Daidaiton ma'aunin tsawon tsayi yana cikin tsari na kilohertz

Kwanan nan da aka samu labari daga Jami'ar Kimiyya da Fasaha ta China, ƙungiyar malamai ta jami'ar Guo Guangcan, Farfesa Dong Chunhua da abokin hulɗarta Zou Changling sun gabatar da wata hanyar sarrafa watsawa ta ƙananan ramuka ta duniya, don cimma ikon sarrafa mitar cibiyar tsefewar gani da mitar maimaitawa ta hanyar da ba ta da iyaka, kuma an yi amfani da ita wajen auna daidaiton tsawon ruwan tabarau, daidaiton ma'aunin tsawon ya karu zuwa kilohertz (kHz). An buga sakamakon binciken a cikin Nature Communications.
Ƙananan ƙwayoyin Soliton da aka gina bisa ƙananan ƙwayoyin gani sun jawo hankalin bincike sosai a fannonin daidaiton spectroscopy da agogon gani. Duk da haka, saboda tasirin hayaniyar muhalli da laser da ƙarin tasirin da ba na layi ba a cikin ƙananan ƙwayoyin, kwanciyar hankali na ƙananan ƙwayoyin soliton yana da iyaka sosai, wanda ya zama babban cikas ga aikace-aikacen aikace-aikacen ƙananan ƙwayoyin haske. A cikin ayyukan da suka gabata, masana kimiyya sun daidaita kuma sun sarrafa tsefewar mitar gani ta hanyar sarrafa ma'aunin refractive na kayan ko yanayin ƙananan ƙwayoyin don cimma ra'ayi na ainihi, wanda ya haifar da canje-canje kusan iri ɗaya a cikin duk yanayin resonance a cikin ƙananan ƙwayoyin a lokaci guda, ba su da ikon sarrafa mita da maimaita tsefe kai tsaye. Wannan yana iyakance amfani da tsefewar ƙananan ƙwayoyin haske a cikin yanayin aiki na daidaiton spectroscopy, microwave photons, kewayon gani, da sauransu.

Domin magance wannan matsala, ƙungiyar masu binciken ta gabatar da wani sabon tsari na zahiri don cimma daidaiton mitar tsakiya mai zaman kanta da kuma maimaita mitar mitar gani. Ta hanyar gabatar da hanyoyi guda biyu daban-daban na sarrafa watsawa ta ƙananan ramuka, ƙungiyar za ta iya sarrafa watsawa ta hanyoyi daban-daban na ƙananan ramuka da kanta, don cimma cikakken iko na mitar haƙori daban-daban na tsefewar mitar gani. Wannan tsarin daidaita watsawa ya zama ruwan dare ga dandamali daban-daban na photonic kamar silicon nitride da lithium niobate, waɗanda aka yi nazari sosai a kansu.

Ƙungiyar binciken ta yi amfani da na'urar laser mai famfo da kuma na'urar laser mai taimako don sarrafa yanayin sarari na tsari daban-daban na microcavity da kansu don cimma daidaiton yanayin famfo mai daidaitawa da kuma daidaita mitar maimaita mita. Dangane da na'urar hangen nesa, ƙungiyar binciken ta nuna saurin tsari, mai iya tsara mitoci na tsefe ba tare da wani tsari ba kuma ta yi amfani da shi don auna daidaiton tsayin raƙuman ruwa, tana nuna na'urar aunawa tare da daidaiton ma'aunin kilohertz da ikon auna tsawon tsayi da yawa a lokaci guda. Idan aka kwatanta da sakamakon binciken da ya gabata, daidaiton ma'auni da ƙungiyar binciken ta samu ya kai matakai uku na ci gaba da girma.

Ƙananan ƙwayoyin soliton da aka sake tsarawa da aka nuna a cikin wannan sakamakon bincike sun kafa harsashin aiwatar da ƙa'idodin mitar gani masu araha, waɗanda aka haɗa da guntu, waɗanda za a yi amfani da su a cikin ma'aunin daidaito, agogon gani, spectroscopy da sadarwa.