Gukoresha urumuri rwumucyo uhindura urumuri rwa vortex

Amavu n'amavuko

Ibintu bya Vortex bigaragara mubuzima, nka vortices yo koga ibaho mugihe cyo kuvoma amazi, kubyuka vortice itandukana nubwato mugihe bagenda, tornado, tifuni, hamwe no kuzenguruka inyanja. Umucyo wa Vortex (utwara orbital angular momentum, OAM) wavumbuwe bwa mbere kandi ushyirwa mubikorwa cyane cyane mubijyanye na optique, ni ukuvuga kubyara fotone ya vortex na beam vortex, kandi igitekerezo cyibiti bya vortex cyatanzwe bwa mbere na Coullet nabandi. muri 1989. Mu 1922, L. Allen n'abandi. byerekanwe ko OAM ibaho mumirongo ya vortex, yasunikaga umurima kumwanya wambere kwisi.

Ugereranije n’umucyo gakondo umwe-impeta yumucyo, urumuri rwa vortex (COV) ni urumuri rugizwe numucyo uhujwe n’amatara menshi ya vortex, bityo ukaba ufite ibintu byinshi bigoye kandi bitandukanye, ibyo bikaba bituma habaho uburyo butandukanye bwo gukoresha mubikorwa bitandukanye.

Kurugero, mugukoresha uduce duto, urumuri rwa vortex rushobora kubyara urumuri rufite urumuri rutandukanye rwa orbital, rutanga uburyo bworoshye bwo gukoresha ibice; mu itumanaho ryiza, urumuri rwa vortex rushobora kohereza amakuru menshi munzira imwe ya optique, ifite akamaro kanini mugukomeza kwagura ubushobozi bwitumanaho rya optique.

Nka bumwe mu buryo nyamukuru bwo guhindura umurima wa optique, modulatrice yumucyo ikoreshwa cyane mubice bitandukanye bitewe nuburyo bworoshye bwo gukora nubushobozi bwo gutanga ingaruka nziza zo gufata amashusho, kandi ikoreshwa ryumucyo utanga urumuri kugirango habeho urumuri rwa vortex rufite ibyifuzo byinshi muburyo bwo gutumanaho no gukoresha ibice.

Ibisobanuro

Umuyoboro wa optique ni urumuri rufite icyerekezo cya fonctionnement hamwe na orbital angular momentum (OAM) ishobora gutwara imibare itandukanye ya topologiya. Iterambere ryagezweho mubushakashatsi bwibiti bya vortex ryahinduye imikoreshereze yimikorere nka optique ya optique ikoreshwa neza, itumanaho rifite imbaraga nyinshi, hamwe n’amashusho arenze urugero. Ntagushidikanya ko vortex beam generation nuburyo bwo gutahura nibyingenzi mubikorwa bya vortex.

Ihame ry'ibisekuruza

Uburyo bwibisekuru bushingiye kumucyo utandukanijwe cyane cyane harimo uburyo bwa plaque ya plaque, uburyo bwo guhinduranya urumuri rwumwanya, uburyo bwo gufata ibyuma bya holographe, hamwe nuburyo bwa lens lens. Muri byo, moderi yumucyo uhinduranya ni igikoresho cya optoelectronic gishobora guhinduranya muburyo bumwe cyangwa amakuru yose yumubiri nka amplitude, icyiciro, hamwe na polarisiyasi yumucyo wumucyo.

Ukoresheje ingufu za electro-optique ya kristu yamazi, moderi yumucyo uhindagurika irashobora kugaragara kugirango ihindure amplitude hamwe nicyiciro cyumucyo wabaye, kugirango urumuri rumurika rumenye impinduka. Moderi yumucyo uhindagurika irashobora gukoreshwa kugirango yikoreze hologramamu kugirango ikore urumuri rwumuyaga, cyangwa muburyo bwo kwinjiza amakuru yicyiciro kuva icyapa.

