Enhancing the Signal Power Symmetry for Optical Phase Conjugation Using Erbium-Doped-Fibre-Assisted Raman Amplification

Tan, Mingming; Nguyen, Tu T.; Rosa, Paweł; Al-Khateeb, Mohammad; Zhang, Tingting; Ellis, A.D.

doi:10.1109/access.2020.3044525

Cited by 4 publications

(11 citation statements)

References 26 publications

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“…By matching both launch power and signal evolution in the two-span Scheme enables the signal power symmetry level of 93.4% over 2 × 50.4 km spans. The symmetry level of 93.4% over two spans is also comparable to the best symmetry level of 97% over a single 50 km span using an optimized dual-order Raman amplification shown in [2].…”

Section: Optimized Distributed Raman Amplification Design Over Multiple Fiber Spanssupporting

confidence: 57%

“…We have studied the optimization of Raman amplification schemes with backward pumping only over multiple fiber spans in [2], and this has been the only study so far regarding multiple fiber span links.…”

Section: Optimized Distributed Raman Amplification Design Over Multiple Fiber Spansmentioning

confidence: 99%

“…The nonlinear Schrödinger equations (Manakov equations) were solved using the well-known split-step Fourier method [52][53][54] with a step size of 0.1 km, in which the signal power profiles shown in Figure 13 were used. The noise from each amplifier was modeled as Gaussian noise and added to the signal after each step (0.1 km) [2] to ensure that parametric noise amplification was correctly captured. The ASE noise of EDFAs at the transmitter, the OPC and the receiver were considered in the simulations (−140 dBm/Hz noise power density).…”

Section: Optimized Distributed Raman Amplification Design Over Multiple Fiber Spansmentioning

confidence: 99%

“…The ASE noise of EDFAs at the transmitter, the OPC and the receiver were considered in the simulations (−140 dBm/Hz noise power density). More details about the simulation parameters can be found in [2].…”

Section: Optimized Distributed Raman Amplification Design Over Multiple Fiber Spansmentioning

confidence: 99%

“…Mid-link optical phase conjugation (OPC) has been used to compensate both linear (e.g., chromatic dispersion) and the nonlinear (e.g., the Kerr nonlinearity) impairments of the optical fiber, which can significantly enhance the maximum transmission distance or the data capacity, particularly for a relatively long-haul transmission system . There are a few limiting factors in the optical fiber link which constrain the efficiency of combating the nonlinear impairment in a mid-link OPC system, such as the chromatic dispersion slope and the signal power profile along the fiber [1][2][3]. Erbium-doped fiber amplifiers (EDFAs) are the most widely used amplification technique to compensate the loss in the optical fiber, but typically for a mid-link OPC system using the EDFAs in the link demonstrates that the either the maximum reach is not significantly extended, or the performance gain is modest [4][5][6][7][8][9], even when dispersion management is employed [10,11].…”

Section: Introductionmentioning

confidence: 99%

See 4 more Smart Citations

Distributed Raman Amplification for Fiber Nonlinearity Compensation in a Mid-Link Optical Phase Conjugation System

Tan

Rosa

Nguyen

et al. 2022

Sensors

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In this paper, we review different designs of distributed Raman amplifiers which have been proposed to minimize the signal power profile asymmetry in mid-link optical phase conjugation systems. We demonstrate how the symmetrical signal power profiles along the fiber can be achieved using various distributed Raman amplification techniques in the single-span and more realistic multi-span circumstances. In addition, we show the theoretically predicted results of the Kerr nonlinear product reduction with different Raman techniques in mid-link optical phase conjugator systems, and then in-line/long-haul transmission performance using numerical simulations.

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Section: Optimized Distributed Raman Amplification Design Over Multiple Fiber Spanssupporting

confidence: 57%

Section: Optimized Distributed Raman Amplification Design Over Multiple Fiber Spansmentioning

confidence: 99%

Section: Optimized Distributed Raman Amplification Design Over Multiple Fiber Spansmentioning

confidence: 99%

Section: Optimized Distributed Raman Amplification Design Over Multiple Fiber Spansmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 3 more Smart Citations

Distributed Raman Amplification for Fiber Nonlinearity Compensation in a Mid-Link Optical Phase Conjugation System

Tan

Rosa

Nguyen

et al. 2022

Sensors

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MSSI-Based Dispersion-Managed Link Configured by Randomly-Distributed RDPS Only in Former Half Section

Chung

Lee

2022

Applied Sciences

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The weakness of the dispersion-managed link, which is combined with optical phase conjugation to compensate for optical signal distortion caused by chromatic dispersion and the nonlinear Kerr effect of the standard single mode fiber is, its limited structural flexibility. We propose a dispersion map that can simultaneously compensate for the distorted wavelength division multiplexed signal while increasing the configurational flexibility. Each residual dispersion per span (RDPS) in the former half of the proposed link is randomly determined, and in the latter half, the arrangement order of RDPS is the same as or inverted in the former half. We confirm that the dispersion maps in which the RDPS distribution pattern in the latter half is opposite to the arrangement order in the former half are more effective in compensation, and the compensation effect is better than in the dispersion map of the conventional scheme. The notable result of this study is that the flexibility can be increased by randomly arranging RDPS in the former half, and compensation improvement can be achieved by inversing the order of RDPS arrangement of the former half in the latter half, which makes the dispersion profile of each half link roughly symmetric with respect to the midway optical phase conjugator.

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Bandwidth Extension in a Mid-Link Optical Phase Conjugation

Rosa

Rizzelli

Tan

2022

Sensors

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In this paper, we investigate various designs of distributed Raman amplifier (DRA) to extend amplification bandwidth in mid-link optical phase conjugation (OPC) systems and compare bands 191–197 THz and 192–198 THz giving a total bandwidth of 6 THz using a single wavelength pump. We demonstrate the use of highly reflective fiber Bragg grating (FBG) to minimize gain variation across a WDM grid by optimizing forward and backward pump powers as well as the wavelength of FBGs for original and conjugated channels. Finally, we also simulate OSNR and Kerr nonlinear reduction as a product of signals asymmetry and nonlinear phase shift (NPS) for all channels.

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Enhancing the Signal Power Symmetry for Optical Phase Conjugation Using Erbium-Doped-Fibre-Assisted Raman Amplification

Cited by 4 publications

References 26 publications

Distributed Raman Amplification for Fiber Nonlinearity Compensation in a Mid-Link Optical Phase Conjugation System

Distributed Raman Amplification for Fiber Nonlinearity Compensation in a Mid-Link Optical Phase Conjugation System

MSSI-Based Dispersion-Managed Link Configured by Randomly-Distributed RDPS Only in Former Half Section

Bandwidth Extension in a Mid-Link Optical Phase Conjugation

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