Compact Brillouin devices through hybrid integration on silicon
Date
2017
Authors
Morrison, Blair
Bedoya, Alvaro Casas
Ren, Guanghui
Vu, Khu
Liu, Yang
Zarifi, Atiyeh
Nguyen, Thach
Choi, Duk
Marpaung, David
Madden, Steve
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Volume Title
Publisher
Optical Society of American (OSA)
Abstract
A range of unique capabilities in optical and microwave signal processing and generation have been demonstrated using stimulated Brillouin scattering (SBS). The need to harness SBS in mass-manufacturable integrated circuits has led to a focus on silicon-based material platforms. Remarkable progress in silicon-based Brillouin waveguides has been made, but results have been hindered by nonlinear losses present at telecommunications wavelengths. Here, we report on a new approach to surpass this issue through the integration of a high Brillouin gain material, As2S3As2S3, onto a silicon-based chip. We fabricated a compact spiral device within a silicon circuit, achieving an order-of-magnitude improvement in Brillouin amplification. To establish the flexibility of this approach, we fabricated a ring resonator with free spectral range precisely matched to the Brillouin shift, enabling the first demonstration, to our knowledge, of Brillouin lasing in a planar integrated circuit. Combining active photonic components with the SBS devices shown here will enable the creation of compact, mass-manufacturable optical circuits with enhanced functionalities.
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Source
Optica
Type
Journal article