High parametric efficiency in laser cavity-soliton microcombs

Antonio Cutrona

doi:10.1364/OE.470376

High parametric efficiency in laser cavity-soliton microcombs

2022-10-12

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Juan Sebastian Totero Gongora

DOI：10.1364/OE.470376

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Laser cavity-soliton microcombs are robust optical pulsed sources, usually im-plemented with a microresonator-filtered fibre laser. In such a configuration, a nonlinear microcavity converts the narrowband pulse resulting from bandwidth-limited amplification to a background-free broadband microcomb. Here, we theoretically and experimentally study the soliton conversion efficiency between the narrowband input pulse and the two outputs of a four-port integrated microcavity, namely the 'Drop' and 'Through' ports. We simultaneously measure on-chip, single-soliton conversion efficiencies of 45% and 25% for the two broadband comb outputs at the 'Drop' and 'Through' ports of a 48.9 GHz free-spectral range micro-ring resonator, obtaining a total conversion efficiency of 72%.

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High parametric efficiency in laser cavity-soliton microcombs

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