Dispersion Management and Optical Phase Conjugation in Optical Transmission Links with a Randomly Distributed Single-Mode Fiber Length

The Effects of the Number of Fiber Spans and Residual Dispersion per Span on the System Performance in Dispersion-Managed Optical Links Combined with Optical Phase Conjugation

“…The parameters of the OPC are as follows: loss of HNL-DSF α 0 = 0.61 dB/km, nonlinear coefficient of HNL-DSF γ 0 = 20.4 W -1 km -1 , the length of HNL-DSF z 0 = 0.75 km, zero dispersion wavelength of HNL-DSF λ 0 = 1,550 nm, dispersion slope dD 0 /dλ = 0.032 ps/nm 2 /km, pump light power P p = 18.5 dBm, and pump light wavelength λ p = 1,549.75 nm. The 3-dB bandwidth of conversion efficiency [8] is calculated to almost 48 nm (1526-1574 nm) from the above-mentioned OPC parameters. Thus, all of the signal wavelengths and these conjugated wavelengths belong within the 3-dB bandwidth of the conversion efficiency.…”

“…However, DM and optical phase conjugation have certain limitations, such as less compensation for the optical signal distortion due to nonlinear Kerr effects in only DM, and the practical difficulty of the symmetry of the dispersion distribution and the strength of the optical power distribution along the fiber with respect to the position of the OPC [5]. Fortunately, a combination of DM and OPC has been recently proposed for overcoming these problems [6][7][8].…”