Yintoni ii-laser enobubanzi obumxinwa?
I-laser enobubanzi bomgca obumxinwa, Igama elithi "ububanzi bomgca" libhekisa kububanzi bomgca we-spectral we-ilezakwi-frequency domain, edla ngokulinganiswa ngokwe-half-peak full width of the spectrum (FWHM). Ububanzi bomgca buchaphazeleka kakhulu yimitha ezenzekelayo yee-athomu ezivuselelweyo okanye ii-ions, ingxolo yesigaba, ukungcangcazela koomatshini kwe-resonator, i-temperature jitter kunye nezinye izinto zangaphandle. Okukhona ixabiso lobubanzi bomgca lincinci, kokukhona ubunyulu be-spectrum buphezulu, oko kukuthi, kokukhona i-monochromaticity ye-laser ingcono. Ii-Laser ezineempawu ezinjalo zihlala zinengxolo encinci kakhulu yesigaba okanye ye-frequency kunye nengxolo encinci kakhulu yokuqina. Kwangaxeshanye, okukhona ixabiso lobubanzi bomgca lincinci le-laser, kokukhona i-coherence ehambelanayo iqina, ebonakaliswa njengobude bokuhambelana obude kakhulu.
Ukuphunyezwa kunye nokusetyenziswa kwelaser yobubanzi obumxinwa
Incitshiswe bububanzi bokufumana i-inherent yento esebenzayo ye-laser, phantse akunakwenzeka ukuqonda ngokuthe ngqo imveliso ye-narrow linewidth laser ngokuxhomekeka kwi-oscillator yendabuko ngokwayo. Ukuze kufezekiswe ukusebenza kwe-narrow linewidth laser, kudla ngokufuneka kusetyenziswe izihluzi, ii-grating kunye nezinye izixhobo ukunciphisa okanye ukukhetha i-longitudinal modulus kwi-gain spectrum, ukwandisa umahluko we-net gain phakathi kwe-longitudinal modes, ukuze kubekho i-longitudinal mode oscillation embalwa okanye enye kuphela kwi-laser resonator. Kule nkqubo, kudla ngokufuneka ukulawula impembelelo yengxolo kwi-laser output, kunye nokunciphisa ukwanda kwemigca ye-spectral ebangelwa kukungcangcazela kunye notshintsho lobushushu kwindawo yangaphandle; Kwangaxeshanye, inokudityaniswa nohlalutyo lwe-phase okanye i-frequency noise spectral density ukuqonda umthombo wengxolo kunye nokwenza ngcono uyilo lwe-laser, ukuze kufezekiswe i-stable output ye-narrow linewidth laser.
Makhe sijonge indlela esebenza ngayo i-linewidth encinci kwiindidi ezahlukeneyo zeelaser.
Iileyiza ze-semiconductor zineengenelo zobukhulu obuncinci, ukusebenza kakuhle okuphezulu, ubomi obude kunye neenzuzo zoqoqosho.
I-resonator ye-Fabry-Perot (FP) esetyenziswa kwi-optical resonator yendabukoiileyiza ze-semiconductorngokubanzi iyatshintshatshintsha kwimowudi ye-multi-longitudinal, kwaye ububanzi bomgca wemveliso bubanzi kakhulu, ngoko ke kuyimfuneko ukwandisa impendulo ye-optical ukuze kufumaneke umphumo wobubanzi bomgca omxinwa.
Impendulo esasazwayo (i-DFB Laser) kunye ne-Distributed Bragg reflection (i-DBR) ziilaser ezimbini eziqhelekileyo ze-internal optical feedback semiconductor lasers. Ngenxa ye-grating pitch encinci kunye nokukhetha okuhle kwe-wavelength, kulula ukufikelela kwi-stable single-frequency narrow linewidth output. Umahluko ophambili phakathi kwezi zakhiwo zimbini yindawo ye-grating: isakhiwo se-DFB Laser sihlala sisasaza isakhiwo se-periodic se-Bragg grating kuyo yonke i-resonator, kwaye i-resonator ye-DBR idla ngokwenziwa yisakhiwo se-reflection grating kunye ne-gain region edityaniswe kumphezulu wokugqibela. Ukongeza, ii-DFB lasers zisebenzisa ii-embedded gratings ezine-low refractive index contrast kunye ne-low reflectivity. Ii-DBR lasers zisebenzisa ii-surface gratings ezine-high refractive index contrast kunye ne-high reflectivity. Zombini izakhiwo zinoluhlu olukhulu lwe-free spectral kwaye zinokwenza i-wavelength tuning ngaphandle kwe-mode jump kuluhlu lwee-nanometers ezimbalwa, apho i-DBR laser inoluhlu olubanzi lwe-tuning kune-I-laser ye-DFBUkongeza, iteknoloji yempendulo ye-optical yangaphandle, esebenzisa izinto ze-optical zangaphandle ukuphendula ukukhanya okuphumayo kwe-semiconductor laser chip kunye nokukhetha i-frequency, inokwenza umsebenzi wobubanzi obuncinci be-linewidth ye-semiconductor laser.
(2) Iilaser zefayibha
Iilaser zefayibha zinamandla okuguqula iipompo, umgangatho olungileyo wemitha kunye nokusebenza kakuhle kokudibanisa, ezi zezona zihloko zishushu zophando kwicandelo lelaser. Kwimeko yexesha lolwazi, iilaser zefayibha zihambelana kakuhle neenkqubo zonxibelelwano lwefayibha ye-optical ezikhoyo kwimarike. Ilaser yefayibha ye-single-frequency enezibonelelo zobubanzi bomgca omxinwa, ingxolo ephantsi kunye nokuhambelana okuhle iye yaba yenye yeendlela ezibalulekileyo zophuhliso lwayo.
Ukusebenza kwendlela enye ye-longitudinal yeyona nto iphambili kwi-fiber laser ukuze kufezekiswe imveliso yobubanzi obumxinwa, ngokwesakhiwo se-resonator, i-single frequency fiber laser inokwahlulwa ibe yi-DFB type, i-DBR type kunye ne-ring type. Phakathi kwazo, umgaqo wokusebenza kwe-DFB Laser kunye ne-DBR single-frequency fiber lasers ufana nowe-DFB kunye ne-DBR semiconductor lasers.
Ngo-1960, i-laser yokuqala yeruby ehlabathini yayiyi-laser ye-solid-state, ebonakaliswa ngamandla aphezulu okukhupha kunye nokugubungela ubude obubanzi bobude. Ulwakhiwo olukhethekileyo lwendawo ye-laser ye-solid-state lwenza ukuba iguquguquke ngakumbi kuyilo lwe-output ye-linewidth enqamlezileyo. Okwangoku, iindlela eziphambili ezisetyenzisiweyo ziquka indlela emfutshane ye-cavity, indlela ye-one-way ring cavity, indlela ye-intracavity standard, indlela ye-torsion pendulum mode cavity, indlela ye-volume Bragg grating kunye nendlela ye-seed injection.
Ixesha lokuthumela: Juni-03-2025