Inkcazo esetyenziswa ngokuqhelekileyo yomgangatho we-beam ibandakanya i-radius yendawo ekude, ukuhlukana kwentsimi angle, umda we-diffraction multiple U, Strehl ratio, factor M2 , amandla kwi indawo ekujoliswe kuyo okanye umlinganiselo wamandla we-loop, njl.

Umgangatho we-beam yiparameter ebalulekileyo ye-laser. Iimpawu ezimbini eziqhelekileyo zomgangatho we-beam ziI-BPP kwaye M2 leyo zithathwe ngokusekelwe kwingqikelelo efanayo yomzimba kwaye zinokuguqulwa omnye komnye. Umgangatho we-Laser beam ubalulekile kuba ubungakanani bomzimba obuphambili ukugweba ukuba i-laser ilungile okanye ayilunganga kwaye nokuba i ukusetyenzwa ngokuchanekileyo kunokwenziwa. Kwiindidi ezininzi ze-laser eziphuma kwimowudi enye, iilaser ezikumgangatho ophezulu zihlala zinomgangatho ophezulu we-beam, ohambelana nencinci kakhulu.M2, njenge 1.05 okanye 1.1. Ngapha koko, i-laser inokugcina umgangatho olungileyo we-beam kubo bonke ubomi bayo benkonzo, kunyeM2 ixabiso liphantse lingatshintshanga. Ngomatshini wokuchaneka kwelaser, umgangatho ophezuluumqadi kulungele ngakumbi ukubunjwa, ukuze kuqhutywe umatshini we-laser osicaba ngaphandle kokonakalisa i-substrate kwaye ngaphandle kwefuthe lobushushu. Ngokusebenza,M2 isetyenziswa kakhulu kwi-laser eqinile kunye negesi, ngelixa I-BPP isetyenziswa kakhulu kwi-fiber lasers xa uleyibhelishwa kwiinkcukacha zeelaser.

Umgangatho we-Laser beam udla ngokubonakaliswa ngeeparamitha ezimbini: I-BPP kwaye M². M²idla ngokubhalwa njenge M2. Lo mzobo ulandelayo ubonisa usasazo lwelongitudinal yomqadi weGaussian, aphoW ngumqadi esinqeni radius kunye θ sisiqingatha sokwahlukana kwentsimi ekude angle.

Ukuguqulwa kweBPP kunye M2

I-BPP (Imveliso yeParameter yeBeam) ichazwa njengeradiyasi esinqeni W iphindaphindwe nge Umahluko wesiqingatha esikude angle θ:

         BPP = W × θ

I Umahluko wesiqingatha esikude angle θ yeGaussian beam yile:

        θ₀ = λ / πW₀

M² ngumlinganiselo wemveliso yepharamitha yepharamitha kwimveliso yeparamitha yendlela esisiseko yeGaussian beam:

        M² =（W×θ）/（W₀×θ₀）= BPP /（λ / π）

Akukho nzima ukufumana kule fomula ingentla ukuba I-BPP izimele kubude bobude, ngelixa M² ayinxulumananga ne-laser wavelength. Ikakhulu inxulumene noyilo lomgodi kunye nokuchaneka kwendibano yelaser.

Ixabiso le M² isondele ngokungenasiphelo kwi-1, ebonisa umlinganiselo phakathi kwedatha yokwenyani kunye nedatha efanelekileyo. Xa idatha yangempela isondele kwidatha efanelekileyo, umgangatho we-beam ungcono, oko kukuthi, niniM² isondele ku-1, i-angle yokuhlukana ehambelanayo incinci, kwaye umgangatho we-beam ungcono.

Umlinganiselo yeBPP kunye M2
I-analyzer yomgangatho we-beam ingasetyenziselwa ukulinganisa umgangatho we-beam. Umgangatho we-beam nawo unokulinganiswa ngokusebenzisa i-analyzer yokukhanya kunye nokusebenza okuntsokothileyo. Idatha iqokelelwa kwiindawo ezahlukeneyo zecandelo lomnqamlezo we-laser kwaye emva koko idityaniswe yinkqubo yokwakha-ngaphakathi ukuvelisa.M2. M2 ayinakulinganiswa ukuba kukho ukungasetyenziswa kakuhle okanye impazamo yomlinganiselo kwinkqubo yokuthatha isampulu. Kwimilinganiselo yamandla aphezulu, inkqubo yokunciphisa i-sophisticated attenuation iyadingeka ukuze kugcinwe amandla e-laser ngaphakathi koluhlu olunokulinganiswa kwaye ugweme nawuphi na umonakalo wendawo yokukhangela isixhobo.

I-fiber optical core kunye ne-aperture yamanani inokuqikelelwa ngokomzobo ongentla. Kuba lasers ifayibha, radius esinqeni ω₀= i-fiber core diameter /2 = R, θ = isonoα =α= N / A (umngxuma wokuvula amanani).

Isishwankathelo se-BPP, M2, kwaye Bem Qimeko

I-BPP encinci, ingcono umgangatho we-laser beam.

Nge-1.08µi-fiber lasers m, M2 = 1, I-BPP = λ / p = 0.344 mm Mrintengiso

Nge-10.6µm CO₂ lasers, imowudi enye esisiseko M2 = 1, I-BPP = 3.38 mm Mrintengiso

Kucingelwa ukuba ii-engile zokwahlukana ezimbini ezingatshatanga esisiseko indlela iilaser (okanye iindlela ezininzi lasers ezifanayo M2) ziyafana emva kokugxila, i-diameter ye-focal ye-CO₂ i-laser ngamaxesha angama-10 kune-fiber laser.

Ikufutshane M2 kukuya ku-1, ngcono umgangatho we-laser beam.

Xa i-laser beam ingaphakathi GUkuhanjiswa kwe-aussian okanye kufutshane nokuhanjiswa kwe-Gaussian, ikufutshane ne M2 ukuya ku-1, okukhona i-laser yokwenyani isondele kweyona laser yeGaussian efanelekileyo, kokukhona umgangatho we-beam ungcono.