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Reconfigurable multichannel amplitude equalizer based on cascaded silicon photonic microrings

Photonics Research 2023年第5期11卷 742-749页

作者： CHANGPING ZHANG SHUJUN LIU HAO YAN DAJIAN LIU LONG ZHANG HUAN LI YAOCHENG SHI LIU LIU DAOXIN DAI State Key Laboratory for Modern Optical Instrumentation Center for Optical&Electromagnetic ResearchCollege of Optical Science and EngineeringInternational Research Center for Advanced PhotonicsZhejiang UniversityZijingang CampusHangzhou 310058China ZJU-Hangzhou Global Scientific and Technological Innovation Center Hangzhou 311200China Ningbo Research Institute Zhejiang UniversityNingbo 315100China

A compact on-chip reconfigurable multichannel amplitude equalizer based on cascaded elliptical microrings is proposed and demonstrated *** the optimized structure of the elliptical microring with adiabatically varied radii/widths,the average excess loss for each channel in the initialized state is measured to be less than 0.5 d B,while the attenuation dynamic range can be over 20 d *** tunability through the overlapping of the resonance peaks of adjacent wavelength-channels enables even higher attenuation dynamic ranges up to50 d *** the thermo-optic effect and fine wavelength-tuning linearity,precise tuning of the resonance peak can be implemented,enabling dynamic power equalization of each wavelength-channel in wavelengthdivision-multiplexing(WDM)systems and optical frequency *** proposed architecture exhibits excellent scalability,which can facilitate the development of long-haul optical transport networks and high-capacity neuromorphic computing systems,while improving the overall performance of optical signals in WDM-related systems.

关键词： tuning multichannel microring

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Controllable Synthesis of CaCO_3 Micro/Nanocrystals with Different Morphologies in Microemulsion

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Chemical Research in Chinese Universities 2010年第5期26卷 678-682页

作者： YU Dong CHU Ying DONG Li-hong ZHUO Yu-jiang Department of Chemistry Northeast Normal University Changchun 130024 P. R. China Elementary Normal College Dalian University Dalian 116300 P. R. China

Lens-like vaterite CaCO3 microrings composed of CaCO3 nanoparticles were synthesized via a microemulsion-mediated route at room temperature with ethanol and n-hexanol as co-surfactant. This process did not demand any additional energy such as heating or continuous agitation. It was the first time to use ethanol as co-surfactant in the synthesis of micro or nanomaterials. And the ethanol was believed to play an important role in the aggregation fashion of CaCO3 nanoparticles. Moreover, shuttle-shaped nanorods, hexagonal nanoplates, and rice-like nanoparticles were also fabricated by modulating the growth parameters. Additionally, the introduce of ethanol into microemulsions as co-surfactant may be generalized as a novel green route to control the structure of other functional materials.

关键词： CaCO3 microring Cosurfactant

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