Abstract

Microring resonators (MRR) can be used as a selective filter for amplified optical frequency combs, to reduce the impact of broadband noise. This approach, called comb distillation, could be useful when amplifying low-power microcombs. Comb distillation can substantially reduce the required comb line optical-carrier-to-noise ratio (OCNR) needed to support optical communications. However, the understanding of noise characteristics after comb distillation in a communications system has not been thoroughly established. In this paper, we find closed form solutions for noise after distillation, and directly link this to achievable system signal-to-noise ratio (SNR), providing a method to assess the expected system performance when the distilling MRR device resonance bandwidth and coupling loss are changed. This can be used to predict the distillation-enabled increase in the number of usable lines of microcombs for superchannel transmission, and/or the number of spatial modes for space-division-multiplexing (SDM) systems based on a distilled microcomb.

Optimising microring resonator based optical frequency comb distillation for optical communications systems

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Opt. Express 30(11) 17836-17847 (2022)

Performance of chip-scale optical frequency comb generators in coherent WDM communications

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Air-gap Fabry–Pérot cavity filtered 30 nm broadband electro-optic frequency combs for high-order coherent communications

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On-chip Brillouin purification for frequency comb-based coherent optical communications

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Effect of a breather soliton in Kerr frequency combs on optical communication systems

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