Impact of Nonlinear Phase Noise on All-Optical Wavelength Conversion of 10.7-GBaud QPSK Data Using Dual Correlated Pumps

Abstract

The impact of nonlinear phase noise on all-optical wavelength conversion using four-wave mixing and dual-correlated pumps is studied. It is shown that there are optical signal-to-noise ratio requirements on the dual-correlated pumps for penalty-free all-optical wavelength conversion. We also show that the nonlinear phase noise generated in the nonlinear medium is transferred to the idler because of the uncorrelated nature of the amplitude noise on the pump signals.Index Terms-Four-wave mixing, wavelength conversion, nonlinear phase noise.

Phase Regeneration of QPSK Signal in SOA Using Single-Stage, Wavelength Converting PSA

“…We identify the following factors that are responsible for the increase in phase noise observed for low input phase noises. The poor OSNR of the pumps and consequent amplitude noise induces a nonlinear phase noise in the signal [11]. In order to avoid phase changes in the pump due to cross-gain modulation as well as the effects of SPM upon the signal, the P1:S ratio should ideally be as large as possible.…”

Fast Reconfigurable SOA-Based Wavelength Conversion of Advanced Modulation Format Data

“…In addition, FWM is transparent to the different modulation formats where the information can be encoded in the amplitude, phase, and polarization of the optical carrier [14], and is also transparent to the signal baud rate (the wavelength conversion of the on-off keying (OOK) signal at 100 Gbaud having been demonstrated in [15]). Recently, a lot of work has been done on the wavelength conversion of data signals employing different modulated formats including (Differential) QPSK, 8-Phase Shift Keying (PSK), 16-QAM, and 64-QAM based on FWM in SOAs using single pump and dual pump wavelength conversion systems [16][17][18][19][20][21][22][23][24][25][26][27].…”

Comment on: “Impact of Nonlinear Phase Noise on All-Optical Wavelength Conversion of 10.7 GBaud QPSK Data Using Dual Correlated Pumps”

“…1 We provide a qualitative description of the resulting FM-noise spectral density in the high pump OSNR regime.Index Terms-Wavelength conversion, phase noise, amplitude noise, semiconductor optical amplifier, four-wave mixing. …”

“…1 We provide a qualitative description of the resulting FM-noise spectral density in the high pump OSNR regime.…”

“…the flat FM-noise SD gives the laser the characteristic Lorentzian lineshape. In our experiments, we cancel the Weiner-Levy phase noise from the pumps due to the correlated pumping scheme [1]; therefore the phase noise of the signal and idler at the output of the SOA contains the phase noise of the signal as well as additional NLPN terms. A schematic of a typical FM-noise spectral density curve is shown in Fig.…”