Imirasire ya Vortex ihuye nimibare itandukanye ya topologiya (ishusho kuva mubipimo byo munzu)

Kugerageza

Muri ubu bushakashatsi, laser yahisemo gukoreshwa ni He-Ne laser ifite uburebure bwa 632.8 nm. inzira ya optique yinzira irerekanwa mumashusho hepfo. Lazeri yabanje kunyura muri sisitemu yo gukwirakwiza ibiti kugirango ikore imiterere nini hafi yumucyo-hejuru-urumuri rwumucyo, hanyuma inyura muri polarizeri mbere yo kugera kumashanyarazi yumucyo, aho ingabo yumucyo ishyirwa ako kanya imbere yumucyo utanga urumuri.

Itara rya laser rigera kumurongo uhindura urumuri nyuma yo guhinduranya ubukana bwurumuri na mask. Nyuma yo guhinduranya icyiciro, laser igaragarira mubindi polarizer, kandi ibisubizo byubushakashatsi birashobora kugaragara nyuma yiyi polarizer. Hano, kubera ko amashusho yerekana amashusho yumucyo utandukanya ni 15.36mm × 8.64mm, akaba ari manini cyane kuruta agace yakira amashusho ya CCD, ishusho yakirwa na CCD binyuze muri sisitemu ya 4f.

Igikoresho cyo kugerageza

Moderi yumucyo ikoreshwa muri ubu bushakashatsi ni FSLM-2K70-P02, kandi ibipimo nyamukuru ni ibi bikurikira:

Ibisubizo

(a) - (d) herekana gukwirakwiza ubukana bwurumuri rwakozwe mugihe amafaranga ya topologiya ari 2,5, -5,10.

Imibare (a) (b) yerekana ibyapa bibiri bya buri mwaka (ASPP) igicucu gifite ubugari bumwe ariko radiyo itandukanye hamwe na centre opaque. R1, r2 muri byombi ni 1,2mm, 2,4mm; 2.4mm, 3,6mm.

Imibare (c) (d) yerekana amashusho yabonetse mugushiraho ibiciro bya topologiya yumucyo utanga urumuri kuri 2 hanyuma ugashyira masike yumucyo imbere yumucyo utanga urumuri. Imibare (e) (f) yerekana amashusho yagaragaye nyuma yo gushyira umubare wumubare wa topologiya kuri 10.

Igishushanyo (a) cyerekana igicucu cyibikoresho bitanga urumuri rwa vortex.

Igishushanyo (b) cyerekana ubukana bwurumuri rwatanzwe mugihe imbere ninyuma ya topologiya yishyurwa ari 1 na 3.

Igishushanyo.

Igishushanyo (d) cyerekana ubukana bwurumuri nyuma yo kwishyuza topologiya ihora ihoraho kandi imirongo isimbuzwa iyindi.

Imibare (e) na (f) yerekana ubukana bwurumuri rwagabanijwe mugihe amafaranga yimbere yimbere ninyuma ari 5.1; 20.1.

Umwanzuro

Guhindura ubukana bwumucyo nicyiciro bigerwaho muguhuza mask yumucyo hamwe nicyiciro cyubwoko bwa moderi yumucyo uhinduranya, kandi ubushobozi bwibikoresho bitanga urumuri rwa vortex bitanga ingufu za COVs nibiranga byagenzuwe mubigeragezo, kimwe nibiranga icyapa cya spiral (SPP), hamwe nicyapa cya spiral icyiciro (ASPP) mukubyara urumuri rwa vortex.

Igikoresho cya vortex yibikoresho bitanga urumuri rwakozwe muriyi mpapuro birashobora gukora umubare uwo ari wo wose wimpeta yibanze ukurikije imikoreshereze. Urumuri rwinshi rwa vortex ruzaba rufite intera nini ya porogaramu mubice byitumanaho rya optique hamwe na manipulation.