Sub-gigahertz bandwidth all-optical tunable differentiator with high-energy efficiency based on a micro-ring resonator
Optics Letters, ISSN: 1539-4794, Vol: 49, Issue: 5, Page: 1341-1344
2024
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Article Description
We propose and demonstrate a tunable fractional-order photonic differentiator (DIFF) that can process input pulses with a sub-gigahertz bandwidth. Our scheme utilizes the self-induced optical modulation effect observed in a silicon-on-insulator micro-ring resonator. Gaussian-like pulses with varying pulse widths between 7.5 and 20 ns are employed for differentiation, achieving an energy efficiency over 45%, to the best of our knowledge, which surpasses all previously reported schemes for input pulses with a sub-gigahertz bandwidth. We simulate the temporal dynamics of pulses to gain insight into the physical mechanisms underlying the differentiated outputs and provide a method for differentiation order adjustment, which is experimentally realized using an all-optical pump–probe technique.
Bibliographic Details
http://www.scopus.com/inward/record.url?partnerID=HzOxMe3b&scp=85186349133&origin=inward; http://dx.doi.org/10.1364/ol.510770; http://www.ncbi.nlm.nih.gov/pubmed/38427008; https://opg.optica.org/abstract.cfm?URI=ol-49-5-1341; https://dx.doi.org/10.1364/ol.510770; https://opg.optica.org/ol/abstract.cfm?uri=ol-49-5-1341
Optica Publishing Group
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