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Performance Investigation of Digital Optical Phase Conjugation-based Optical Switch

International Journal of Applied Physics
© 2025 by SSRG - IJAP Journal
Volume 12 Issue 1
Year of Publication : 2025
Authors : Havyarimana Claver, Maniragarura Nestor
10.14445/23500301/IJAP-V12I1P101

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How to Cite?

Havyarimana Claver, Maniragarura Nestor, "Performance Investigation of Digital Optical Phase Conjugation-based Optical Switch," SSRG International Journal of Applied Physics, vol. 12,  no. 1, pp. 1-5, 2025. Crossref, https://doi.org/10.14445/23500301/IJAP-V12I1P101

Abstract:

The performance of an optical switch based on Digital Optical Phase Conjugation (DOPC) is investigated. By numerical simulations using the Finite Difference Time Domain (FDTD) method, the operation of the optical switch is demonstrated, and Insertion Loss (IL) and Crosstalk (CT) are evaluated over a range of wavelengths for both Transverse Electric (TE) and Transverse Magnetic (TM) polarizations. The switch is designed utilizing the DOPC technique and incorporates a Multimode Interferometer (MMI) coupler and Distributed Bragg Gratings (DBG) mirrors/filters. Simulation results reveal that these switches exhibit wide bandwidth, low polarization-dependent loss, and compact size. The minimum insertion loss and crosstalk for a single-wavelength switch are 0.45 dB at 1560 nm and -17.5 dB, respectively. For a forward DOPC switch, these values are 0.64 dB and -16.5 dB at 1550 nm. The switch is wavelength selective, with performance limited by the selectivity of the DBG filter, which must have a narrow bandwidth of 0.8 nm for the Dense Wavelength Division Multiplexing system.

Keywords:

Optical switch, Digital Optical Phase Conjugation, Finite difference time domain.

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