| 2 | Silicon photonics phase and intensity modulators for flat frequency comb generation显示文摘Flat electro-optical frequency combs play an important role in a wide range of applications,such as metrology,spectroscopy,or microwave photonics.As a key technology for the integration of optical circuits,silicon photonics could benefit from on-chip,tunable,flat frequency comb generators.In this article,two different architectures based on silicon modulators are studied for this purpose.They rely on a time to frequency conversion principle to shape the comb envelope.Using a numerical model of the silicon traveling-wave phase modulators,their driving schemes are optimized before their performances are simulated and compared.A total of nine lines could be obtained within a 2 dB flatness,with a line-spacing ranging from 0.1 to 7 GHz.Since this tunability is a major asset of electro-optical frequency combs,the effect of segmenting the phase modulators is finally investigated,showing that the flat lines spacing could be extended up to 39 GHz by this method. | LUCAS DENIEL ERWAN WECKENMANN DIEGO PÉREZ GALACHO CHRISTIAN LAFFORGUE STÉPHANE MONFRAY CARLOS ALONSO-RAMOS LAURENT BRAMERIE FRÉDÉRIC BOEUF LAURENT VIVEN DELPHINE MARRIS-MORINI | 2021 | Photonics Research2021，9，10： | 1 |
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