Cov khoom siv hloov pauv bipolar yooj ywm

Bipolar uas yoog tautheem modulator

Hauv kev sib txuas lus ceev ceev thiab thev naus laus zis quantum, cov modulators ib txwm muaj kev cuam tshuam loj heev! Kev tsis muaj qhov huv ntawm lub teeb liab, kev tswj hwm theem tsis yooj ywm, thiab kev siv hluav taws xob ntau dhau - cov teeb meem no tab tom cuam tshuam kev txhim kho thev naus laus zis.

Bipolarelectro-optical theem modulatortuaj yeem ua tiav ob theem kev hloov kho tas mus li ntawm theem ntawm cov teeb liab kho qhov muag. Lawv muaj kev sib koom ua ke siab, qis qhov poob ntawm kev ntxig, bandwidth siab hloov kho, qis ib nrab nthwv dej voltage, thiab siab puas tsuaj optical zog. Lawv feem ntau yog siv rau kev tswj hwm optical chirp hauv cov kab ke sib txuas lus optical ceev thiab entangled lub xeev tiam hauv quantum key distribution systems. Lub cim ntawm sidebands hauv ROF systems thiab kev txo qis ntawm stimulated Brillouin scattering (SBS) hauv analog optical fiber sib txuas lus systems, ntawm lwm qhov chaw.

Lubbipolar theem modulatorua tiav kev tswj hwm qhov tseeb ntawm theem ntawm cov teeb liab optical los ntawm ob-theem kev hloov kho theem tas mus li, thiab qhia tshwj xeeb tshaj yog qhov tseem ceeb hauv kev sib txuas lus optical ceev thiab kev faib tawm quantum key.

1. Kev sib koom ua ke siab thiab qhov ua rau puas tsuaj siab: Nws siv kev tsim qauv monolithic, me me, thiab txhawb nqa lub zog kho qhov muag puas tsuaj siab. Nws tuaj yeem sib xws nrog cov chaw laser muaj zog siab thiab tsim nyog rau kev tsim cov millimeter-wave sidebands hauv ROF (Optical Wireless) systems.

2. Kev tswj hwm chirp thiab SBS: Hauv kev sib kis ceev ceev, qhov linearity ntawmkev hloov kho theemtuaj yeem ua kom tsis txhob muaj lub suab ntawm cov teeb liab kho qhov muag. Hauv kev sib txuas lus analog fiber ntau, los ntawm kev ua kom zoo dua qhov tob ntawm kev hloov kho theem, qhov cuam tshuam Brillouin scattering (SBS) uas raug txhawb nqa tuaj yeem txo qis, yog li ntawd nthuav qhov deb ntawm kev sib kis.

Hauv kev faib tawm quantum key (QKD), lub xeev entangled ntawm photon khub ua haujlwm ua "quantum key" rau kev sib txuas lus ruaj ntseg - qhov tseeb ntawm nws txoj kev npaj txiav txim siab ncaj qha rau qhov tsis-eavesdropping khoom ntawm tus yuam sij. Lub "ywj pheej" ntawm bipolar theem modulator yog pom tseeb hauv nws lub peev xwm los hloov kho cov txheej txheem theem kom hloov kho rau kev cuam tshuam ib puag ncig ntawm cov fiber ntau optical txuas (xws li kev hloov pauv kub thiab theem drift los ntawm kev ntxhov siab mechanical), kom ntseeg tau tias muaj kev ua haujlwm siab ntawm cov photon khub entangled. Lub "ruaj khov" yog ua tiav los ntawm kev tswj hwm qhov kub thiab txias meej thiab theem-locking zaus technology, uas supsuppress theem suab nrov hauv qab qhov txwv quantum suab nrov thiab tiv thaiv kev decoherence ntawm quantum xeev thaum lub sijhawm kis. Qhov ob yam ntxwv ntawm "ywj pheej + ruaj khov" tsis yog tsuas yog txhim kho tus nqi ntawm kev faib tawm luv luv hauv cov tes hauj lwm hauv cheeb tsam nroog (xws li tus nqi yuam kev me ntsis tsawg dua 1% hauv 50 kilometers), tab sis kuj txhawb nqa kev ncaj ncees ntawm cov yuam sij hauv kev sib kis ntev hauv cov tes hauj lwm intercity (xws li ntau dua ib puas kilometers thoob plaws nroog), ua lub hauv paus tseem ceeb rau kev tsim kom muaj "kev nyab xeeb kiag li" quantum kev sib txuas lus network.