Excitation ntawm kev sib haum xeeb thib ob nyob rau hauv dav dav

Excitation ntawm kev sib haum xeeb thib ob nyob rau hauv dav dav

Txij li qhov kev tshawb pom ntawm qhov kev txiav txim thib ob ntawm nonlinear optical mob nyob rau hauv 1960, raws li qhov kev pom zoo dav, tau tsim los ntawm huab hwm ultraviolet mus rau qhov chaw nyob deb ntawmlasers, zoo heev txhawb kev txhim kho ntawm laser,ntawm qhov muagCov ntaub ntawv ua, kev daws teeb meem siab dav dav thiab lwm daim teb. Raws li nonlinearOpticsThiab Polarization lub tswv yim, qhov tseem ceeb ntawm norminear kho qhov muag yog qhov ua tau zoo rau cov siv leade symmetry, thiab cov nonffinear symmetry, thiab tus tsis tau caw tsis tau hauv cov xov xwm tsis zoo. Raws li qhov tseem ceeb tshaj plaws thib ob-cov nyhuv thib ob, tus neeg sib raug zoo thib ob thiab siv tau zoo thiab siv tau cov amorphous thiab cov symmetry ntawm Center inversion. Tam sim no, cov txheej txheem polarization (kho qhov muag ua kom zoo nkauj, hluav taws xob ua kom puas cov khoom siv kho mob ntawm cov khoom siv thib ob, thiab ua kom zoo dua kev ua haujlwm ntawm cov khoom siv thib ob ntawm nonlinearity ntawm optical fiber. Txawm li cas los xij, cov qauv no yuav tsum muaj cov thev naus laus zis thiab tuaj yeem ua tau raws li Qasi-theem txuam nrog kev txiav txim siab wavelength. Lub nplhaib ntsuas hluav taws xob kho qhov muag fiber ntau ntawm lub ncha phab ntsa hom txwv qhov kev paub dav dav ntawm qhov kev sib raug zoo thib ob. Los ntawm kev rhuav cov qauv zoo ib yam ntawm cov txheej txheem saum npoo av, cov teeb meem thib ob yog txhim kho kom muaj ntau yam, tab sis tseem nyob ntawm femtosecond twj tso kua mis nrog lub zog siab heev. Yog li ntawd, cov tiam ntawm kev txiav txim thib ob yog tsis muaj teeb meem ntawm kev hloov pauv ntawm cov neeg tsis muaj zog, yog cov teeb meem kho tshiab uas yuav tsum tau daws cov khoom siv dav dav, tshwj xeeb yog qhov tseem ceeb ntawm kev tshawb fawb thiab muaj qhov tseem ceeb ntawm kev tshawb fawb.

Ib pab neeg tshawb fawb hauv Suav teb tau npaj tseg ib daim ntawv txheej selened lead rau Crystal Theem Kev Sib Txuas Lus nrog micro-nano fiber ntau. Los ntawm kev coj kom zoo dua ntawm cov txheej txheem thib ob thiab ntau yam kev ua muaj muaj tseeb ntawm cov txheej txheem hloov dua siab tshiab thiab muaj ntau yam kev hloov pauv ntawm Fiber thiab ntau qhov kev npaj siab tshiab thiab cov kev npaj cov khoom siv hluav taws xob ntau duaQhov rooj los teeb tsaCov. Qhov kev zoo siab tshaj plaws ntawm tus thib ob harmonic thiab cov zaus ua ke nyob rau hauv cov phiaj xwm feem ntau yog nyob ntawm peb qhov tseem ceeb-teeb meem sib nrug deb ntawm galium selenide thiabMicro-Nano Fiber, lub siab-txiav txim siab yam thib ob uas tsis tau txiav txim siab ntawm ib daim fawm kib seltal, thiab theem sib txuam ntawm cov neeg muaj cov khoom siv doubrame ntau thiab zaus.

Hauv kev sim, lub micro-nano nano fiber npaj los ntawm cov nplaim hluav taws xob ntawm millimeter, uas muab cov khoom siv lub teeb ntev rau lub teeb thiab lub qhov thib ob Harman. Qhov thib ob-kev txiav txim nonlinear polarizabability ntawm cov kev sib xyaw ua ke Crystal Crystal Crystal ntau tshaj 170 PM, uas yog ntau dua li cov tsis muaj fiber ntau. Ntxiv mus, cov qauv kev txiav txim ntev ntev ntawm Gallium Selenide Crystal ua kom muaj kev sib raug zoo ntawm cov kev cuam tshuam ntxiv ntawm cov haujlwm tsis sib haum xeeb hauv micro-nano fiber ntau. Tseem ceeb tshaj, cov theem sib txuam ntawm lub tshuab tawm ntawm lub ntsej muag hom (EH11)

Cov ntsiab lus saum toj no nteg lub hauv paus rau cov txiaj ntsig zoo thiab dav-band paub txog kev sib haum xeeb thib ob hauv micro-nano fiber ntau. Cov kev sim qhia pom tias cov zis ntawm cov kev sib raug zoo thib ob ntawm cov nyom Laser tau ua tiav, thiab lub zog thib ob yog li ntau pua microwatts (daim duab 1). Ntxiv mus, thaum lub twj tso kua mis tau txuas ntxiv rau peb qhov sib txawv ntawm kev txuas ntxiv ua laser (W24, W2) Los ntawm hloov lub twj tso kua mis nrog ultra-radian lub teeb-emitt diode (sled) lub teeb ci nrog rau bandwidth ntawm 28.3 nm yog generated (daim duab 2). Ib qho ntxiv, yog tias cov tshuaj vapor deposition thev naus laus zis nyob rau hauv qhov kev kawm kom qhuav, thiab ob txhais lus thib ob muaj peev xwm hloov pauv tau ntev, thiab ua kom muaj zog thib ob muaj peev xwm ua tau zoo dua.

Daim duab. 1 Thib ob cov txheej txheem sib ntaus thiab ua rau txhua-fiber ntau cov qauv

Daim duab 2 Ntau nthwv dej sib xyaw thiab cov dav dav thib ob sib raug zoo nyob rau hauv kev nqus tawm tshiab