Journal
APL PHOTONICS
Volume 6, Issue 3, Pages -Publisher
AIP Publishing
DOI: 10.1063/5.0033516
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Funding
- Australian Research Council (ARC) through ARC DECRA [DE150101535]
- Australian Research Council (ARC) [FL120100029]
- Australian Research Council (ARC) through Center of Excellence CUDOS [CE110001018]
- Netherlands Organisation for Scientific Research (NWO) [15702, 740.018.021]
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Optical modulation plays a crucial role in microwave photonic systems, but the versatility to generate and transform analog optical modulation is currently lacking. Researchers have demonstrated a versatile radiofrequency photonic spectral shaper integrated in a silicon photonic circuit, which enhances the diversity of microwave photonic modulation. Using the spectral shaper, researchers showed electrically tailorable modulation transformations and a series of unprecedented RF filtering experiments through monolithic integration with reconfigurable ring resonators.
Optical modulation plays arguably the utmost important role in microwave photonic (MWP) systems. Precise synthesis of modulated optical spectra dictates virtually all aspects of MWP system quality including loss, noise figure, linearity, and types of functionalities that can be executed. However, for such a critical function, the versatility to generate and transform analog optical modulation is severely lacking, blocking the pathways to truly unique MWP functions including ultra-linear links and low-loss high rejection filters. Here, we demonstrate a versatile radiofrequency (RF) photonic spectral shaper integrated in a silicon photonic circuit. The spectral shaper controls the two modulation bands generated from an electro-optic modulation process in their relative amplitude and phase, offering an enhanced versatility for microwave-photonic modulation applications. Using the spectral shaper, we show electrically tailorable modulation transformations. Furthermore, we show a series of unprecedented RF filtering experiments through monolithic integration of the spectral shaper with a network of reconfigurable ring resonators.
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