[{"data":1,"prerenderedAt":-1},["ShallowReactive",2],{"doc-detail-84716-en":3,"doc-seo-84716-105":29,"detail-sidebar-cat-0-en-105":90},{"code":4,"msg":5,"data":6},0,"success",{"doc_id":7,"user_id":8,"nickname":9,"user_avatar":10,"doc_module":4,"category_id":11,"category_name":12,"doc_title":13,"doc_description":14,"doc_content":15,"file_id":16,"file_url":17,"file_type":18,"file_size":19,"view_count":4,"is_deleted":4,"is_public":20,"is_downloadable":20,"audit_status":20,"page_count":21,"language":22,"language_code":23,"site_id":24,"html_lang":23,"table_of_contents":25,"faqs":26,"seo_title":13,"seo_description":14,"update_tm":27,"read_time":28},84716,549758252649,"Ivy","https://ap-avatar.wpscdn.com/avatar/8000253669c5317157?_k=1778319167496531819",7,"Healthcare","Light Coils: MRI with Fully Optical Data and Power Transmission","Light Coils proposes a fully optical MRI receive architecture to overcome limits of dense high-channel receiver coil arrays. It replaces massive galvanic cabling by routing RF data, delivering front-end power, and implementing coil detuning optically using Mach–Zehnder modulators on a C-band carrier. Power-over-fiber uses a high-efficiency photovoltaic converter, while pulse-sequence-triggered optical paths control active detuning. Joint optimization of modulator bias, photonic power, and gain yields conventional-coil SNR at low optical inputs and comparable in vivo 3T single-channel brain imaging, with a scalable multi-channel approach via wavelength-division multiplexing.","arXiv :2607 .04211v1 [ ee ss . SP] 5 Jul 2026  \nLight Coils: MRI with Fully Optical Data and Power Transmission  \nZining Liu 1*†, Morteza Teymoori2*†, Jakob Gerlach 1 , Reza Aghabagheri 1 , Henning Helmers3 , Michael Bock 1 ,  \nC¸a˘glar Ataman2 , Ali Caglar ¨Ozen 1  \n1 Department of Diagnostic and Interventional Radiology, University of Freiburg, Killianstr. 5a, Freiburg, 79110, Baden-W¨urttemberg, Germany.  \n2 Department of Microsystems Engineering, University of Freiburg, Georges K¨ohler-Allee 102, Freiburg, 79110, Baden-W¨urttemberg,  \nGermany.  \n3 Department III-V Photovoltaics and Concentrator Technology,  \nFraunhofer Institute for Solar Energy Systems ISE, Heidenhofstr. 2, Freiburg, 79110, Baden-W¨urttemberg, Germany.  \n*Corresponding author(s). E-mail(s): [zining.liu@uniklinik-freiburg.de](zining.liu@uniklinik-freiburg.de) ;  \n[morteza.teymoori@imtek.uni-freiburg.de](morteza.teymoori@imtek.uni-freiburg.de) ; Contributing [authors: jakob.gerlach@uniklinik-freiburg.de](authors: jakob.gerlach@uniklinik-freiburg.de);  \n[reza.aghabagheri@uniklinik-freiburg.de](reza.aghabagheri@uniklinik-freiburg.de) ; [henning.helmers@ise.fraunhofer.de](henning.helmers@ise.fraunhofer.de) ; [michael.bock@uniklinik-freiburg.de](michael.bock@uniklinik-freiburg.de) ; [caglar.ataman@imtek.uni-freiburg.de](caglar.ataman@imtek.uni-freiburg.de) ; [ali.oezen@uniklinik-freiburg.de](ali.oezen@uniklinik-freiburg.de) ;  \n†These authors contributed equally to this work.  \nAbstract  \nIn magnetic resonance imaging (MRI) dense receiver coil arrays with a high number of coil elements are used to efficiently detect and encode the signal. Further increasing the number of coils is hampered by electrical cabling and massive electronics that introduce electromagnetic coupling, integration complexity and even safety constraints. Here we introduce the novel Light Coils concept, a fully optical MRI receive architecture, in which data transmission, front-end power delivery and coil detuning are all implemented optically, which allows reducing the massive galvanic cabling to a few optical fibers. For signal encoding, Mach–Zehnder modulators (MZM) are used to convert the preamplified RF signal from each  \n1  \ncoil onto a C-band optical carrier. The preamplifiers are driven via a powerover-fiber (PoF) system that uses a high-efficiency photovoltaic (PV) cell for optical-to-electrical power conversion. A pulse-sequence-triggered optical path controls active detuning. Jointly optimizing modulator bias, optical power and front-end gain under realistic receiver chain conditions, Light Coils can match the signal-to-noise ratio (SNR) of conventional RF coil systems with galvanic cables at MZM input powers of 5–10mW and photonic power converter inputs of 80-100mW. At a clinical 3 Tesla MRI system we show in vivo human brain imaging with a single-channel Light Coil element with an image quality and SNR comparable to a conventional coaxial readout using the identical coil element.  \nExtending the concept to a four-channel array using dense wavelength-division multiplexing over a single fiber, we demonstrate wavelength-selective routing with inter-channel optical isolation exceeding 28dB, reduced noise correlation compared with the galvanic reference, and parallel imaging. These results establish a scalable route towards lightweight, modular, and potentially ultra-dense MRI receive arrays based on integrated photonics and power-over-fiber.  \nKeywords: Magnetic Resonance Imaging (MRI), RF-over-Fiber, Power-over-fiber, RFCoil Array, Optical Signal and Power Transmission  \n1 Introduction  \nMagnetic resonance imaging (MRI) is a widely used non-invasive imaging modality that provides cross-sectional anatomical images with excellent soft-tissue contrast and functional information. It is also one of the most powerful tools available for investigating human brain structure and function. A persistent limitation of contemporary research and clinical MRI systems is the slow data acquisition,","cbCaibR655qLTP5g","https://ap.wps.com/l/cbCaibR655qLTP5g","pdf",10119364,1,37,"English","en",105,"# Abstract\n# Keywords\n# 1 Introduction","[{\"question\":\"What problem does the Light Coils concept address in dense MRI receiver arrays?\",\"answer\":\"Dense arrays are limited by extensive electrical cabling and electronics, which introduce electromagnetic coupling, integration complexity, and safety constraints such as RF-induced heating, while also harming SNR and parallel imaging due to cross-talk.\"},{\"question\":\"How does Light Coils transmit MRI signals and power optically?\",\"answer\":\"Light Coils converts each coil’s preamplified RF signal to a C-band optical carrier using Mach–Zehnder modulators, while delivering front-end power through a power-over-fiber system using a photovoltaic cell for optical-to-electrical conversion.\"},{\"question\":\"How is active coil detuning achieved in Light Coils?\",\"answer\":\"An optical path controlled by the MRI pulse sequence triggers active detuning, enabling coordination with the acquisition timing.\"}]",1784197812,93,{"code":4,"msg":30,"data":31},"ok",{"site_id":24,"language":23,"slug":32,"title":13,"keywords":33,"description":14,"schema_data":34,"social_meta":85,"head_meta":87,"extra_data":89,"updated_unix":27},"light-coils-mri-with-fully-optical-data-and-power-transmission","",{"@graph":35,"@context":84},[36,53,67],{"@type":37,"itemListElement":38},"BreadcrumbList",[39,43,47,50],{"item":40,"name":41,"@type":42,"position":20},"https://docshare.wps.com","Home","ListItem",{"item":44,"name":45,"@type":42,"position":46},"https://docshare.wps.com/document/","Document",2,{"item":48,"name":12,"@type":42,"position":49},"https://docshare.wps.com/document/healthcare/",3,{"item":51,"name":13,"@type":42,"position":52},"https://docshare.wps.com/document/light-coils-mri-with-fully-optical-data-and-power-transmission/84716/",4,{"url":51,"name":13,"@type":54,"author":55,"headline":13,"publisher":57,"fileFormat":60,"inLanguage":23,"description":14,"dateModified":61,"datePublished":61,"encodingFormat":60,"isAccessibleForFree":62,"interactionStatistic":63},"DigitalDocument",{"name":9,"@type":56},"Person",{"url":40,"name":58,"@type":59},"DocShare","Organization","application/pdf","2026-07-16",true,{"@type":64,"interactionType":65,"userInteractionCount":4},"InteractionCounter",{"@type":66},"ViewAction",{"@type":68,"mainEntity":69},"FAQPage",[70,76,80],{"name":71,"@type":72,"acceptedAnswer":73},"What problem does the Light Coils concept address in dense MRI receiver arrays?","Question",{"text":74,"@type":75},"Dense arrays are limited by extensive electrical cabling and electronics, which introduce electromagnetic coupling, integration complexity, and safety constraints such as RF-induced heating, while also harming SNR and parallel imaging due to cross-talk.","Answer",{"name":77,"@type":72,"acceptedAnswer":78},"How does Light Coils transmit MRI signals and power optically?",{"text":79,"@type":75},"Light Coils converts each coil’s preamplified RF signal to a C-band optical carrier using Mach–Zehnder modulators, while delivering front-end power through a power-over-fiber system using a photovoltaic cell for optical-to-electrical conversion.",{"name":81,"@type":72,"acceptedAnswer":82},"How is active coil detuning achieved in Light Coils?",{"text":83,"@type":75},"An optical path controlled by the MRI pulse sequence triggers active detuning, enabling coordination with the acquisition 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