Chisa cha ma frequency optical ndi sipekitiramu yopangidwa ndi zigawo zingapo zofananira pafupipafupi pa sipekitiramu, zomwe zimatha kupangidwa ndi ma laser otsekeka, ma resonator, kapenama electro-optical modulators. Kuwala pafupipafupi zisa kwaiyeelectro-optic modulatorsali ndi mawonekedwe obwerezabwereza pafupipafupi, kuyanika kwamkati ndi mphamvu zambiri, ndi zina zambiri, zomwe zimagwiritsidwa ntchito kwambiri pakuwongolera zida, mawonekedwe azithunzi, kapena sayansi yoyambira, ndipo zakopa chidwi cha ofufuza ambiri m'zaka zaposachedwa.
Posachedwapa, a Alexandre Parriaux ndi ena ochokera ku yunivesite ya Burgendi ku France adasindikiza ndemanga m'magazini yotchedwa Advances in Optics and Photonics, kufotokoza mwadongosolo kafukufuku waposachedwa kwambiri komanso kugwiritsa ntchito zisa zafupipafupi zomwe zimapangidwa ndielectro-optical modulation: Zimaphatikizapo kukhazikitsidwa kwa chisa cha pafupipafupi, njira ndi mawonekedwe a chisa cha pafupipafupi chopangidwa ndielectro-optic modulator, ndipo potsirizira pake amatchula zochitika zogwiritsira ntchitoelectro-optic modulatorkuwala kwafupipafupi chipeso mwatsatanetsatane, kuphatikizapo kagwiritsidwe ntchito ka sipekitiramu yolondola, kusokoneza kwawiri kwa chisa, kusanja kwa zida ndi kutulutsa mafunde motsatizana, ndikukambirana mfundo zomwe zimagwira ntchito zosiyanasiyana. Pomaliza, wolembayo akupereka chiyembekezo chaukadaulo wa electro-optic modulator optical frequency comb.
01 Mbiri
Panali zaka 60 zapitazo mwezi uno pamene Dr. Maiman anapanga laser yoyamba ya ruby. Zaka zinayi pambuyo pake, Hargrove, Fock ndi Pollack a Bell Laboratories ku United States anali oyamba kunena za kutsekeka komwe kumachitika mu ma lasers a helium-neon, mawonekedwe otsekera a laser mu nthawi yanthawiyo amaimiridwa ngati kutulutsa kwamphamvu, m'magawo afupipafupi pali mizere yayifupi komanso yofanana, yofanana kwambiri ndi momwe timagwiritsira ntchito zisa tsiku ndi tsiku, kotero timatcha sipekitiramu "optical frequency comb". Amatchedwa "optic frequency chisa".
Chifukwa cha chiyembekezo chogwiritsa ntchito bwino chisa cha optical, Mphotho ya Nobel mu Fizikisi mu 2005 idaperekedwa kwa Hansch ndi Hall, omwe adachita upainiya paukadaulo waukadaulo wa optical comb, kuyambira pamenepo, chitukuko cha chisa chamaso chafika pamlingo wina watsopano. Chifukwa ntchito zosiyanasiyana zimakhala ndi zofunikira zosiyanasiyana za zisa zowoneka bwino, monga mphamvu, malo otalikirana ndi mizere ndi kutalika kwapakati, izi zapangitsa kuti pakufunika kugwiritsa ntchito njira zosiyanasiyana zoyesera kuti apange zisa za kuwala, monga ma laser otsekeka, ma micro-resonator ndi electro-optical. modulator.
CHITH. 1 Sipekitiramu yanthawi yayitali komanso ma frequency domain sipekitiramu ya optical frequency chisa
Gwero la zithunzi: Electro-optic frequency zisa
Chiyambireni kupezeka kwa zisa za ma frequency optical, zisa zambiri zowoneka pafupipafupi zapangidwa pogwiritsa ntchito ma laser otsekeka. Mu ma lasers otsekedwa, phokoso lokhala ndi nthawi yozungulira τ limagwiritsidwa ntchito kukonza mgwirizano wapakati pakati pa mitundu yayitali, kuti mudziwe kuchuluka kwa kubwereza kwa laser, komwe kungakhale kuchokera ku megahertz (MHz) kupita ku gigahertz ( GHz).
Chisa chafupipafupi chopangidwa ndi micro-resonator chimatengera zotsatira zopanda malire, ndipo nthawi yozungulira yozungulira imatsimikiziridwa ndi kutalika kwa micro-cavity, chifukwa kutalika kwa micro-cavity nthawi zambiri kumakhala kosakwana 1mm, ma frequency owoneka. Chisa chopangidwa ndi micro-cavity nthawi zambiri chimakhala 10 gigahertz mpaka 1 terahertz. Pali mitundu itatu yodziwika bwino ya microcavities, microtubules, microspheres ndi microrings. Pogwiritsa ntchito zotsatira zopanda malire muzitsulo za kuwala, monga Brillouin kufalitsa kapena kusakanikirana kwa mafunde anayi, kuphatikizapo ma microcavities, zisa za optical frequency mu makumi a nanometers zimatha kupangidwa. Kuphatikiza apo, zisa zowoneka pafupipafupi zitha kupangidwanso pogwiritsa ntchito ma modulator ena acousto-optic.
Nthawi yotumiza: Dec-18-2023