Ingxenye Yesibili Yobuchwepheshe Be-Laser Enobubanzi Obuncane
Ngo-1960, i-laser yokuqala ye-ruby emhlabeni kwakuyi-laser yesimo esiqinile, ebonakala ngamandla aphezulu okukhipha kanye nokumbozwa okubanzi kwe-wavelength. Isakhiwo esiyingqayizivele sendawo ye-laser yesimo esiqinile senza kube lula kakhulu ekwakhiweni kokukhipha kobubanzi bomugqa omncane. Njengamanje, izindlela eziyinhloko ezisetshenzisiwe zifaka phakathi indlela yesikhala esifushane, indlela yesikhala sendandatho eyodwa, indlela ejwayelekile ye-intracavity, indlela yesikhala semodi ye-torsion pendulum, indlela ye-volume Bragg grating kanye nendlela yokujova imbewu.
Isibalo 7 sibonisa isakhiwo sama-laser amaningana ajwayelekile e-single-longitudinal mode solid-state.
Isithombe 7(a) sibonisa isimiso sokusebenza sokukhetha imodi eyodwa ye-longitudinal ngokusekelwe ku-FP standard in-cavity, okungukuthi, i-narrow linewidth transmission spectrum yesimiso isetshenziselwa ukwandisa ukulahlekelwa kwezinye izindlela ze-longitudinal, ukuze ezinye izindlela ze-longitudinal zihlungwe enkambisweni yokuncintisana yemodi ngenxa yokudlulisa kwazo okuncane, ukuze kufezwe ukusebenza kwemodi eyodwa ye-longitudinal. Ngaphezu kwalokho, ububanzi obuthile bokukhipha ubude be-wavelength bungatholakala ngokulawula i-Angle kanye nokushisa kwe-FP standard kanye nokushintsha isikhawu semodi ye-longitudinal. Isithombe 7(b) kanye no-(c) sibonisa i-oscillator yendandatho engeyona i-planar (NPRO) kanye nendlela ye-torsional pendulum mode cavity esetshenziswa ukuthola umphumela wemodi eyodwa ye-longitudinal. Isimiso sokusebenza ukwenza i-beam isakazeke ngendlela eyodwa ku-resonator, kuqedwe ngempumelelo ukusatshalaliswa kwendawo okungalingani kwenani lezinhlayiya ezibuyiselwe emuva emgodini wamagagasi ajwayelekile, ngaleyo ndlela kugwenywe ithonya lomphumela wokushisa kwembobo yendawo ukuze kufezwe umphumela wemodi eyodwa ye-longitudinal. Isimiso sokukhetha imodi ye-bulk Bragg grating (VBG) sifana nesama-laser e-semiconductor kanye ne-fiber narrow line-width okukhulunywe ngawo ngaphambili, okungukuthi, ngokusebenzisa i-VBG njengento yokuhlunga, ngokusekelwe ekukhetheni kwayo okuhle kwe-spectral kanye nokukhetha kwe-Angle, i-oscillator iyashintshashintsha ku-wavelength ethile noma ibhendi ukuze ifeze indima yokukhetha imodi ye-longitudinal, njengoba kuboniswe kuMfanekiso 7(d).
Ngesikhathi esifanayo, izindlela eziningana zokukhetha imodi ye-longitudinal zingahlanganiswa ngokwezidingo zokuthuthukisa ukunemba kokukhetha imodi ye-longitudinal, ukunciphisa ububanzi bomugqa, noma ukwandisa ukuqina komncintiswano wemodi ngokungenisa ukuguqulwa kwemvamisa engeyona i-linear nezinye izindlela, nokwandisa ubude bomphetho we-laser ngenkathi isebenza kububanzi bomugqa obuncane, okunzima ukukwenza.i-laser ye-semiconductorfuthiama-laser efayibha.
(4) I-laser ye-Brillouin
I-laser ye-Brillouin isekelwe kumphumela we-Brillouin scattering (SBS) oshukumisayo ukuze kutholakale ubuchwepheshe bokukhipha umsindo ophansi, obuncane bomugqa, isimiso sayo siwukusebenzisa i-photon kanye nokusebenzisana kwensimu ye-acoustic yangaphakathi ukukhiqiza ukushintsha kwemvamisa ethile yama-photon e-Stokes, futhi ikhuliswa njalo ngaphakathi kwe-gain bandwidth.
