Kev tshawb nrhiav txheej xwm Photonic Crystal Fiber Gratings

Lub photonic siv lead ua fiber ntau grate nws cov keeb kwm inevitability. Nws tau hais tias qhov tsim muaj photonic crystal fiber gratings muaj keeb kwm inevitability, vim science thiab technology yog nyob rau hauv tus txheej txheem ntawm kev loj hlob nruam. Thaum twg cov tshuaj tshiab pom lawm, yuav muaj kev sib tw tshiab hauv cov yeeb yaj kiab uas nyob ib puag ncig cov khoom no, uas yog, thaum photonic muaju tshiab thiab cov khoom tshiab tau pom thiab tsim tawm. Lub fiber ntau grating uas surrounds photonic muaju yuav tsim cov ntaub ntawv tshiab - photonic siv lead ua fiber ntau gratings.

Txij thaum Xyoo 1978 los ua cov thawj cov nplua nyeem, fiber ntau gratings nkag mus rau txhua qhov ntawm lub neej, tshwj xeeb tshaj yog kev siv fiber ntau kev sib txuas thiab fiber optic kev xav, thiab nws daim ntawv thov coj tau cov lej tawm mus rau lub hlwb kev xav. FBG yog tsim los ntawm kev hloov qhov kev txhawj xeeb ntawm txoj haujlwm sau rau ntawm ib feem ntawm qhov chaw ntawm cov tub ntxhais ntawm cov khoom siv fais fab rau hauv ib qho kev ua haujlwm, kom cov tub ntxhais thiab cov kev sib txawv ua sib txawv ntawm kev sib txawv ntawm hom sib txawv (reflected ntawm txoj kab sib txuas thiab xav txog kab). Cov yam ntxwv. Nws tuaj yeem siv rau kev kuaj xyuas thiab kev soj ntsuam ntawm lub kaw lus (sensor system), xws li kev saib xyuas ntawm lub siab ntawm tus choj kom muaj kev ruaj ntseg ntawm tus choj, uas yog siv los ntawm ntau yam kev sib tw, cov nplua nyeem yuav ua kom muaj me ntsis Hloov kev txhawj xeeb hauv kev txhawj xeeb, Qhov kev hloov me me ntawm kev hloov ntawm lub zog yuav ua rau lub nruab nrab ntawm qhov kev sib kis (los sis xav txog spectrum) ntawm cov nyom grating txav los ntawm ob peb lub nm, thiab paub cov choj los txhawb nqa lub siab nyob rau ntawm lub sijhawm. Ntxiv rau txoj kev nyab xeeb ntawm pej xeem cov chaw xws li txuas hniav, nws tuaj yeem siv rau ntau lub lag luam xws li lub tswb, kev sib tsoo, thiab cov khoom siv kho mob. Daim ntawv thov kev lag luam loj heev Bragg gratings tau txhawb cov kev loj hlob ntxiv thiab kev loj hlob ntawm nws cov kev tshawb xav thiab nteg ib qho qauv theoretical foundation rau photonic siv lead ua fiber ntau gratings.

