Kodi chisakanizo cha ma frequency optical modulator ndi chiyani? Gawo Loyamba

Chipeso cha ma frequency optical ndi sipekitiramu yopangidwa ndi zigawo zingapo zama frequency zomwe zimagawidwa mofanana pa sipekitiramu, zomwe zimatha kupangidwa ndi ma lasers otsekedwa ndi mode, ma resonators, kapenama modulators amagetsi ndi kuwala. Zisa za ma frequency optical zopangidwa ndima modulators a electro-opticali ndi makhalidwe monga kubwerezabwereza pafupipafupi, kuyanika mkati ndi mphamvu zambiri, ndi zina zotero, zomwe zimagwiritsidwa ntchito kwambiri poyesa zida, spectroscopy, kapena fizikisi yoyambira, ndipo zakopa chidwi cha ofufuza ambiri m'zaka zaposachedwa.

Posachedwapa, Alexandre Parriaux ndi ena ochokera ku yunivesite ya Burgendi ku France adasindikiza pepala lowunikira mu magazini ya Advances in Optics and Photonics, pofotokoza mwadongosolo kupita patsogolo kwa kafukufuku waposachedwa komanso kugwiritsa ntchito ma frequency combs opangidwa ndikusintha kwa magetsi ndi kuwala: Zimaphatikizapo kuyambitsa chisa cha ma frequency optical, njira ndi makhalidwe a chisa cha ma frequency optical chomwe chimapangidwa ndimodulator yamagetsi, ndipo potsiriza imafotokoza zochitika za kugwiritsa ntchitomodulator yamagetsimwatsatanetsatane za chisa cha ma frequency optical, kuphatikizapo kugwiritsa ntchito ma spectrum olondola, kusokoneza chisa cha ma double optical, kulinganiza zida ndi kupanga ma waveform mosasamala kanthu, komanso kukambirana mfundo zomwe zili kumbuyo kwa ntchito zosiyanasiyana. Pomaliza, wolembayo akupereka chiyembekezo cha ukadaulo wa electro-optic modulator optical frequency comb.

01 Mbiri

Mwezi uno, zaka 60 zapitazo, Dr. Maiman adapanga laser yoyamba ya ruby. Patatha zaka zinayi, Hargrove, Fock ndi Pollack a Bell Laboratories ku United States anali oyamba kunena za active mode-locking yomwe idachitika mu helium-neon lasers, mode-locking laser spectrum mu nthawi imayimiridwa ngati pulse emission, mu frequency domain muli mndandanda wa mizere yayifupi komanso yofanana, yofanana kwambiri ndi momwe timagwiritsira ntchito zisa tsiku ndi tsiku, kotero timatcha spectrum iyi kuti "optical frequency comb". Amatchedwa "optical frequency comb".

Chifukwa cha kuthekera kwabwino kogwiritsa ntchito chisa cha kuwala, Mphoto ya Nobel mu Fizikiki mu 2005 idaperekedwa kwa Hansch ndi Hall, omwe adapanga ntchito yoyambirira paukadaulo wa chisa cha kuwala, kuyambira pamenepo, chitukuko cha chisa cha kuwala chafika pagawo latsopano. Chifukwa ntchito zosiyanasiyana zimakhala ndi zofunikira zosiyanasiyana pa chisa cha kuwala, monga mphamvu, malo olumikizirana ndi kutalika kwa mtunda, izi zapangitsa kuti pakhale kufunika kogwiritsa ntchito njira zosiyanasiyana zoyesera kuti apange chisa cha kuwala, monga ma laser otsekedwa ndi mode, ma micro-resonators ndi electro-optical modulator.

CHITHUNZI 1 Nthawi yowonera ma frequency ndi nthawi yowonera ma frequency
Chithunzi chochokera: Zikhomo zama electro-optic frequency

Kuyambira pomwe zidapezeka zoyezera ma frequency, zoyezera ma frequency ambiri zimapangidwa pogwiritsa ntchito ma laser otsekeredwa mode. Mu ma laser otsekeredwa mode, malo okhala ndi nthawi yozungulira ya τ amagwiritsidwa ntchito kukonza ubale wa gawo pakati pa ma longitudinal mode, kuti adziwe kuchuluka kwa kubwerezabwereza kwa laser, komwe nthawi zambiri kumatha kukhala kuyambira megahertz (MHz) mpaka gigahertz (GHz).

Chisa cha ma frequency optical chomwe chimapangidwa ndi micro-resonator chimadalira zotsatira zosalunjika, ndipo nthawi yobwerera imatsimikiziridwa ndi kutalika kwa chisa chaching'ono, chifukwa kutalika kwa chisa chaching'ono nthawi zambiri kumakhala kochepera 1mm, chisa cha ma frequency optical chomwe chimapangidwa ndi chisa chaching'ono nthawi zambiri chimakhala 10 gigahertz mpaka 1 terahertz. Pali mitundu itatu yodziwika bwino ya ma microcavities, ma microtubules, ma microspheres ndi ma microrings. Pogwiritsa ntchito zotsatira zosalunjika mu ulusi wa optical, monga Brillouin scattering kapena four-wave mixing, kuphatikiza ndi ma microcavities, ma optical frequency combs omwe ali mu ma nanometers a makumi angapo amatha kupangidwa. Kuphatikiza apo, ma optical frequency combs amathanso kupangidwa pogwiritsa ntchito ma acousto-optic modulators ena.