It has been shown theoretically1,2 that one can achieve zero-IF coherent detection of DPSK optical signals without the use of multiple receivers and special optical couplers by adding a periodic phase switching signal to the phase modulator drive.
© 1989 Optical Society of America
You do not have subscription access to this journal. Citation lists with outbound citation links are available to subscribers only. You may subscribe either as an OSA member, or as an authorized user of your institution.
Contact your librarian or system administrator
Login to access OSA Member Subscription