Los ntawm 1987 Yablonovith npaj cov photronic muaju, uas tam sim ntawd attracted cov xim ntawm ntau cov neeg ua haujlwm scientific. Lawv paub tseeb tias qhov no yuav ua rau muaj kev hloov hauv cov khoom ua haujlwm. Kev kho ntawm lub diav hluavtaws txhua zaus ntawm cov duab ua siv photonic yuav ua rau cov photon yuav zoo ib yam li cov electron hauv lub siv lead ua los ua kom muaj lub zog band thiab tsim cov tshuab fais fab, kom lub era ntawm hluav taws xob zoo rau lub sijhawm ntawm lub teeb. Nrog rau cov neeg lub siab xav kom pom lub hnub nyoog, cov qauv theoretical thiab kev tsim ntau ntawm photonic muaju yog cov loj hlob sai. Tsis ntev, photonic siv lead ua fibers tau npaj siab nyob rau hauv 1992, thiab hauv 1996 Knight thiab lwm tus neeg ua cov thawj cov siv lead ua photonic. Fiber optics muaj revolutionized tsoos fiber ntau optics. Nws ua kom tiav qhov teeb meem uas ib txwm ua rau mob taub hau ntawm cov khoom siv fiber ntau. Piv txwv li, qhov teeb meem tsis zoo ntawm kev siv fais fab, kev siv lub teeb pom kev zoo yog kev siv lub teeb nyob rau hauv kev sib kis mus rau ciam av ntawm lub cladding thiab lub ntiaj teb sab nraud los tsim tag nrho cov kev xav kom xa tawm qhov muag ntsig txog qhov muag, yog hais tias lub fiber yog khoov rau qee yam, ua rau lub teeb nyob rau hauv lub interface tsis txaus siab tag nrho cov kev xav ntawm tus mob thiab feem ntau kis mus rau sab nraud ntiaj teb, li no poob lub teeb liab. Photonic siv lead ua fibers yog txawv. Photonic siv lead ua fiber ntau ntawm kev tshawb nrhiav qhov tseeb hais tias yog lub teeb kis tau ntog los ntawm qhov kev sib tw ntawm photonic siv lead ua, lub teeb tsis tuaj yeem propagate nyob rau hauv cov siv lead ua photron txawm hais tias cov fiber ntau khoov los yog khoov duav. Tej zaum yuav muaj peev xwm loj heev. Piv txwv li, cov yam ntxwv ntawm cov khoom siv sib xyaw ua kom muaj teeb meem ntawm cov hluav taws xob photronic muaj peev xwm ua kom cov kev xav tau ntawm fiber ntau qhov sib kis tau yooj yim. Kev siv ntau ntawm photonic siv lead ua fibers kuj kwv yees cov cim ntawm photonic siv lead ua fiber ntau gratings.

Tsis ntev tom qab xyoo 1999, Eggleton li al. tsim thawj photonic siv lead ua fiber ntau hauv qhov kev kuaj thiab tshawb xyuas thiab ntsuas nws cov yam ntxwv. Nws txoj kev vam meej qhib qhov rooj qhib qhov rooj rau ntawm photonic siv lead ua fiber ntau gratings. Tom qab, yuav luag txhua txhua xyoo, ntau cov kws tshawb fawb tau tsim ntau hom photonic siv lead ua fiber ntau gratings. Saib ntawm qhov teeb meem zuag qhia tag nrho, cov photronic siv lead ua fiber ntau grating yog ua tau ib qho kev tsis pom zoo thiab kev ua haujlwm ntawm cov khoom siv hauv tsev. Cov sau txog ntau yam yees siv (fiber grating, photonic siv lead ua, photonic fiber ntau fiber ntau) thiab integrated photonic crystal fiber ntau, nws muaj qhov zoo ntawm ntau cov technologies, nws yuav ua tau raws li qhov xav tau ntawm lub zej zog.

Kev tshawb nrhiav txheej xwm ntawm Photonic Crystal Fiber Gratings nyob rau hauv Suav teb

