A cikin 'yan shekarun nan, masu bincike daga kasashe daban-daban sun yi amfani da haɗe-haɗen photonics don cimma nasarar sarrafa sarrafa igiyoyin hasken infrared tare da amfani da su zuwa cibiyoyin sadarwar 5G masu sauri, na'urori masu auna sigina, da motoci masu cin gashin kansu. A halin yanzu, tare da ci gaba da zurfafa wannan jagorar bincike, masu bincike sun fara aiwatar da zurfin gano gajarta haske mai haske da haɓaka ƙarin aikace-aikace masu fa'ida, kamar LIDAR matakin guntu, AR / VR / MR (inganta / Virtual / matasan) Gaskiya) Gilashin, nunin holographic, kwakwalwan sarrafa adadi, binciken optogenetic da aka dasa a cikin kwakwalwa, da sauransu.
Babban haɗe-haɗe na masu gyara lokaci na gani shine ginshiƙi na tsarin tsarin gani don kewayawa na gani akan guntu da siffata gaban igiyar igiyar sarari kyauta. Waɗannan ayyuka na farko guda biyu suna da mahimmanci don gane aikace-aikace iri-iri. Koyaya, ga masu daidaita yanayin lokaci na gani a cikin kewayon hasken da ake iya gani, yana da ƙalubale musamman don biyan buƙatun babban watsawa da haɓakar haɓakawa a lokaci guda. Don saduwa da wannan buƙatun, har ma mafi dacewa silicon nitride da kayan lithium niobate suna buƙatar ƙara girma da amfani da wutar lantarki.
Don magance wannan matsala, Michal Lipson da Nanfang Yu na Jami'ar Columbia sun ƙera wani na'ura mai sarrafa siliki nitride thermo-optic modulator dangane da resonator micro-ring resonator. Sun tabbatar da cewa resonator micro-ring yana aiki a cikin yanayin haɗin gwiwa mai ƙarfi. Na'urar zata iya cimma daidaiton lokaci tare da ƙarancin asara. Idan aka kwatanta da na yau da kullun na masu daidaita yanayin waveguide, na'urar tana da aƙalla tsari na rage girman sararin samaniya da amfani da wutar lantarki. An buga abubuwan da ke da alaƙa a cikin Nature Photonics.
Michal Lipson, babban kwararre a fannin haɗe-haɗen photonics, dangane da silicon nitride, ya ce: "Makullin maganin da muke samarwa shine amfani da na'urar resonator na gani da kuma aiki a cikin abin da ake kira ƙaƙƙarfan yanayin haɗin gwiwa."
Resonator na gani wani tsari ne mai ma'ana sosai, wanda zai iya juyar da ƙaramin jujjuyawar juzu'i zuwa canjin lokaci ta hanyar zagayowar fitilun haske. Gabaɗaya, ana iya raba shi zuwa jihohin aiki daban-daban guda uku: “ƙarƙashin haɗaɗɗiya” da “ƙarƙashin haɗin gwiwa.” Haɗin kai mai mahimmanci" da "ƙarfin haɗin gwiwa." Daga cikin su, "ƙarƙashin haɗin kai" na iya samar da ƙayyadaddun tsarin lokaci kawai kuma zai gabatar da sauye-sauyen girman da ba dole ba, kuma "mahimman haɗin kai" zai haifar da hasara mai yawa, ta haka zai shafi ainihin aikin na'urar.
Don cimma cikakkiyar gyare-gyaren lokaci na 2π da ƙaramin canji mai girma, ƙungiyar bincike ta sarrafa microring a cikin yanayin "ƙarfin haɗin gwiwa". Ƙarfin haɗin kai tsakanin microring da "bas" ya kai aƙalla sau goma fiye da asarar microring. Bayan jerin zane-zane da haɓakawa, ana nuna tsarin ƙarshe a cikin hoton da ke ƙasa. Wannan zobe ne mai resonant tare da faɗin maɗauri. Ƙaƙƙarfan ɓangaren jagorar igiyar ruwa yana inganta ƙarfin haɗin kai tsakanin "bas" da ƙananan na'ura. Faɗin ɓangaren waveguide Ana rage asarar hasken microring ta hanyar rage watsawar gani na bangon gefe.
Heqing Huang, mawallafin jaridar na farko, ya kuma ce: “Mun ƙirƙira ƙaramin ƙaramin ƙarfi, ceton makamashi, da ƙarancin asara mai iya gani na lokaci mai haske tare da radius na 5μm kawai da kuma π-lokaci na amfani da wutar lantarki kawai. 0.8mW. Bambancin amplitude da aka gabatar bai wuce 10% ba. Abin da ya fi wuya shi ne cewa wannan na'ura mai daidaitawa daidai yake da tasiri ga mafi wuyar maƙallan shuɗi da kore a cikin bakan da ake iya gani."
Nanfang Yu ya kuma yi nuni da cewa, ko da yake sun yi nisa da kai matakin hadewar kayayyakin lantarki, amma aikinsu ya takaita gibin da ke tsakanin na'urorin na'urar daukar hoto da na'urorin lantarki. "Idan fasahar modulator da ta gabata kawai ta ba da damar haɗin kai na masu daidaitawa lokaci guda 100 da aka ba da wani takamaiman sawun guntu da kasafin wutar lantarki, to yanzu za mu iya haɗa masu canjin lokaci na 10,000 akan guntu ɗaya don cimma ƙarin aiki mai rikitarwa."
A taƙaice, ana iya amfani da wannan hanyar ƙira ga masu amfani da wutar lantarki don rage sararin samaniya da kuma amfani da wutar lantarki. Hakanan za'a iya amfani da shi a cikin wasu jeri na gani da sauran ƙirar resonator daban-daban. A halin yanzu, ƙungiyar bincike tana haɗin kai don nuna alamar LIDAR da ke bayyane wanda ya ƙunshi tsararrun canjin lokaci dangane da irin waɗannan microrings. A nan gaba, ana iya amfani da shi ga aikace-aikace da yawa kamar haɓakar rashin daidaituwa na gani, sabbin lasers, da sabbin na'urori masu gani na gani.
Tushen labarin:https://mp.weixin.qq.com/s/O6iHstkMBPQKDOV4CoukXA
Beijing Rofea Optoelectronics Co., Ltd. dake cikin "Silicon Valley" na kasar Sin - Beijing Zhongguancun, wani babban kamfani ne na fasaha da aka sadaukar don hidimar cibiyoyin bincike na gida da na waje, cibiyoyin bincike, jami'o'i da ma'aikatan binciken kimiyya na masana'antu. Kamfaninmu ya fi tsunduma cikin bincike mai zaman kansa da haɓakawa, ƙira, masana'antu, tallace-tallace na samfuran optoelectronic, kuma yana ba da sabbin hanyoyin warwarewa da ƙwararru, keɓaɓɓen sabis don masu binciken kimiyya da injiniyoyin masana'antu. Bayan shekaru masu tasowa masu zaman kansu, ya samar da samfurori masu kyau da cikakke na samfurori na photoelectric, waɗanda aka yi amfani da su sosai a cikin gundumomi, soja, sufuri, wutar lantarki, kudi, ilimi, likita da sauran masana'antu.
Muna fatan samun haɗin gwiwa tare da ku!
Lokacin aikawa: Maris 29-2023