{"622338":{"#nid":"622338","#data":{"type":"news","title":"Georgia Tech Led International Team Files Provisional Patent - Microwave photonics: A simple and tunable photonic microwave source","body":[{"value":"\u003Cp\u003EMicrowave photonics are of intense interest in fields such as radar and phased-array antennas due to the low loss and high-bandwidth properties, immunity to electromagnetic interference (EMI), tunability, and reconfigurability. In a collaborative effort between the Georgia Institute of Technology in Atlanta, Georgia Tech Lorraine, and ITMO University, Saint Petersburg, Russia, a provisional patent for \u0026ldquo;Simple stable X-band tunable microwave generator\u0026rdquo; by Electrical and Computer Engineering graduate student Michael Wishon, Adjunct Professor Alexandre Locquet (GTL-ECE), Professor David Citrin (GT-ECE), and Evgeny Viktorov (ITMO) was filed.\u003C\/p\u003E\r\n\r\n\u003Cp\u003EThe design is based on the research team\u0026rsquo;s earlier work on using optical feedback provided by a partially reflecting distant mirror from a laser diode\u0026rsquo;s output facet to induce spontaneous and undamped relaxation oscillations that modulate the laser\u0026rsquo;s optical output.\u0026nbsp; The addition of another optoelectronic feedback loop, together with phase control of the feedback light, is shown to suppress phase noise.\u003C\/p\u003E\r\n\r\n\u003Cp\u003ESuch photonic microwave oscillators are of interest for optical clock distribution, radio over fiber, and satellite communications.\u0026nbsp; The devices that are conceptualized in this provisional patent are frequency tunable across the X-band (by changing the injection current), have small footprint and simple architecture. In addition, one can take as the output a purely microwave electrical signal from the injection terminals of the device.\u003C\/p\u003E\r\n\r\n\u003Cp\u003E(U.S. Serial No.\u0026nbsp;62\/836,318)\u003C\/p\u003E\r\n","summary":null,"format":"limited_html"}],"field_subtitle":"","field_summary":"","field_summary_sentence":[{"value":"Such photonic microwave oscillators are of interest for optical clock distribution, radio over fiber, and satellite communications."}],"uid":"27863","created_gmt":"2019-06-07 17:19:55","changed_gmt":"2019-06-07 17:19:55","author":"Christa Ernst","boilerplate_text":"","field_publication":"","field_article_url":"","dateline":{"date":"2019-06-07T00:00:00-04:00","iso_date":"2019-06-07T00:00:00-04:00","tz":"America\/New_York"},"extras":[],"groups":[{"id":"213791","name":"3D Systems Packaging Research Center"},{"id":"198081","name":"Georgia Electronic Design Center (GEDC)"},{"id":"197261","name":"Institute for Electronics and Nanotechnology"},{"id":"1271","name":"NanoTECH"},{"id":"213771","name":"The Center for MEMS and Microsystems Technologies"}],"categories":[{"id":"129","name":"Institute and Campus"}],"keywords":[{"id":"181488","name":"CItrin"},{"id":"12701","name":"Institute for Electronics and Nanotechnology"},{"id":"1925","name":"Electrical and Computer Engineering"},{"id":"181489","name":"microwave photonics"},{"id":"181490","name":"radio-over-fiber"},{"id":"3748","name":"communication"},{"id":"62881","name":"phased array radar"}],"core_research_areas":[{"id":"39451","name":"Electronics and Nanotechnology"},{"id":"39481","name":"National Security"}],"news_room_topics":[],"event_categories":[],"invited_audience":[],"affiliations":[],"classification":[],"areas_of_expertise":[],"news_and_recent_appearances":[],"phone":[],"contact":[{"value":"\u003Cp\u003EChrista Ernst\u003Cbr \/\u003E\r\nchrista.ernst@ien.gatech.edu\u003C\/p\u003E\r\n","format":"limited_html"}],"email":[],"slides":[],"orientation":[],"userdata":""}}}