Highly tunable microwave and millimeter wave filtering using photonic technology

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DOIResolve DOI: http://doi.org/10.1117/1.OE.54.5.057102
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TypeArticle
Journal titleOptical Engineering
ISSN0091-3286
Volume54
Issue5
Article number57102
SubjectBandwidth; Bragg gratings; Fiber Bragg gratings; Microwaves; Millimeter waves; Photonics; Fabrication errors; Manufacturing process; Operating frequency; Photonic microwave filters; Photonic technologies; Radiofrequency signals; Single-sideband modulators; Transmission fibers; Microwave filters
AbstractThe design for a photonic microwave filter tunable in both bandwidth and operating frequency is proposed and experimentally demonstrated. The circuit is based on a single sideband modulator used in conjunction with two or more transmission fiber Bragg gratings (FBGs) cascaded in series. It is demonstrated that the optical filtering characteristics of the FBGs are instrumental in defining the shape of the microwave filter, and the numerical modeling was used to optimize these characteristics. A multiphase-shift transmission FBG design is used to increase the dynamic range of the filter, control the filter ripple, and maximize the slope of the filter skirts. Initial measurements confirmed the design theory and demonstrated a working microwave filter with a bandwidth tunable from approximately 2 to 3.5 GHz and an 18 GHz operating frequency tuning range. Further work is required to refine the FBG manufacturing process and reduce the impact of fabrication errors.
Publication date
PublisherSPIE
LanguageEnglish
AffiliationNational Research Council Canada; Security and Disruptive Technologies
Peer reviewedYes
NPARC number21275763
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Record identifierfc59de80-52da-4baf-89a6-797108f207aa
Record created2015-07-14
Record modified2016-05-09
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