Laser tshwm sim tshuab rauKho Qhov Muag FiberHnov ib feem
Kev sib txuas lus roj siv kho qhov muag siv tau yog ib hom tshuaj thev naus laus zis thiab nws tau dhau los ua ib qho ntawm cov thev naus laus zis ntau tshaj plaws ntawm cov duab photoelectric. Kev siv kho qhov muag siv kho qhov muag siv tau yog tsuas yog tsim ntawm laser, kis tau cov fiber ntau, paub txog cheeb tsam kev ntsuas lossis lwm yam. Cov ntsiab lus piav qhia txog cov yam ntxwv ntawm lub teeb khiav xws li siv, nthwv dej, thiab lwm yam tuaj yeem hloov pauv ntawm cov khoom siv sab nraud hauv cov khoom siv kho mob. Piv txwv li, thaum sov, lim, kev ua kom zoo, kev sib hloov, kev sib hloov, cov kev hloov pauv ntawm kho qhov muag tau sib raug zoo. Kev saib xyuas cov fiber ntau yog ua raws cov kev sib raug zoo ntawm cov tsis sib xws thiab lwm yam sab nraud los kuaj pom cov khoom sib raug zoo.
Muaj ntau homLaser Tausiv hauv Optical fiber pom kev, uas tuaj yeem faib ua ob pawg: sib faibLaser kom muaj txiaj ntsigthiab incoherent teeb tsa, incoherentQhov rooj los teeb tsaFeem ntau suav nrog incandescent teeb thiab lub teeb-emitting dodes, thiab coherent teeb tsa suav nrog cov lasers zoo, kua roj av, roj av,Semiconductor laserthiabFiber laserCov. Cov hauv qab no yog feem ntau rau covLaser Lub TeebDav siv nyob rau hauv lub tshav teb ntawm fiber ntau kev xav nyob rau hauv xyoo tsis ntev los no: zaus dav dav ib zaug laser thiab dawb laser.
1.1 yuav tsum rau txoj kab nqaimLaser Teeb
Kev siv kho qhov muag siv kho qhov muag tsis muaj qhov system tsis tuaj yeem sib cais, xws li lub zog ntsuas hluav taws xob, lub zog ntsuas ntawm cov khoom siv kho hluav taws xob, ntsuas lub zog ntawm cov ntsuas hluav taws xob tawm ntawm cov ntsuas hluav taws xob thiab lwm yam Qhov tseeb, rhiab heev thiab lub suab nrov ua si ib lub luag haujlwm txiav txim siab. Nyob rau hauv xyoo tsis ntev los no, nrog kev txhim kho ntawm ntev-deb ultra-siab daws teeb meem ntawm kev siv laser fiber ntau, feem ntau yog nyob rau hauv ib qho kev ua lag luam laser ntau, feem ntau sau kev xav (artdr) thev naus laus zis siv Nrhiav tau kev siv thev naus laus zis los soj ntsuam lub nraub qaum ntawm cov kab mob ntawm cov khoom siv kho tshiab hauv qhov zaus, nrog kev tiv thaiv dav dav (ntau txhiab mais). Qhov zoo ntawm cov kev daws teeb meem siab (millimeter-theem daws teeb meem) thiab siab txog cov kev ntsuas ntsuas hluav taws xob hauv kev ntsuas cov ntsuas hluav taws xob thiab cov thev naus laus zis. Cov tub ntxhais ntawm isdr technology yog siv tunable teeb tau qhov chaw ua kom tiav qhov tseem ceeb ntawm cov khoom tseem ceeb, yog li kev ua haujlwm ntawm kev kuaj pom ntawm, rhiab thiab daws teeb meem. Thaum lub sij hawm reflection qhov kev sib nrug yog ze rau txoj kev sib tw ntev, qhov kev siv ntawm cov paib tuav yuav tau expenessentated los ntawm cov coefficiented ττhenuentated los ntawm cov coefficient τ-τC. Rau Gaussian lub teeb pom kev zoo nrog lub ntsej muag zoo nkauj, txhawm rau kom muaj kev sib tw ntau dua li 90% / F, uas txhais tau tias rau cov fiber ntau nrog ib ntev ntawm 80 km, kab dav ntawm lub teeb ci yog tsawg dua 100 hz. Tsis tas li ntawd, kev txhim kho lwm yam kev thov tseem tso rau tom qab cov kev yuav tsum tau muaj rau cov kab ntawm lub teeb ci. Piv txwv li, hauv lub qhov muag fiber hydrlophone system, kab ntawm lub chaw teeb txiav txim siab lub suab kaw lus tsawg kawg ntawm cov kab ke. Nyob rau hauv brillein lub sij hawm kho qhov muag refleflor (botdr), ntsuas kev daws teeb meem ntawm qhov kub thiab kev ntxhov siab yog tsuas yog txiav txim siab ntawm lub teeb ci. Nyob rau hauv ib tus resonator fiber Optic Gyro, Qhov Coherreence ntev ntawm lub teeb ci tuaj yeem nce ntxiv los ntawm tus resonator, li txhim kho txoj kab dav ntawm tus resonator ntawm tus resonator ntawm tus resonator ntawm tus resonator ntawm tus resonator, thiab ua kom ntsuas qhov ntsuas Qhov tseeb ntawm Fiber Optic Gyro.
