Cov khoom siv teeb pom kev zoo waveguide yog ib feem tseem ceeb ntawm cov kab ke sib txuas lus optical. Cov khoom siv no yog siv los teeb tsa waveguides kom raug rau ntawm lub substrate kom ntseeg tau tias lawv tuaj yeem xa cov cim tau raug thiab ua haujlwm tau zoo. Ib qho ntawm cov substrates siv feem ntau rau cov khoom siv no yog granite. Txawm li cas los xij, thaum granite muaj ntau qhov zoo, kuj tseem muaj qee qhov tsis zoo uas tuaj yeem cuam tshuam rau cov txheej txheem sib dhos.
Granite yog ib lub pob zeb ntuj uas tawv thiab ruaj khov, uas ua rau nws zoo tagnrho rau kev siv ua lub hauv paus hauv cov khoom siv teeb pom kev zoo waveguide. Nws muaj kev ruaj khov thermal zoo heev thiab tiv taus cov teebmeem ib puag ncig, uas ua kom nws tuaj yeem tswj nws cov duab thiab cov qauv dhau sijhawm. Granite kuj muaj cov coefficient qis ntawm thermal expansion, uas txhais tau tias nws tsis deform tseem ceeb thaum raug rau qhov kub thiab txias hloov pauv. Tus cwj pwm no yog qhov tseem ceeb vim nws ua kom cov waveguides tsis txav lossis hloov pauv vim thermal expansion.
Ib qho ntawm cov teeb meem tseem ceeb ntawm granite yog nws qhov roughness ntawm qhov chaw. Granite muaj qhov porous thiab tsis sib npaug uas tuaj yeem ua rau muaj teeb meem thaum lub sijhawm sib dhos. Txij li thaum waveguides xav tau qhov chaw du thiab tiaj tus kom ntseeg tau tias lawv tuaj yeem xa cov cim qhia kom raug, qhov chaw ntxhib ntawm granite tuaj yeem ua rau lub teeb liab poob thiab cuam tshuam. Ntxiv mus, qhov chaw ntxhib tuaj yeem ua rau nws nyuaj rau sib dhos thiab tso cov waveguides kom raug.
Lwm qhov tsis zoo ntawm granite yog nws qhov brittleness. Granite yog ib yam khoom siv tawv thiab ruaj khov, tab sis nws kuj brittle. Qhov brittleness ua rau nws yooj yim rau kev tawg, chipping, thiab tawg thaum raug kev ntxhov siab thiab siab. Thaum lub sijhawm sib dhos, qhov siab thiab kev ntxhov siab uas siv rau ntawm granite substrate, xws li los ntawm cov txheej txheem mounting, tuaj yeem ua rau muaj kev tawg lossis chips uas tuaj yeem cuam tshuam rau kev ua haujlwm ntawm waveguides. Qhov brittleness ntawm granite substrate kuj txhais tau tias nws yuav tsum tau ua tib zoo tuav kom tsis txhob muaj kev puas tsuaj thaum lub sijhawm thauj mus los thiab kev teeb tsa.
Granite kuj tseem muaj kev phom sij rau cov dej noo thiab cov av noo, uas tuaj yeem ua rau nws nthuav dav thiab cog lus. Thaum raug dej noo, granite tuaj yeem nqus dej, uas tuaj yeem ua rau nws o thiab tsim kev ntxhov siab hauv cov khoom siv. Qhov kev ntxhov siab no tuaj yeem ua rau muaj kev tawg loj lossis txawm tias qhov ua tsis tiav ntawm lub substrate. Dej noo kuj cuam tshuam rau cov nplaum siv hauv cov txheej txheem sib dhos, uas tuaj yeem ua rau cov ntawv cog lus tsis muaj zog, ua rau muaj teeb meem xws li poob teeb liab.
Xaus lus, thaum granite yog ib qho substrate nrov rau cov khoom siv optical waveguide positioning, nws tseem muaj qee qhov tsis zoo uas tuaj yeem cuam tshuam rau cov txheej txheem sib dhos. Granite qhov chaw ntxhib tuaj yeem ua rau lub teeb liab poob, thaum nws qhov brittleness ua rau nws yooj yim tawg thiab chipping nyob rau hauv siab. Thaum kawg, noo noo thiab av noo tuaj yeem ua rau puas tsuaj loj rau lub substrate. Txawm li cas los xij, nrog kev ua tib zoo tuav thiab kev saib xyuas kom meej, cov qhov tsis zoo no tuaj yeem tswj tau zoo kom ntseeg tau tias muaj kev ua haujlwm zoo tshaj plaws ntawm cov khoom siv waveguide positioning.
Lub sijhawm tshaj tawm: Lub Kaum Ob Hlis-04-2023