Yini i-electro-optic modulator optical frequency comb?Ingxenye yokuqala

I-optical frequency comb iyi-spectrum eyakhiwe uchungechunge lwezingxenye zefrikhwensi ezihlukaniswe ngokulinganayo ku-spectrum, ezingakhiqizwa ngamalaser akhiywe ngemodi, ama-resonator, nomaama-modulators e-electro-optical. Ama-Optical ama-combs akhiqizwa yi-ama-modulators e-electro-opticzinezici zokuphindaphinda okuphezulu, ukomisa kwangaphakathi namandla aphezulu, njll., ezisetshenziswa kakhulu ekulinganisweni kwezinsimbi, i-spectroscopy, noma i-fundamental physics, futhi zihehe isithakazelo sabacwaningi abaningi kakhulu eminyakeni yamuva.

Muva nje, u-Alexandre Parriaux nabanye abavela eNyuvesi yaseBurgendi eFrance bashicilele iphepha lokubuyekeza kujenali i-Advances in Optics and Photonics, bethula ngokuhlelekile inqubekelaphambili yocwaningo lwakamuva kanye nokusetshenziswa kwama-optical frequency Combs akhiqizwaukuguqulwa kwe-electro-optical: Kuhlanganisa ukwethulwa kwekama lefrikhwensi yokubona, indlela kanye nezici zekamu le-optical frequency elikhiqizwei-electro-optic module, futhi ekugcineni ibala izimo zohlelo lokusebenza lwei-electro-optic modulei-optical frequency comb ngokuningiliziwe, okuhlanganisa ukusetshenziswa kwe-spectrum enembile, ukuphazamiseka kwekama okuphindwe kabili, ukulinganiswa kwensimbi kanye nokukhiqizwa kwe-waveform okungahleliwe, futhi kudingidwa isimiso esingemuva kwezinhlelo zokusebenza ezahlukene. Ekugcineni, umbhali unikeza ithemba le-electro-optic modulator optical frequency comb technology.

01 Isendlalelo

Kwakuyiminyaka engu-60 edlule kule nyanga lapho uDkt. Maiman asungula i-laser yokuqala ye-ruby. Eminyakeni emine kamuva, uHargrove, Fock kanye noPollack beBell Laboratories e-United States baba ngabokuqala ukubika ukukhiya okusebenzayo okuzuzwe kumalaser e-helium-neon, i-mode-locking laser spectrum esizindeni sesikhathi simelelwa njengokuphuma kwe-pulse, esizindeni samafrikhwensi uchungechunge lwemigqa emifushane eqondile nelinganayo, efana kakhulu nokusebenzisa kwethu ama-combs nsuku zonke, ngakho-ke lesi sibukeli sibiza ngokuthi “ikamu le-optical frequency”. Kubhekiselwa ku-"optic frequency comb".

Ngenxa yethemba elihle lokusetshenziswa kwekama optical, uMklomelo KaNobel kuPhysics ngo-2005 waklonyeliswa uHansch noHall, abenza umsebenzi wokuphayona ngobuchwepheshe bekama elikhanyayo, kusukela ngaleso sikhathi, ukuthuthukiswa kwekama optical sekufinyelele esigabeni esisha. Ngenxa yokuthi izinhlelo zokusebenza ezihlukene zinezidingo ezihlukene zama-opticalcombs, njengamandla, isikhala somugqa kanye nobude beza obumaphakathi, lokhu kuholele esidingweni sokusebenzisa izindlela zokuhlola ezihlukene ukuze kukhiqizwe ama-opticalcombs, njengama-laser avaliwe, ama-micro-resonator kanye ne-electro-optical. imoduli.

I-FIG. 1 Ububanzi besizinda sesikhathi kanye nobubanzi besizinda sefrikhwensi yekama lefrikhwensi yokubona
Umthombo wesithombe: I-Electro-optic frequency Combs

Kusukela kwatholakala ama-optical frequency Combs, ama-optical frequencycombs amaningi akhiqizwa kusetshenziswa ama-laser akhiywe ngemodi. Kuma-lasers akhiywe ngemodi, imbobo enesikhathi sokubuya nokubuya engu-τ isetshenziselwa ukulungisa ubudlelwano besigaba phakathi kwamamodi e-longitudinal, ukuze kunqunywe izinga lokuphindaphinda kwe-laser, okungaba ngokujwayelekile ukusuka ku-megahertz (MHz) kuye ku-gigahertz ( GHz).

Ikama lokuvama kokubona elikhiqizwe i-micro-resonator lisekelwe emiphumeleni engaqondile, futhi isikhathi sokuya nokubuya sinqunywa ubude be-micro-cavity, ngoba ubude be-micro-cavity ngokuvamile bungaphansi kuka-1mm, imvamisa yokubona. ikamu elikhiqizwe i-micro-cavity ngokuvamile liyi-10 gigahertz kuya ku-1 terahertz. Kunezinhlobo ezintathu ezijwayelekile zama-microcavities, ama-microtubules, ama-microspheres nama-microrings. Ukusebenzisa imiphumela engaqondile kuma-optical fibers, njenge-Brillouin scattering noma ukuxuba kwamagagasi amane, kuhlanganiswe nama-microcavities, ama-combs optical frequency kumashumi ama-nanometers ububanzi angakhiqizwa. Ngaphezu kwalokho, ama-optical frequency Combs nawo angenziwa ngokusebenzisa amamodulators athile e-acousto-optic.