Phase and amplitude regeneration of differential phase-shift keyed signals using phase-sensitive amplification
Abbreviated Journal Title
IEEE J. Sel. Top. Quantum Electron.
all-optical communications; amplitude regeneration; four-wave mixing; nonlinear interferometer (NI); phase-sensitive amplification (PSA); phase-shift keying (PSK); phase regeneration; ZERO-DISPERSION FREQUENCY; RZ-DPSK SIGNALS; LINEAR-AMPLIFIERS; SOLITON; SYSTEMS; OPTICAL AMPLIFICATION; CONSTANT DISPERSION; NOISE-FIGURE; FIBER; TRANSMISSION; COMPENSATION; Engineering, Electrical & Electronic; Optics; Physics, Applied
Phase-sensitive amplifiers (PSAs) offer numerous advantages over phase-insensitive amplifiers in optical communications. Squeezing of optical phase through PSA can remove accumulated phase jitter, which is a critical functionality for an all-optical, phase-shift keyed network. In recent experiments, reviewed in this report, different implementations of PSA were used for phase regeneration of both return-to-zero differential phase-shift keying and nonreturn-to-zero differential phase-shift keying data. The first demonstration explored the properties and performance of PSA that occurs in nonlinear interferometers. Experiments confirmed that a PSA operating in the depleted pump regime provides simultaneous reduction of amplitude and phase noise (PN). Phase regeneration performance limit was reached as a consequence of pump-wave imperfections, which can be significantly reduced through proper design. PSA that occurs directly in fiber in a traveling-wave configuration through par tially degenerate four-wave mixing was also studied. The latter implementation offers stronger phase-matched gain and suppression of amplitude-to-phase noise conversion. Technical issues that remain to be addressed are identified for each implementation. Results characterized using coherent detection offer direct measurements of the phase-regenerative behavior.
Ieee Journal of Selected Topics in Quantum Electronics
"Phase and amplitude regeneration of differential phase-shift keyed signals using phase-sensitive amplification" (2008). Faculty Bibliography 2000s. 245.