Itekhnoloji yeLaser yoBude obuNcinci Inxalenye yesiBini
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.
Umfanekiso 7 ubonisa ulwakhiwo lweelaser ezininzi eziqhelekileyo zemowudi enye ye-longitudinal.
Umfanekiso 7(a) ubonisa umgaqo wokusebenza wokukhetha imo ye-longitudinal enye ngokusekelwe kumgangatho we-FP ongaphakathi kwe-cavity, oko kukuthi, i-spectrum yokudlulisa i-linewidth encinci yomgangatho isetyenziselwa ukwandisa ukulahleka kwezinye iindlela ze-longitudinal, ukuze ezinye iindlela ze-longitudinal zihluzwe kwinkqubo yokhuphiswano lwemo ngenxa yokudluliselwa kwazo okuncinci, ukuze kufezekiswe ukusebenza kwemo ye-longitudinal enye. Ukongeza, uluhlu oluthile lwemveliso yokulungisa ubude be-wavelength lungafunyanwa ngokulawula i-Angle kunye nobushushu bomgangatho we-FP kunye nokutshintsha i-longitudinal mode interval. UMfanekiso 7(b) kunye no-(c) ubonisa i-oscillator yendandatho engeyiyo i-planar (NPRO) kunye nendlela ye-torsional pendulum mode cavity esetyenziselwa ukufumana i-single longitudinal mode output. Umgaqo wokusebenza kukwenza i-beam isasazeke kwicala elinye kwi-resonator, kususwe ngokufanelekileyo ukusasazwa kwendawo okungalinganiyo kwenani lamasuntswana aguqulweyo kwi-standing wave cavity eqhelekileyo, kwaye ngaloo ndlela kuthintelwe impembelelo yesiphumo sokutshisa umngxuma wendawo ukuze kufezekiswe i-single longitudinal mode output. Umgaqo wokukhetha imo yeBragg grating (VBG) ebanzi ufana noweeleser ze-semiconductor kunye ne-fiber narrow line-width ezikhankanyiweyo ngaphambili, oko kukuthi, ngokusebenzisa i-VBG njengento yokucoca, ngokusekelwe kukhetho lwayo oluhle lwe-spectral kunye nokukhetha kwe-Angle, i-oscillator iyajika kwi-wavelength ethile okanye ibhendi ukuze ifezekise indima yokukhetha imo ye-longitudinal, njengoko kubonisiwe kuMfanekiso 7(d).
Kwangaxeshanye, iindlela ezahlukeneyo zokukhetha imowudi ende zinokudityaniswa ngokweemfuno ukuphucula ukuchaneka kokukhetha imowudi ende, ukunciphisa ububanzi bomgca, okanye ukwandisa amandla okhuphiswano lwemowudi ngokungenisa utshintsho lwefrikhwensi engelulo olungqalileyo kunye nezinye iindlela, kunye nokwandisa ubude bomda wemveliso yelaser ngelixa isebenza kumgca ongqindilili, nto leyo enzima ukuyenza.i-laser ye-semiconductorkwayeiileyiza zefayibha.
(4) Ilaser yeBrillouin
I-laser yeBrillouin isekelwe kwisiphumo se-Brillouin scattering (SBS) esikhuthazwayo ukuze kufunyanwe ingxolo ephantsi, ubuchwepheshe bokukhupha i-linewidth encinci, umgaqo wayo kukusebenzisa i-photon kunye nokusebenzisana kwentsimi ye-acoustic yangaphakathi ukuvelisa utshintsho oluthile lwe-frequency ye-Stokes photons, kwaye iyaqhubeka nokwandiswa ngaphakathi kwe-gain bandwidth.
Umfanekiso 8 ubonisa umzobo wenqanaba lokuguqulwa kwe-SBS kunye nesakhiwo esisisiseko se-Brillouin laser.
