Kodi ma electro-optic modulator optical frequencycomb ndi chiyani?Gawo Loyamba

Chisa cha ma frequency optical ndi sipekitiramu yopangidwa ndi zigawo zingapo zofananira pafupipafupi pa sipekitiramu, zomwe zimatha kupangidwa ndi ma laser otsekeka, ma resonator, kapenaelectro-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 helium-neon lasers, mawonekedwe otsekera a laser mu nthawi yanthawi imayimiridwa ngati kutulutsa kwamphamvu, pama frequency ndi mizere yayifupi komanso yofananira, yofanana kwambiri ndi ma combs amasiku onse, omwe timawagwiritsa ntchito tsiku ndi tsiku. 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 za kuwala, monga mphamvu, malo otsetsereka a mzere ndi kutalika kwapakati, izi zapangitsa kuti pakhale kufunikira kogwiritsa ntchito njira zosiyanasiyana zoyesera kuti apange zisa za kuwala, monga ma laser mode-lock, micro-resonators 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, patsekeke yokhala ndi nthawi yozungulira ya τ imagwiritsidwa ntchito kukonza mgwirizano wagawo pakati pa mitundu yayitali, kuti mudziwe kuchuluka kwa kubwereza kwa laser, komwe kumatha kukhala kuchokera ku megahertz (MHz) kupita ku gigahertz (GHz).

The kuwala pafupipafupi chisa kwaiye ndi yaying'ono resonator zachokera zotsatira nonlinear, ndipo ulendo wozungulira nthawi zimatsimikiziridwa ndi kutalika kwa micro-cavity, chifukwa kutalika kwa yaying'ono mphako zambiri zosakwana 1mm, chisa chapafupi kuwala kwaiye micro-cavity zambiri 10 gigahertz kuti 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 acousto-optic modulators.