Tignoolajiyada isha Laser ee Dareenka Fiber Optic Qaybta Labaad
2.2 Xaaq mawjada keliyaisha laysarka
Xaqiijinta xaaqidda mawjadaha hal mawjadaha ee laser-ka ayaa asal ahaan ah in la xakameeyo sifooyinka jireed ee aaladdaleysarkadalool (sida caadiga ah wavelength xarunta of bandwidth ka hawlgala), si ay u gaaraan kantaroolka iyo doorashada ee hab dhererka oscillating ee godka, si loo gaaro ujeedada hagaajinta hirarka wax soo saarka.Iyada oo ku saleysan mabda'an, horaantii 1980-meeyadii, xaqiijinta lasers-fiber-tunable ayaa inta badan lagu gaarey iyada oo lagu beddelayo wejiga dhamaadka laysarka oo leh shabag-dhaqaajin milicsi leh, iyo xulashada habka godka laysarka iyada oo gacanta lagu beddelayo lana hagaajinayo shabaqyada diffraction.Sannadkii 2011, Zhu et al.filtarrada tunable loo isticmaalo si loo gaaro wax soo saarka laser-mawjada-mawjadaha tunable leh oo leh xariiq cidhiidhi ah.Sannadkii 2016, habka isku xidhka laydhka ee Rayleigh ayaa lagu dabaqay isku xidhka laba-mawjadaha dhererka ah, taas oo ah, culayska ayaa lagu dabaqay FBG si loo gaadho habaynta laysarka laba-mawjadaha dheer, iyo xadhkaha leysarka wax-soo-saarka ayaa la kormeeray isla mar ahaantaana, iyadoo la helayo dhererka dhererka dhererka ee 3 nm.Wax soo saarka laba-mawjadaha dhererka leh ee deggan oo leh ballac xariiq oo ku dhow 700 Hz.2017, Zhu et al.loo isticmaalo graphene iyo micro-nano fiber Bragg grating si ay u sameeyaan shaandheyn la taaban karo oo dhan, oo ay weheliso tignoolajiyada cidhiidhiga laser Brillouin, waxay adeegsatay saamaynta photothermal ee graphene ee u dhow 1550 nm si loo gaadho xadhkaha leysarka sida ugu hooseeya 750 Hz iyo sawir la xakameeyey oo degdeg ah iskaanka saxda ah ee 700 MHz/ms ee baaxadda hirarka dhererka 3.67 nm.Sida ku cad Jaantuska 5. Habka xakamaynta mawjada dhererka ee kor ku xusan wuxuu asal ahaan ogaanayaa xulashada habka laserka iyadoo si toos ah ama si aan toos ahayn u beddelaysa mawjada dhexe ee baska ee qalabka ee godka laysarka.
Jaantuska 5 (a) Habaynta tijaabada ah ee mawjadaha dhererka indhaha ee la xakamayn karo-laser fiber tunableiyo habka cabbirka;
(b) Soo-saarka spectra ee soo-saarka 2 oo leh kobcinta bamka xakamaynta
2.3 Isha iftiinka laser cad
Horumarinta isha iftiinka cad waxay soo martay heerar kala duwan sida nalka halogen tungsten, nalka deuterium,laser semiconductoriyo isha iftiinka supercontinuum.Gaar ahaan, isha iftiinka supercontinuum, ee hoos yimaada dareenka femtosecond ama picosecond oo leh awood ku meel gaar ah, waxay soo saartaa saameyn aan toos ahayn oo amarro kala duwan ah oo ku jira waveguide, iyo spectrum si weyn ayaa loo ballaariyay, kaas oo dabooli kara bandka iftiinka muuqda ilaa infrared u dhow. wuxuuna leeyahay isku xirnaan xooggan.Intaa waxaa dheer, iyada oo la hagaajinayo kala firdhinta iyo kala-soocidda fibre-ga gaarka ah, muuqaalkeeda ayaa xitaa lagu kordhin karaa qaybta dhexe ee infrared.Ilaha laser-ka noocan ah ayaa si weyn loogu dabaqay dhinacyo badan, sida sawir-qaadista isku xirnaanta indhaha, ogaanshaha gaaska, sawir-qaadista noolaha iyo wixii la mid ah.Sababo la xiriira xaddidaadda isha iftiinka iyo dhexdhexaadka aan tooska ahayn, spectrum hore ee supercontinuum waxaa inta badan soo saaray laser-state adag oo bamgareynaya muraayadaha indhaha si loo soo saaro spectrum supercontinuum ee baaxadda muuqata.Tan iyo markaas, fiber indhaha ayaa si tartiib tartiib ah u noqday dhexdhexaad heer sare ah oo soo saarida wideband supercontinuum sababtoo ah iskuxirnaan weyn oo aan toos ahayn iyo goobta habka gudbinta yar.Saamaynta ugu muhiimsan ee aan tooska ahayn waxaa ka mid ah isku-dhafka afarta-mawjadaha, xasillooni-darrada is-beddelka, is-beddelka is-beddelka, is-beddelka isku-dhafka ah, kala-baxa soliton, kala firdhinta Raman, isbeddelka is-soo-celinta soliton, iwm., iyo saamiga saameyn kastaa wuu ka duwan yahay marka loo eego ballaca garaaca garaaca garaaca wadnaha iyo kala firidhsan ee fiber.Guud ahaan, hadda isha iftiinka supercontinuum wuxuu inta badan u jeedaa hagaajinta awoodda laysarka iyo ballaarinta baaxadda muuqaalka, oo fiiro gaar ah u yeelo xakamaynta isku xirnaanta.
3 Kooban
Warqadani waxay soo koobaysaa oo ay dib u eegis ku samaynaysaa ilaha laysarka ee loo isticmaalo in lagu taageero tignoolajiyada dareenka fiber-ka, oo ay ku jiraan leysarka laydhka ah ee cidhiidhiga ah, leysarka hal mar oo la hagaajin karo iyo laysar cad oo baladhan.Shuruudaha codsiga iyo heerka horumarka ee laysarkaas ee berrinka dareenka fiber-ka ayaa si faahfaahsan loo soo bandhigay.Marka la falanqeeyo shuruudahooda iyo heerka korriintooda, waxaa la soo gebogebeeyey in isha laser-ka ugu fiican ee dareenka fiber-ku uu gaari karo wax-soo-saarka laysarka aadka u cidhiidhiga ah iyo ultra- xasilloon koox kasta iyo wakhti kasta.Sidaa darteed, waxaan ku bilaabeynaa laser ballarka xariiqda cidhiidhiga ah, laser ballac xariiqa cidhiidhi ah oo la hagaajin karo iyo leysarka iftiinka cad ee faa'iidada ballaaran leh, oo aan ogaano hab wax ku ool ah oo lagu xaqiijin karo isha laser ugu habboon ee dareenka fiber-ka iyadoo la falanqeynayo horumarkooda.
Waqtiga boostada: Nov-21-2023