Simin Sun

All-Optical Highly Sensitive Chromatic Dispersion Monitoring Method Utilizing Phase-Matched Four-Wave Mixing

This letter represents a highly sensitive all-optical chromatic dispersion (CD) monitoring method utilizing phase-matched four-wave mixing (FWM) in highly nonlinear optical fibers (HNLFs). The monitoring ability arises from the exponential FWM gain which provides an exponential power transfer function (PTF) mapping the CD experienced by the signals onto the average power of the output idler wave. Our method is simple and much more sensitive compared to the other PTF-based monitoring methods proposed before. The sensitivity enhancement is important for highly accurate dispersion compensation and makes the method effective for signals with high duty cycles. Furthermore, by tailoring the phase-matched wavelength range our method can be used to monitor CD in a wavelength-division-multiplexing (WDM) network.

Highly sensitive chromatic dispersion monitors based on phase-matched four-wave mixing

This paper demonstrates a novel highly sensitive chromatic dispersion (CD) monitor based on exponential power transfer function (PTF) provided by phase-matched four-wave mixing (FWM). This monitor is robust to optical filter precision errors and can operate without prior knowledge of the transmission rate.

Chromatic dispersion monitor method for signals with high duty cycles

This paper proposed a method which utilizes phase-matched FWM to effectively enhance the chromatic dispersion (CD) monitoring sensitivity and monitoring range of the signals with high duty cycles. The scheme was realized by inputting a signal and continuous probe wave simultaneously into high nonlinear fiber, and the generated idler wave, whose power carried the CD information, was followed by a filter and optical power meter. The numerical simulation showed clearly that through employing this method, the monitoring range for CSRZ and NRZ could be 8 and 6.2dB respectively. In this paper we also puted forward a peak search algorithm utilizing a TDC module to increase NRZ and CSRZ monitoring range to 800 ps/nm.

Highly sensitive in-band OSNR monitors based on phase-matched four-wave mixing

This paper presents a novel all-optical in-band optical signal-to-noise (OSNR) monitoring method based on phase-matched four-wave mixing (FWM). The monitoring ability arises from the power transfer function (PTF) giving preferential gain to clean pulses when compared to noisy pulses. By selecting the phase match condition a much higher monitoring sensitivity can be achieved at a reduced input power compared to other PTF-based methods proposed before. Numerical simulations are used to quantify the sensitivity enhancement for signals with different modulation formats. (3 pages)

All-optical in-band OSNR monitors based on unphase-matched four-wave mixing

This paper presents a novel all-optical in-band optical signal-to-noise (OSNR) monitor. The monitoring ability arises from the power transfer function (PTF) provided by un-phase-matched four-wave mixing (FWM). A much higher output contrast compared to formal methods can be obtained at a much lower required power. Numerical simulations are then used to quantify the sensitivity enhancement for signals with different modulation formats which show that the monitoring sensitivity can be greatly improved by more than 10 dB for NRZ, CSRZ, RZ modulation formats while the required power can be reduced by about 3 dB.