Experimental demonstration of nonlinearity and dispersion compensation in an embedded link by optical phase conjugation

Abstract

We report in this letter, the experimental demonstration\ud of simultaneous dispersion and nonlinearity compensation in\ud an embedded link characterized by strongly asymmetrical power\ud profiles. This result is obtained by using a highly efficient optical\ud phase conjugator based on a periodically poled lithium-niobate\ud waveguide, combined with two small dispersion-compensating\ud elements properly inserted in the link

The impact of parametric noise amplification on long haul transmission throughput

“…This is due to a combination of PMD, dispersion slope and power asymmetry reducing the efficiency of the nonlinearity compensation, the OSNR degradation due to conversion loss, and the crosstalk induced by unwanted nonlinear processes in the OPC device [35]. Techniques to improve power symmetry have already been proposed [27][28]37] and solutions to the remaining issues will undoubtedly follow.…”

Various Nonlinearity Mitigation Techniques Employing Optical and Electronic Approaches

“…For pre-dispersed SI, a length of dispersion compensating fibre (DCF) equivalent to a dispersion of amplifier spacing (L amp ) -effective length (L eff ) of SSMF was applied (-20x58 ps/nm). The effect of the added DCF is that of modifying the value of accumulated dispersion exhibited by the pulses during propagation along the nonlinear regions downstream of the SI [5]. Note that an additional DCF must be inserted at the end of the link, or electronic compensation of additional dispersion can be applied [9].…”

“…Although this technique is beneficial, it enforces severe limitations on link design. Compensation of fibre impairments based on phase conjugation or spectral inversion (SI) was also proposed [3][4][5], however, although SI has large bandwidth capabilities, it necessitates precise positioning (mid-link placement) and symmetric link design (e.g., distributed Raman amplification, etc.). Also, electronic mitigation of nonlinear impairments using digital back-propagation (DBP) has been applied to the compensation of channel nonlinearities [6].…”

Multichannel nonlinear distortion compensation using optical phase conjugation in a silicon nanowire

“…Additionally, due to their long interaction lengths, HNLFs are not good candidates for integrated solutions, even though some compact implementations have been demonstrated [11]. At the device level, there has been some demonstrations of nonlinear distortion compensation in periodically polled LiNbO 3 waveguides [12][13][14]. However, these waveguides are typically several cm long, resulting in large footprints for the nonlinear processing elements.…”