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<p>This piece of work develops an analytical model for an arrayed waveguide grating (AWG)-based wavelength-selective switch-based reconfigurable optical add/drop multiplexer (WSS-ROADM) typically deployed in a wavelength division multiplexed (WDM) Metro-access ring. The objective is to conduct the routing operation on rather low-speed 1.25Gbps data channels without using amplifiers in a small metro network for short links. It proposes a holistic spectral/spatial/spectral domain mapping technique by integrating the spectral/ spatial and spatial/ spectral while utilizing the Laser Lorentzian emission spectrum and the Gaussian Far-field intensity (GFI) profile of AWG on the input channels. The illustrated approach examines the emission spectra of the WSS’s constituent wavelength channels of the WDM signal output port through physical layer impairments such as insertion and routing loss and inter-channel crosstalk (ICC) in the AWG elements. Numerical analysis provides intuition into the significance of several system variables like laser line width (LW), frequency channel spacing, and AWG’s free spectral range (FSR) on the routing characteristics of a WSS-ROADM servicing low-speed data channels. The illustrated algorithm has been experiencing better routing characteristics with varying LW and BER reflecting a signal loss of 6.5366&#xa0;dB and 8.0209&#xa0;dB, ICC of − 25.7651&#xa0;dB and − 7.8339&#xa0;dB, BER of 0.0001 × 10<sup>−6</sup> and 0.4370 respectively compared to the conventional spectral/ spatial or spatial/ spectral approaches., hence, it is a novel effort in this direction.</p>

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Transmission Characteristics of an AWG-Based Wavelength-Selective Switch Employed in a Small Metro-Edge ROADM

  • 期刊论文

  • 发表日期：

    2025年5月17日

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  • Suraj Kumar Naik,
  • Hemanta Kumar Palo

摘要

This piece of work develops an analytical model for an arrayed waveguide grating (AWG)-based wavelength-selective switch-based reconfigurable optical add/drop multiplexer (WSS-ROADM) typically deployed in a wavelength division multiplexed (WDM) Metro-access ring. The objective is to conduct the routing operation on rather low-speed 1.25Gbps data channels without using amplifiers in a small metro network for short links. It proposes a holistic spectral/spatial/spectral domain mapping technique by integrating the spectral/ spatial and spatial/ spectral while utilizing the Laser Lorentzian emission spectrum and the Gaussian Far-field intensity (GFI) profile of AWG on the input channels. The illustrated approach examines the emission spectra of the WSS’s constituent wavelength channels of the WDM signal output port through physical layer impairments such as insertion and routing loss and inter-channel crosstalk (ICC) in the AWG elements. Numerical analysis provides intuition into the significance of several system variables like laser line width (LW), frequency channel spacing, and AWG’s free spectral range (FSR) on the routing characteristics of a WSS-ROADM servicing low-speed data channels. The illustrated algorithm has been experiencing better routing characteristics with varying LW and BER reflecting a signal loss of 6.5366 dB and 8.0209 dB, ICC of − 25.7651 dB and − 7.8339 dB, BER of 0.0001 × 10−6 and 0.4370 respectively compared to the conventional spectral/ spatial or spatial/ spectral approaches., hence, it is a novel effort in this direction.