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Lithium Niobate Michelson Interferometer Modulator on Silicon-On-Insulator Platform

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arxiv 1905.01623 v1 pith:ZIXS4PUH submitted 2019-05-05 physics.app-ph

Lithium Niobate Michelson Interferometer Modulator on Silicon-On-Insulator Platform

classification physics.app-ph
keywords modulatorefficiencylithiummodulationsilicondemonstratesdevicegbit
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We propose and demonstrate a hybrid silicon and lithium niobate Michelson Interferometer Modulator (MIM) with enhanced modulation efficiency compared to a Mach-Zehnder modulator. The modulator is based on seamless integration of a high-contrast waveguide based on lithium niobate-a popular modulator material-with compact, low-loss silicon circuitry. The present device demonstrates a modulation efficiency as high as 1.2 Vcm and a low insertion loss of 3.3 dB. The 3dB electro-optic bandwidth is approximately 17.5 GHz. The optical eye diagrams, operating at 32 Gbit/s and 40 Gbit/s, with measured dynamic extinction ratios at 8 dB and 6.6 dB respectively. The present device avoids absorption loss and nonlinearity in conventional silicon modulators and demonstrates highest modulation efficiency in LN modulators, showing potential in future optical interconnects.

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