1.2 Yuav Tsum Tau Txais Tus Kws Txiav Hlob
Ib leeg yoj lub viav vias cheb lub tshuab cheb tau yooj yim wavelengthing kev ua tau zoo, yog qhov tseem ceeb ntawm kev siv hluav taws xob ntawm cov khoom siv fiber ntau. Piv txwv li, hauv cov roj nkev roj kev xav, ntau hom roj muaj cov roj av sib txawv. Txhawm rau kom muaj kev nqus cov khoom haum thaum ntsuas cov roj sib npaug, nws yog qhov tsim nyog los ua kom haum lub teeb ci nrog qhov nqus tau ntawm cov roj av. Cov roj uas tuaj yeem kuaj pom yog qhov tseem ceeb txiav txim siab los ntawm nthwv dej ntawm lub qhov pom kev zoo. Yog li no, nqaim kab kab lasers nrog ruaj ruaj broadband txoj kev ua tau yooj yim dua nyob rau hauv xws li lub siab xav tau. Piv txwv li, hauv qee qhov faib tawm cov khoom siv hluav taws xob fiber ntau ntawm kev ua kom tau txais kev siv kho qhov muag, yog li cov cim kho kho kho tshiab , thiab lub sweep ceev ntawm tus kho laser tau kho tau feem ntau yuav tsum mus txog 10 teev tsaus ntuj / μs. Tsis tas li ntawd, nthwv dej tunted nqaim laywidth kuj tseem yuav siv dav hauv lidar, laser chaw taws teeb pom thiab cov kev ntsuas siab tshaj tawm thiab lwm daim duab zoo nkauj. Txhawm rau kom tau raws li qhov yuav tsum tau ua ntawm cov kev ua tau zoo ntawm kev ua kom zoo nkauj, lub hom phiaj ceev ntawm kev kawm ntau yam nqaim-dav nyob rau xyoo tsis ntev los no yog kom ua tiav siab Precision tuning nyob rau hauv ib tug loj wavelengthrength ntau raws ntawm kev mus nrhiav ultra-nqaim laser Laswidth, ultra-tsis muaj suab nrov, thiab ultra-ruaj khov tso zis ntau thiab lub zog.
1.3 Xav Tau Dawb Laser Laser Lub Teeb
Hauv kev pom zoo ntawm kho qhov muag, zoo-zoo dawb lub teeb laser yog qhov tseem ceeb los txhim kho kev ua haujlwm ntawm lub system. Tus dav dav ntawm Spectrum cov kev pab them rau lub teeb dawb lub teeb laser, qhov ntau ntxiv nws daim ntawv thov hauv cov khoom siv kho hluav taws xob. Piv txwv li, thaum siv cov fiber ntau bragg Grating (FBG) los tsim cov tshuab hluav taws xob, kev tsom xam lim lossis cov lim lim rau kev rhuav tshem. Tus qub qub siv lub spectrometer los ntsuas txhua tus fbg resonant wavelength hauv lub network. Cov tom kawg siv cov lim dej los taug qab thiab ntsuas FBG hauv kev hnov, ob qho tib si yuav tsum muaj lub teeb ci rau lub fbg. Vim tias txhua tus FBG kev nkag mus network yuav muaj qee qhov kev poob siab, thiab muaj kev sib tw ua ke ntawm ntau dua 0.1 nem, lub teeb ci broadband nrog lub zog dav dav thiab lub siab bandwidth. Piv txwv li, thaum siv lub sijhawm ntev ua haujlwm grating (LPFG) rau kev xav, txij li kev txiav txim siab ntawm ib qho kev txiav txim siab yog xav tau kom raug nws tus resonant Cov yam ntxwv siab tshaj plaws. Tshwj xeeb, Acoustic Fiber Grating (AFG) tsim los ntawm kev siv cov txiaj ntsig acousto-optical tau ua tiav txoj kev resonant wavelength mus txog 1000 los ntawm txoj kev siv hluav taws xob. Yog li ntawd, kev sib koom ua ke kev sib haum xeeb nrog xws li cov ultra-dav tuning ntau dua qhov kev sib tw zoo rau kev sib tw rau cov chaw dav dav. Ib yam li ntawd, nyob rau hauv xyoo tsis ntev los no, tilted bragg fiber grating tau tseem tau siv dav hauv thaj teb ntawm fiber ntau. Vim tias nws cov yam ntxwv ntau lub siab, lub wavelength faib ntau zaus tuaj yeem ncav cuag 40 nm. Nws cov kev xav tau mechanism feem ntau yog los sib piv cov kev sib txheeb ntawm ntau tus kis tau ntawm ntau qhov kis tau ntawm ntau qhov kis tau Peaks, yog li nws yog qhov tsim nyog los ntsuas nws kis spectrum kiag li. Lub bandwidth thiab lub zog ntawm cov teeb pom kev zoo tshaj plaws yog qhov yuav tsum tau ua kom siab dua.
