Measurement of Total and Longitudinal Nonlinear Phase Shift as Well as Longitudinal Dispersion for a Fiber-Optic Link Using a Digital Coherent Transceiver

Hui, Rongqing; Laperle, Charles; O’Sullivan, Maurice

doi:10.1109/jlt.2022.3198549

Cited by 8 publications

(1 citation statement)

References 12 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…In our experiments, we leverage nonlinear self-channel interference (SCI) including cross-polarization modulation (XPolM) to estimate the power profiles, as described in Appendix A. Another demonstration of estimating longitudinal nonlinear phases and span-wise CDs using XPolM between orthogonally polarized special tones can be found in [33]. The authors of [34] used cross-channel interference (XCI) between WDM channels to locate a loss anomaly.…”

Section: Other Related Workmentioning

confidence: 99%

Linear Least Squares Estimation of Fiber-Longitudinal Optical Power Profile

Sasai,

Takahashi,

Nakamura

et al. 2024

J. Lightwave Technol.

View full text Add to dashboard Cite

This paper presents a linear least squares method for fiber-longitudinal power profile estimation (PPE), which estimates the optical signal power distribution throughout a fiber-optic link at a coherent receiver. The method finds the global optimum in the least squares estimation of the longitudinal power profiles; thus, its results closely match the true optical power profiles and locate loss anomalies in a link with high spatial resolution. Experimental results show that the method achieves accurate PPE with an RMS error of 0.18 dB from OTDR. Consequently, it successfully identifies a loss anomaly as small as 0.77 dB, demonstrating the potential of a coherent receiver in locating even splice and connector losses. The method is also evaluated under WDM conditions with optimal system fiber launch power, highlighting its feasibility for use in practical operations. Furthermore, the fundamental limit for stable estimation and the spatial resolution of least-squares-based PPE are quantitatively discussed in relation to the ill-posedness of the PPE by evaluating the condition number of the nonlinear perturbation matrix.

show abstract

Section: Other Related Workmentioning

confidence: 99%