Uburyo bwo guhindura imiterere y'ingirabuzimafatizo (flexible bipolar phase modulator)

Bipolar ihindagurikamodulator y'icyiciro

Mu rwego rw'itumanaho ryihuse ry'amajwi n'ikoranabuhanga rya quantum, modulator zisanzwe zihura n'imbogamizi zikomeye mu mikorere! Ubuziranenge buke bw'amajwi, kugenzura imiterere y'imashini, n'ikoreshwa ry'ingufu nyinshi cyane - izi mbogamizi zibangamira iterambere ry'ikoranabuhanga.

Bipolarmodulator y'icyiciro cya electro-opticalishobora kugera ku byiciro bibiri byo guhindura imikorere y’ibimenyetso by’urumuri. Bifite uburyo bwo gushyira hamwe cyane, gutakaza ingufu nke, bandwidth yo guhinduranya imikorere myinshi, voltage ntoya ya kimwe cya kabiri cy’umuraba, n’imbaraga nyinshi zo kwangirika. Bikoreshwa cyane cyane mu kugenzura urusaku rw’urumuri rw’urumuri muri sisitemu y’itumanaho ryihuse cyane no gukora ibintu mu buryo buhuriweho muri sisitemu yo gukwirakwiza urufunguzo rwa quantum. Gukora imigozi yo ku ruhande muri sisitemu ya ROF no kugabanya Brillouin scattering (SBS) muri sisitemu y’itumanaho rya analog optical fiber, n’ibindi bice.

Itsindamodulator y'igihe cy'ihindagurika ry'impindukaigenzura neza icyiciro cy'ibimenyetso by'urumuri binyuze mu buryo bw'impinduka z'icyiciro gikomeza cy'ibyiciro bibiri, cyane cyane ikagaragaza agaciro kadasanzwe mu itumanaho ryihuse ry'urumuri n'ikwirakwizwa ry'urufunguzo rwa quantum.

1. Ihuzwa cyane kandi ifite ubushobozi bwo kwangirika cyane: Ikoresha igishushanyo mbonera cya monolithic, ni ntoya mu bunini, kandi ishyigikira imbaraga za optique zangiritse cyane. Ishobora guhuzwa neza n'amasoko ya laser ya ingufu nyinshi kandi ikwiriye gukora neza imigozi yo ku ruhande ya milimetero muri sisitemu za ROF (Optical Wireless).

2. Guhagarika Chirp no gucunga SBS: Mu kohereza ubutumwa bwihuse cyane, umurongo ugororotse waihindagurika ry'ibyiciroishobora gukumira neza ijwi ry'ibimenyetso by'urumuri. Mu itumanaho rya fibre optique ya analog, binyuze mu kunoza uburebure bwa phase modulation, ingaruka za stimulated Brillouin scattering (SBS) zishobora kugabanuka cyane, bityo intera yo kohereza ikagabanuka.

Mu ikwirakwizwa ry'urufunguzo rwa quantum (QKD), imiterere y'urufunguzo rwa fotoni ikora nk'"urufunguzo rwa quantum" rwo gutumanaho mu buryo bwizewe - uburyo rutegurwa neza bugena neza imiterere y'urufunguzo idatuma umuntu arumva. "Guhindagurika" kwa modulator y'igice cya bipolar bigaragarira mu bushobozi bwayo bwo guhindura ibipimo by'igice kugira ngo ihuze n'ibibazo by'ibidukikije by'imiyoboro itandukanye ya fibre optique (nk'impinduka z'ubushyuhe n'ihindagurika ry'ibyiciro biterwa n'imbaraga za mechanical), bigatuma habaho imikorere myiza ya fotoni ivanze. "Guhagarara" bigerwaho binyuze mu kugenzura ubushyuhe neza n'ikoranabuhanga rya frequency rifunga, rigabanya urusaku rw'ibyiciro ruri munsi y'umupaka w'urusaku rwa quantum kandi rikarinda kudahuza kw'imiterere ya quantum mu gihe cyo kohereza. Iyi miterere ibiri ya "guhindagurika + guhagarara" ntiyongera gusa umuvuduko w'ikwirakwizwa ry'intera ngufi mu miyoboro y'umujyi (nk'umuvuduko w'amakosa make uri munsi ya 1% mu birometero 50), ahubwo inashyigikira ubuziranenge bw'urufunguzo mu kohereza kure mu miyoboro y'imijyi (nk'ibirometero birenga ijana mu mijyi), bikaba igice cy'ingenzi cyo kubaka umuyoboro w'itumanaho wa quantum "utekanye rwose".