Isibalo 8 sibonisa umdwebo wezinga lokuguqulwa kwe-SBS kanye nesakhiwo esiyisisekelo se-laser ye-Brillouin.
Ngenxa yemvamisa ephansi yokudlidliza kwensimu ye-acoustic, ukushintsha kwemvamisa ye-Brillouin yezinto ngokuvamile kuba ngu-0.1-2 cm-1 kuphela, ngakho-ke nge-laser engu-1064 nm njengokukhanya kwephampu, ubude be-Stokes obukhiqizwayo buvame ukuba ngu-1064.01 nm kuphela, kodwa lokhu kusho nokuthi ukusebenza kahle kwayo kokuguqulwa kwe-quantum kuphakeme kakhulu (kufika ku-99.99% ngokombono). Ngaphezu kwalokho, ngoba ububanzi be-Brillouin gain linewidth ye-medium buvame ukuba yi-oda le-MHZ-ghz kuphela (ububanzi be-Brillouin gain linewidth yeminye imithombo eqinile bungaba ngu-10 MHz kuphela), buncane kakhulu kunobubanzi be-gain linewidth yento esebenzayo ye-laser ye-oda le-100 GHz, ngakho-ke, i-Stokes excited ku-Brillouin laser ingabonisa isenzakalo esicacile sokuncishiswa kwe-spectrum ngemva kokukhulisa okuningi emgodini, futhi ububanzi bomugqa wayo wokukhipha bungama-oda amaningana obukhulu kunobubanzi bomugqa wephampu. Njengamanje, i-laser ye-Brillouin isibe yindawo yokucwaninga emkhakheni we-photonics, futhi kube nemibiko eminingi mayelana nohlelo lwe-Hz kanye ne-sub-Hz lokukhipha ububanzi bomugqa obuncane kakhulu.
Eminyakeni yamuva nje, amadivayisi e-Brillouin anesakhiwo se-waveguide avele emkhakheni we-ama-photonic e-microwave, futhi zithuthuka ngokushesha ngokuya nge-miniaturization, ukuhlanganiswa okuphezulu kanye nesisombululo esiphezulu. Ngaphezu kwalokho, i-laser ye-Brillouin esebenza esikhaleni esekelwe ezintweni ezintsha zekristalu njengedayimane nayo ingene embonweni wabantu eminyakeni emibili edlule, intuthuko yayo entsha emandleni esakhiwo se-waveguide kanye ne-cascade SBS bottleneck, amandla e-laser ye-Brillouin afinyelela ku-10 W magnitude, ebeka isisekelo sokwandisa ukusetshenziswa kwayo.
Indawo yokuhlangana evamile
Ngokuhlola okuqhubekayo kolwazi olusezingeni eliphezulu, ama-laser amancane abe yithuluzi elibalulekile ocwaningweni lwesayensi ngokusebenza kwawo okuhle kakhulu, njenge-laser interferometer LIGO yokuthola amagagasi adonsela phansi, esebenzisa i-single-frequency narrow linewidth.i-laserenobude be-wavelength obungu-1064 nm njengomthombo wembewu, kanye nobubanzi bomugqa wokukhanya kwembewu bungaphakathi kuka-5 kHz. Ngaphezu kwalokho, ama-laser anobubanzi obuncane anokuguquguquka kwe-wavelength kanye ne-no mode jump nawo abonisa amandla amakhulu okusebenzisa, ikakhulukazi ekuxhumaneni okuhlangene, okungahlangabezana kahle nezidingo ze-wavelength division multiplexing (WDM) noma i-frequency division multiplexing (FDM) yokuguquguquka kwe-wavelength (noma i-frequency), futhi kulindeleke ukuthi ibe yithuluzi eliyinhloko lesizukulwane esilandelayo sobuchwepheshe bokuxhumana beselula.
Esikhathini esizayo, ukusungulwa kwezinto ze-laser kanye nobuchwepheshe bokucubungula kuzothuthukisa kakhulu ukucindezelwa kobubanzi bomugqa we-laser, ukuthuthukiswa kokuzinza kwemvamisa, ukwanda kobubanzi bamaza kanye nokuthuthukiswa kwamandla, okuzovula indlela yokuhlola kwabantu umhlaba ongaziwa.
Isikhathi sokuthunyelwe: Novemba-29-2023