期刊
OPTICA
卷 6, 期 9, 页码 1117-1123出版社
OPTICAL SOC AMER
DOI: 10.1364/OPTICA.6.001117
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资金
- National Science Foundation (NSF) [DGE1122492]
- David and Lucile Packard Foundation
- Sandia National Laboratories [DE-NA-0003525]
The ability to amplify light within silicon waveguides is central to the development of high-performance silicon photonic device technologies. To this end, the large optical nonlinearities made possible through stimulated Brillouin scattering offer a promising avenue for power-efficient all-silicon amplifiers, with recent demonstrations producing several dB of net amplification. However, scaling the degree of amplification to technologically compelling levels (> 10 dB), necessary for everything from filtering to small signal detection, remains an important goal. Here, we significantly enhance the Brillouin amplification process by harnessing an intermodal Brillouin interaction within a multi-spatial-mode silicon racetrack resonator. Using this approach, we demonstrate more than 20 dB of net Brillouin amplification in silicon, advancing state-of-the-art performance in silicon waveguides by a factor of 30. This level of amplification is achieved with modest (similar to 15 mW) continuous-wave pump powers and produces low out-of-band noise. Moreover, we show that this same system behaves as a unidirectional amplifier, providing more than 28 dB of optical nonreciprocity without insertion loss in an all-silicon platform. Building on these results, this device concept opens the door to new types of all-silicon injection-locked Brillouin lasers, high-performance photonic filters, and waveguide-compatible distributed optomechanical phenomena. (C) 2019 Optical Society of America under the terms of the OSA Open Access Publishing Agreement
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