Format Conversion of Optical Multilevel Signals Using FWM-Based Optical Phase Erasure

• An optical format conversion scheme of multilevel phase-shift keying (M-ary PSK) signals using the four-wave mixing based optical phase erasure is discussed in this paper. The conversion from differential quadrature phase-shift keying (DQPSK) to differential phase shift keying at 10 and 160 Gbaud, and the conversion from differential eight-ary phase-shift keying to DQPSK at 40 Gbaud have been experimentally demonstrated. The proposed scheme could be used as a phase erasure, in which a redundant tributary of the M-ary PSK signal is removed, or as an "updater" where the unwanted phase pattern is replaced with the new pattern.

Ämnesord

TEKNIK OCH TEKNOLOGIER  -- Elektroteknik och elektronik (hsv//swe)

ENGINEERING AND TECHNOLOGY  -- Electrical Engineering, Electronic Engineering, Information Engineering (hsv//eng)

Nyckelord

differential quadrature

communications

differential 8-ary phase-shift keying

optical fiber

Differential phase-shift keying (DPSK)

four-wave mixing (FWM)

loop-mirror

format conversion

phase-shift keying (DQPSK)

phase modulation

wavelength converter

(D8PSK)

Publikations- och innehållstyp

art (ämneskategori)

ref (ämneskategori)