Abstract

CALVO-SALCEDO, Andrés F.; GUERRERO-GONZALEZ, Neil  and  JARAMILLO-VILLEGAS, José A.. Multi-Tone Optical Source Generation for Applications in Next-Generation Passive Optical Networks using Photonic Structures. Ing. Investig. [online]. 2023, vol.43, n.2, pp.1-.  Epub Apr 17, 2024. ISSN 0120-5609.  https://doi.org/10.15446/ing.investig.98975.

This study presents the design and simulation of an integrated multi-carrier optical source with a 227 GHz bandwidth for passive optical network (PON) applications. The optical comb generation attained using a photonic structure known as a micro-ring resonator fabricated in silicon nitride (Si3N4) facilitates cost reduction when produced on a large scale. Additionally, the generated optical comb accomplishes non-uniform tones in terms of the optical signal-to-noise ratio (OSNR), which allows for the dynamic assignment of carriers to retainable customers as a function of the data rate and transmission distance requirements. The design and simulation demonstrate the generation of frequency combs with optical carriers in a range of 5-40 tones, an OSNR range of 20-80 dB, and a free spectral range (FSR) of 50-3 610 GHz. To achieve these features, a geometric design of the device is proposed, and its response to variations of input laser parameters is described. In summary, the device uses two optical micro-resonators with radii of 100 and 450 pm and controls the power and the tuning of laser parameters. The proposed method allows generating a deterministic and reliable path to the frequency combs. Finally, the characteristics of the obtained combs are tested to determine their potential use in PON transmissions.

Keywords : next-generation PON; micro-ring resonator; frequency combs; optical communications.

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