Rau photonic siv lead ua fiber ntau gratings, Tuam Tshoj tau ua ntau txoj kev tshawb fawb ntawm nws, thiab tau tiav zoo heev kev tshawb nrhiav tau. Nyob rau thaum ntxov, lub koom haum ntawm Modern Optics ntawm Nankai University tau lees paub qhov kev tsim ntawm Bragg fiber ntau grating siv ib daim npog theem qauv hauv photonic siv lead ua fiber ntau nrog hydrogen sensitization. Nyob rau hauv 2004, Zhi li al. tsom tau tias ntev-ntev fiber ntau grating-ntev fiber ntau grating simulation tsom tau pom tias cov resonant wavelength ntawm long-period fiber ntau muaj ib cov-monotonic hloov rau lub grating period, thiab rau ib lub sij hawm grating, muaj ntau Resonant wavelength. Nyob rau hauv 2005, Fu li al siv ib lub lens ultraviolet femtosecond laser los sau ib lub fiber ntau Bragg grating ntawm lub ntshiab silicon photonic siv lead ua fiber ntau, thiab txoj kev sau ib grating nrog tus kis ntawm 10 dB thiab qhov nruab nrab refractive index hloov siab tshaj 4 × 10-4. Wang li al siv CO2 laser pulses los sau ntev-ntev fiber ntau gratings nrog high-strain rhiab heev (-7.6pm / με) thiab tsawg-kub rhiab heev (3.91pm / oC) ntawm photonic siv lead ua fibers. Cov teeb meem uas ua nrog rau cov ntev li ntawm fiber ntau gratings tuaj yeem ua qhov txo ntawm qhov kev nyuab siab ntawm kev ntxhov siab thiab kub, thiab qhov ntsuas kub ntawm qhov kev ntsuas qhov ntsuas yog tsuas 0.5 με / oC uas tsis tas siv cov nyiaj raug them. Hauv xyoo 2007, Li Yan et al. siv cov nqaj ntawv propagation txoj kev los kawm txog hom kev ntuag ntawm hom khoom-doped photonic siv lead ua ntsej muag Bragg gratings. Peb qhov xwm txheej uas muaj kev txaus siab rau cov lus teb rau cov lus nug uas txaus siab heev rau hauv lub tshuab fais fab siv Bragg grating yog: qhov sib txuam theem, lub tebchaw hluavtaws nyob hauv thaj av grating thiab cov lus teb coj los ua kom zoo siab (piv txwv li txaus siab qhov kev sib raug zoo : Vpcf> π). Nyob rau hauv 2008, Wang et al. ntse ua cov ntaub ntawv ntev ntev rau ntawm cov khoob-cov tub ntxhais kev photonic bandgap fibers siv cov high-frequency luv luv-CO2 pulsed lasers. Kev sojntsuam ntawm nws tus yam ntxwv qhia tau hais tias qhov LPG no tseem muaj cov kab mob siab heev thiab ua rau tsis hnov qab kub, khoov, thiab qis qis dua. Nws tuaj yeem siv los ua cov cim sensors tsis muaj teeb meem ntawm kev sib tsoo ntawm qhov kub thiab txias, curvature thiab refractive index. Li Zhiquan li al. npaj lub tswvyim thiab kev tsom xam cov qauv siv ntawm photonic siv lead ua los kawm qhov sampling fiber ntau grating. Cov cwj pwm ntawm kev xav ntawm cov zauv ntawm cov zauv feem ntau tau kawm los ntawm cov kev xav ntawm cov siv lead ua photron thiab muab piv nrog cov txiaj ntsim tau los ntawm kev siv cov zauv ntawm cov zauv ntawm cov zauv. Cov cwj pwm ntawm cov qauv theoretical siv photonic muaju thiab cov tsom siv cov qauv ntawm kev ua qauv-coupling txoj kev xav tau. Jin et al. siv 193 nm ArF excimer laser sau Bragg gratings nyob rau hauv high-doped erbium-doped PCFs, uas zoo heev tuaj rau lub rooj vag grating efficiency, thiab tag nrho raug lub sij hawm raug mob tsawg dua 180 vib nas this. Nyob rau hauv 2009, Zhang li al. siv beam propagation los kawm txog cov nyhuv ntawm cov kab hauv nruab nrab ntawm ib qho erbium-doped photonic siv lead ua fiber ntau Bragg grating. Qhov kev tshuaj ntsuam pom tau hais tias cov qhov khaus qhov tob yuav ua rau lub Bragg resonance wavelength hloov mus rau ib lub sijhawm luv luv, nce qhov txawv ntawm lub Bragg center wavelength tus nqi λB thiab tus nqi ntev λ1 ntawm tus neeg nyob ze ze ze lobe (ie, λB-λ1), thiab kuj tuaj yeem cuam tshuam rau kev sib koom tes coefficient. Tam sim no photonic siv lead ua fiber ntau grating kuj yog lub ntsiab lus kub hauv ntiaj teb. Ntau thiab ntau cov kws tshawb fawb nyob hauv Suav teb tau nqis peev rau hauv nws, ua tus pab rau Suav txoj kev kawm thiab kev siv tshuab.