Kulondola kwa muyeso wa kutalika kwa mafunde kuli mu dongosolo la kilohertz

Posachedwapa, gulu la akatswiri a yunivesite ya Guo Guangcan, Pulofesa Dong Chunhua, ndi mnzake Zou Changling, adapereka lingaliro la njira yowongolera kufalikira kwa micro-cavity, kuti akwaniritse kulamulira kodziyimira pawokha kwa ma frequency optical frequency comb center frequency ndi ma frequency obwerezabwereza, ndipo adagwiritsa ntchito poyesa molondola mafunde a kuwala, kulondola kwa muyeso wa mafunde kudakwera kufika pa kilohertz (kHz). Zomwe zapezekazi zidasindikizidwa mu Nature Communications.
Ma microcombs a Soliton ozikidwa pa ma microcavity a kuwala akope chidwi chachikulu pa kafukufuku m'magawo a ma spectroscopy olondola ndi mawotchi owonera. Komabe, chifukwa cha mphamvu ya phokoso la chilengedwe ndi laser komanso zotsatira zina zosalunjika mu microcavity, kukhazikika kwa soliton microcomb kuli kochepa kwambiri, zomwe zimakhala chopinga chachikulu pakugwiritsa ntchito bwino chisa chotsika. Mu ntchito yapitayi, asayansi adakhazikitsa ndikulamulira chisa chotsika cha kuwala mwa kulamulira index ya refractive ya zinthuzo kapena geometry ya microcavity kuti akwaniritse mayankho a nthawi yeniyeni, zomwe zidapangitsa kusintha kofanana mu ma resonance modes onse mu microcavity nthawi imodzi, osatha kuwongolera pafupipafupi komanso kubwerezabwereza kwa chisa. Izi zimalepheretsa kwambiri kugwiritsa ntchito chisa chotsika m'malo ochitira bwino a precision spectroscopy, ma microwave photons, optical ranging, ndi zina zotero.

Pofuna kuthetsa vutoli, gulu lofufuza linapereka njira yatsopano yogwirira ntchito kuti likwaniritse kayendetsedwe ka nthawi yeniyeni ka ma frequency apakati komanso ma frequency obwerezabwereza a chisa cha ma frequency optical. Mwa kuyambitsa njira ziwiri zosiyana zowongolera kufalikira kwa ma micro-cavity, gululi likhoza kuwongolera kufalikira kwa ma order osiyanasiyana a ma micro-cavity, kuti likwaniritse kuwongolera kwathunthu ma frequency osiyanasiyana a chisa cha ma frequency optical. Njira yoyendetsera kufalikira kwa ma dispersion iyi ndi yodziwika bwino pa nsanja zosiyanasiyana zophatikizika za photonic monga silicon nitride ndi lithiamu niobate, zomwe zaphunziridwa kwambiri.

Gulu lofufuza linagwiritsa ntchito laser yopompa ndi laser yothandizira kuti lizilamulira payokha njira zosiyanasiyana za ma orders a microcavity kuti lizindikire kukhazikika kwa ma frequency a pumping mode komanso malamulo odziyimira payokha a ma frequency repetition frequency. Kutengera ndi optical comb, gulu lofufuza linawonetsa malamulo ofulumira komanso okonzedwa a ma frequency a comb osasinthika ndipo linagwiritsa ntchito poyesa molondola kutalika kwa mafunde, kusonyeza wavemeter yokhala ndi kulondola kwa muyeso wa kilohertz komanso kuthekera koyesa ma wavelengths angapo nthawi imodzi. Poyerekeza ndi zotsatira za kafukufuku wakale, kulondola kwa muyeso komwe gulu lofufuza linapeza kwafika pa ma orders atatu akukula kwakukulu.

Ma microcombs a soliton omwe angakonzedwenso omwe awonetsedwa mu zotsatira za kafukufukuyu adakhazikitsa maziko okwaniritsa miyezo yotsika mtengo ya ma frequency optical, yomwe idzagwiritsidwa ntchito poyesa molondola, wotchi yowunikira, spectroscopy ndi kulumikizana.