Ngenxa yesantya esiphantsi sokungcangcazela kwentsimi ye-acoustic, utshintsho lwefrikhwensi yeBrillouin yezinto ludla ngokuba yi-0.1-2 cm-1 kuphela, ngoko ke nge-laser eyi-1064 nm njengesibane sepompo, ubude be-Stokes obuveliswayo budla ngokuba yi-1064.01 nm kuphela, kodwa oku kuthetha ukuba ukusebenza kwayo kwe-quantum conversion kuphezulu kakhulu (ukuya kuthi ga kwi-99.99% ngokwethiyori). Ukongeza, ngenxa yokuba i-Brillouin gain linewidth ye-medium idla ngokuba yeyomyalelo we-MHZ-ghz kuphela (i-Brillouin gain linewidth ye-solid media imalunga ne-10 MHz kuphela), incinci kakhulu kune-gain linewidth ye-laser working substance ye-100 GHz, ngoko ke, i-Stokes excited kwi-Brillouin laser inokubonisa i-spectrum narrowing phenomenon ecacileyo emva kokwandiswa okuninzi kwi-cavity, kwaye ububanzi be-output line width yayo buncinci kakhulu kunobubanzi be-pump line width. Okwangoku, i-laser yeBrillouin iye yaba yindawo ephambili yophando kwicandelo le-photonics, kwaye kubekho iingxelo ezininzi malunga nomyalelo we-Hz kunye ne-sub-Hz wemveliso yobubanzi bomgca obuncinci kakhulu.
Kwiminyaka yakutshanje, izixhobo zeBrillouin ezinesakhiwo se-waveguide ziye zavela kwicandelo le-ii-photonics ze-microwave, kwaye ziphuhla ngokukhawuleza kwicala le-miniaturization, ukuhlanganiswa okuphezulu kunye nesisombululo esiphezulu. Ukongeza, i-laser yeBrillouin esebenza esibhakabhakeni esekelwe kwizixhobo ezintsha zekristale ezifana nedayimani nayo ingene kwimbono yabantu kwiminyaka emibini edlulileyo, impumelelo yayo entsha kumandla esakhiwo se-waveguide kunye ne-cascade SBS bottleneck, amandla e-laser yeBrillouin ukuya kwi-10 W magnitude, ibeka isiseko sokwandisa ukusetyenziswa kwayo.
Indawo yokuhlangana ngokubanzi
Ngokuqhubeka nophando lolwazi oluphambili, iilaser ezimxinwa zibe sisixhobo esibalulekileyo kuphando lwesayensi ngenxa yokusebenza kwazo okugqwesileyo, njenge-laser interferometer LIGO yokufumanisa amaza axhuzulayo, esebenzisa i-single-frequency narrow linewidth.ilezaenobude bomda obuyi-1064 nm njengomthombo wembewu, kwaye ububanzi bomgca wokukhanya kwembewu bungaphakathi kwe-5 kHz. Ukongeza, ii-laser ezinobubanzi obuncinci ezinokuhlengahlengiswa kobude bomda kunye nokutsiba okungenamode nazo zibonisa amandla amakhulu okusetyenziswa, ngakumbi kunxibelelwano oluhambelanayo, olunokuhlangabezana ngokugqibeleleyo neemfuno ze-wavelength division multiplexing (WDM) okanye i-frequency division multiplexing (FDM) yokulungelelanisa ubude bomda (okanye i-frequency), kwaye kulindeleke ukuba ibe sisixhobo esiphambili sesizukulwana esilandelayo sobuchwepheshe bonxibelelwano oluphathwayo.
Kwixesha elizayo, ukuveliswa kwezinto ze-laser kunye netekhnoloji yokucubungula kuya kukhuthaza ngakumbi ukucinezelwa kobubanzi be-laser, ukuphuculwa kozinzo lwefrikhwensi, ukwandiswa kobubanzi be-wavelength kunye nokuphuculwa kwamandla, oku kuvula indlela yokuhlolwa kwabantu kwihlabathi elingaziwayo.
Ixesha lokuthumela: Novemba-29-2023