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September 2, 2026Journal of Optical Communications

Effect of channel spacing and launch power on performance of DCF, FBG, and OPC based 8 × 10 Gbps DWDM optical transmission systems with nonlinear penalty analysis

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Authors

RGRaj Kumar GuptaMMMadanlal Meena

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Overview

Simulation study reveals superior signal quality and nonlinear compensation for optical phase conjugation in DWDM systems, highlighting its efficacy for long-distance optical transmission.

Key Points

  • Compare the transmission performance and nonlinear penalties of dispersion compensating fiber, fiber Bragg grating, and optical phase conjugation across various channel spacings and launch powers in DWDM optical systems.
  • Simulated an 8 × 10 Gbps DWDM transmission system across a 150 km single-mode fiber using OptiSystem software.
  • Tested performance under 50 GHz, 100 GHz, and 200 GHz channel spacings at varying optical launch powers up to +10 dBm.
  • Analyzed nonlinear optical penalties by simulating transmission with and without self-phase modulation, cross-phase modulation, and four-wave mixing effects.
  • At 100 GHz channel spacing and 10 dBm input power, optical phase conjugation achieved a Q-factor of 34.16 dB and a bit error rate of 2.68E-256, outperforming DCF (17.15 dB; 2.04E-66) and FBG (8.63 dB; 2.41E-18).
  • Fiber Bragg grating produced the highest optical signal-to-noise ratio at 25.24 dB due to its passive structure and lower insertion loss.
  • Optical phase conjugation reduced the nonlinear penalty by 75.6% at +10 dBm launch power (0.70 dB penalty) relative to dispersion compensating fiber (2.87 dB penalty).

Cite This Study

Gupta et al. (2026) studied this question.

synapsesocial.com/papers/6a97e29ec562ede874ec6e0ahttps://doi.org/10.1515/joc-2026-0287
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