Abstract
Research thrusts in silicon photonics are developing control operations using higher order waveguide modes for next generation high-bandwidth communication systems. In this context, devices allowing optical processing of multiple waveguide modes can reduce architecture complexity and enable flexible on-chip networks. We propose and demonstrate a hybrid resonator dually resonant at the 1st and 2nd order modes of a silicon waveguide. We observe 8 dB extinction ratio and modal conversion range of 20 nm for the 1st order quasi-TE mode input.
Highlights
Integrated photonics has dramatically evolved in the past decades and is a major enabling technology for applications ranging from sensing to optical interconnects and integrated quantum computing [1,2,3]
We propose and demonstrate a hybrid resonator dually resonant at the 1st and 2nd order modes of a silicon waveguide
For such application, extinction ratios higher than the demonstrated 8 dB are desired
Summary
Integrated photonics has dramatically evolved in the past decades and is a major enabling technology for applications ranging from sensing to optical interconnects and integrated quantum computing [1,2,3]. Proposed multimode architectures have been mostly based on single mode components combined with mode converters [8,12]. This approach benefits from the advancements in single mode devices, but at the cost of complexity and footprint size. As the number of spatial and spectral channels scales up so does the required number of components, but at a much faster rate In this scenario, components that facilitate active optical processing of different transversal modes could have an important impact in reducing complexity and increasing flexibility for future MDM networks on a chip. The fabricated device is resonant at the 1st (TE0) and 2nd (TE1) guided modes
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