Laser tshwm sim tshuab rau Optical Fiber Sensing Tshooj Ob

Laser tshwm sim tshuab rau Optical Fiber Sensing Tshooj Ob

2.2 Ib qho wavelength rov qab chebLaser Tau

Qhov tseeb ntawm laser ib nthwv dej cheb yog qhov tseem ceeb los tswj cov khoom siv lub cev ntawm lublaserCARYity (feem ntau yog qhov chaw nruab nrab ntawm cov kev tswj hwm kev tswj hwm thiab xaiv cov oscillating ntev ntev, thiaj li ua tiav lub hom phiaj ntawm kev tawm ntawm cov zis tawm. Raws li cov ntsiab cai no, thaum ntxov li xyoo 1980, yog kev txheeb xyuas lub ntsej muag muaj fiber ntau, thiab xaiv lub Laser Ciaj uas muaj kev sib hloov thiab kev xaiv cov kev sib tsoo. Xyoo 2011, ZHU li al. Siv cov taub lim lim kom ua tiav ib qho-wavelength tunable laser tso tawm nrog txoj kab nqaim. Xyoo 2016, Rayleigh Linewidth Cableism tau thov kom ua tiav dual-wavelengthing tab sis saib xyuas tib lub sijhawm, tau txais txoj hlua khi ntawm 3 nm. Dual-wavelength ruaj khov tso zis nrog kab kab dav ntawm kwv yees li 700 hz. Hauv 2017, ZHU li al. siv graphene thiab micro-nano nano fiber bragg grating kom ua tiav graphene ze li ntawm graphene ze li ntawm 1550 hz thiab photocontrolled ceev thiab Yog hais tias scanning ntawm 700 Mhz / ms nyob rau hauv lub wavelength ntau ntawm 3.67 nm. Raws li pom hauv daim duab 5. Cov nthwv dej saum toj no tau paub txoj kev xaiv laser yog qhov ncaj qha lossis tsis ncaj qha hloov lub cuab yeej hla hauv lub laser kab noj hniav.

Daim duab 5 (a) Kev sim teeb tsa ntawm lub wensical-monsecable wavelength-tunable fiber hlau laserthiab ntsuas kev ntsuas;

(b) Tso zis rau cov zis 2 nrog kev txhim kho ntawm lub luag twj tso kua mis

2.3 Dawb Laser Laser Teeb

Kev tsim kho cov teeb pom kev zoo tau muaj ntau theem xws li Halogen Tungsten Teeb, Kev DeuterIcium,Semiconductor laserthiab supercontinuum lub teeb ci. Tshwj xeeb, lub teeb ci supercontinuum lub teeb ci, nyob rau hauv qhov expitation ntawm favegentide nrog ntau qhov kev txiav txim siab, thiab lub zog uas tsis muaj zog, thiab lub zog tsis muaj zog, thiab lub zog los npog lub teeb kom ze rau infrared, thiab muaj lub zog sib zog. Tsis tas li ntawd, los ntawm kev kho cov dispersion thiab tsis muaj fiber ntau, nws cov spectrum tuaj yeem txuas ntxiv mus rau nruab nrab-infrared band. Qhov peev txheej laser tau zoo heev hauv ntau thaj teb, xws li txheej txheem kho qhov muag, kev tshuaj kom pom, kev siv roj ntsha thiab yog li ntawd. Vim tias qhov kev txwv ntawm lub teeb nruab nrab ntawm lub teeb nruab nrab, thaum ntxov supercontinuum spectrum yog tsim tawm los ntawm khov kho kho qhov muag iav kom tsim lub supercontinuum spectrum hauv cov khoom pom. Txij thaum ntawd los, cov tshuaj muaj roj pib tau yooj yim los ua qhov nruab nrab zoo tshaj plaws rau tsim kom muaj dav dav dav hlau me me notefficient thiab me me kis hom teb. Lub ntsiab tsis muaj kev cuam tshuam nrog plaub-yoj sib xyaw, raman tawg, thiab lwm yam ntawm cov nyhuv ntawm txhua cov nyhuv kuj txawv raws li lub Mem tes dav ntawm cov mem tes kom zoo thiab dispersion ntawm cov fiber. Feem ntau, tam sim no lub teeb ci supercontinuum yog feem ntau yog txhim kho cov laser fais fab thiab nthuav dav ntau, thiab xyuam xim rau nws txoj kev tswj hwm.

3 Ntsiab Lus 3

Daim ntawv no sau cov ntsiab lus thiab tshuaj xyuas cov laser ntau siv los txhawb cov tshuab fiber ntau, suav nrog txoj kab nqaim, tib lub ntsej muag zoo nkauj. Laser dawb. Daim ntawv thov yuav tsum tau ua thiab kev nthuav dav ntawm cov lasers hauv thaj teb ntawm fiber ntau kev pom zoo tau qhia hauv kev nthuav dav. Los ntawm kev txheeb xyuas lawv cov kev xav tau thiab kev txhim kho ntawm cov txiaj ntsig zoo rau cov kev pom zoo ultra Yog li ntawd, peb pib nrog kab nqaim dav dav Laser Dav Dav Hlau Laser Laser Laser Zoo Tshaj los ntawm kev saib xyuas kev pom zoo los ntawm kev txhim kho lawv txoj kev txhim kho.