2. Kev tshawb fawb nyob hauv tsev thiab txawv teb chaws
2.1 Linewidth Laser Teeb Qhov Chaw
2.1.1 Tsoo Kab Linewidth Semiconductor Faib Faib Faib Laser
Hauv 2006, cliche li al. txo cov MHz nplai ntawm cov semiconductorDfb laser(Muab faib tawm tswv yim Laser) mus rau Khaz nplai siv cov qauv hluav taws xob; Nyob rau xyoo 2011, kessler li al. siv qhov ntsuas kub tsawg thiab siab ruaj ntseg ib ce lead ua ke nrog cov tswv yim nquag tswj kom tau ultra-nqaim li ultra leater tawm ntawm 40 mHz; Hauv xyoo 2013, peng thiab cov tau ua semiconductor laser tawm nrog ib kab ntawm 15 kHz los ntawm kev siv cov qauv ntawm kev fabry sab nraud-pot (FP) lub tswv yim kev hloov kho. Cov lus qhia hluav taws xob feem ntau yog siv lub pas dej-kev ua kom muaj zog-niaj zaus stuffidization stuffidth ua kom lub teeb ci kom txo. Hauv xyoo 2010, Bernhardi li al. Tsim 1 cm ntawm erbium-doped alumina FBG ntawm silicon oxide substrate kom tau txais ib kab tso zis tawm ntawm li 1.7 KHz. Nyob rau tib lub xyoo, Liang li al. Siv lub tswv yim ntawm tus kheej ntawm Raylewh tawv Formed los ntawm ib tug siab-q eco phab ntsa Fassonator rau kab nqaim-dav Laser Laser ntawm 160 Hz.
Daim duab 1 (a) daim duab ntawm semiconductor laser kab kewidth fined raws li tus kheej-txhaj rayleigh tawg ntawm sab nraud yas resononator;
(b) Cov khoom siv tsis pub dawb
(c) Cov khoom siv hluav taws xob ntawm lub laser nrog Linewidth compressed rau 160 Hz
2.1.2 Tswb Lebwidth fiber ntau laser
Rau linear kab noj hniav fiber ntau lasers, nqaim kab lineaser tso tawm ntawm ib qho ntev ntawm tus resonator thiab nce cov longitudinal hom luv luv. Hauv 2004, spiegelberg li al. Tau ib qho ib qho kev tawm suab ntev Longwidth Linewidth Laser tso tawm nrog ib kab ntawm 2 KHz los ntawm kev siv DBR cov qauv kev noj kab mob luv luv. Nyob rau xyoo 2007, Shen li al. Siv 2 cm ntau erbium-doped silicon fiber ntau los sau cov fiber ntau, ua rau nws cov kab lus tso tawm suab, ua rau cov kab tso zis laser kab dav tsawg dua 1 kHz. Hauv xyoo 2010, Yang li al. Siv 2cm mas doped luv linar kab noj hniav ua ke nrog ib tug barpeband FBG lim kom tau ib qho LEATITUDITE hom LEWTH ntawm tsawg dua 2 KHz. Hauv xyoo 2014, pab pawg tau siv cov kab ke luv luv linear (virtual folded nplhaib resonator) ua ke nrog ib tug laser kab dav, raws li qhia hauv daim duab 3. Xyoo 2012, CAI li al. Siv ib qho kev tsim tawm 1.4cm luv kab kab noj hniav kom tau txais cov ntawv tso zis laser laser laser laser laser laser laser laser laser laser laser ntau dua 1140.3 nm, thiab ib txoj kab dav ntawm 4.1 Khz. Hauv xyoo 2013, Meng li al. Siv brille_ doptering ntawm erbium-doped fiber ntau nrog lub nplhaib luv-bias ntawm ib hom kev tawm tsam tag nrho, cov suab nrov qis laser tso tawm nrog cov zis zog ntawm 10 mW. Xyoo 2015, pab pawg siv lub nplhaib kab ke ntawm 45 cm erbium-doped fiber ntau li lub brillein scattering tau txais qhov nruab nrab thiab nqaim lineater.
Daim duab 2 (a) kos duab kos duab ntawm SLC fiber ntau laser;
(b) linceape ntawm heterodyne teeb liab ntsuas nrog 97.6 KM fiber ntau qeeb
Lub Sijhawm Post: Nov-20-2023