclosed for coherent optical fiber transmission in which an injection current supplied to a semiconductor laser is adapted to be directly modulated. This system presents useful features in automatic frequency...http://www.google.fr/patents/US5228043?utm_source=gb-gplus-shareBrevet US5228043 - Direct modulation phase shift keying (DM-PSK) transmission system
Direct modulation phase shift keying (DM-PSK) transmission system
