Qhia rau Fiber Optic Couplers
Ib qho fiber optic coupler yog ib lub tshuab siv fiber ntau hauv cov tshuab fiber optic nrog ib los yog ntau cov tswv yim fibers thiab ib qho los yog ntau cov zis hluav taws xob, uas txawv ntawm WDM. WDM multiplexer thiab demultiplexer sib faib qhov sib txawv ntawm qhov sib txawv ntawm fiber ntau mus rau ntau txoj hauv kev, thaum fiber ntau optic couplers sib faib lub teeb zog thiab xa mus rau ntau lub channel.
Bandwidth
Feem ntau cov couplers ua hauj lwm hauv ib qho kev txwv ntawm wavelength nkaus xwb (ib qho kev siv bandwidth xwb), vim tias qhov sib zog muaj zog yog wavelength-nyob ntawm tus kheej (thiab feem ntau kuj tuaj yeem nrog cov tub-ntxhais sib txawv). Qhov no yog ib qho cuab yeej ntawm cov couplers uas lub coupling tshwm sim dhau ib qhov ntev. Cov kab nrig ntawm cov fused couplers yog ob peb lub kaum ntawm nanometers. Nyob rau hauv high-power fiber lasers thiab amplifiers, ntau lub tshuab fiber ntau multimode fiber ntau siv rau kev sib koom ntawm ntau lub laser diodes thiab xa lawv mus rau hauv puab txoj hlua ntawm cov ciaj sia.
Qauv
Ib qho yooj yim fiber ntau optic coupler muaj N cov chaw nres nkoj tawm tswv yim thiab M cov chaw nres nkoj tso tawm. N thiab M feem ntau yog li ntawm 1 mus txog 64. M yog tus naj npawb ntawm cov chaw nres nkoj (ib los yog ntau tshaj). N yog tus lej ntawm qhov chaw nres nkoj tawm thiab yeej ib txwm muaj sib npaug los yog siab tshaj M. Cov naj npawb ntawm cov kev tawm tswv yim thiab cov zis tawm sib txawv nyob ntawm seb daim ntawv thov rau qhov coupler.
Lub teeb los ntawm cov khoom siv fais fab tuaj yeem tshwm ntsej muag ntawm ib qho los yog ntau tshaj tawm, nrog rau kev faib hluav taws xob uas nyob ntawm seb lub wavelength thiab polarization. Xws li cov couplers tau muab los ua ntau txoj hauv kev:
Qee cov couplers siv cov ntaub sab sib tshuam, muab kev nkag tau rau cov tub ntxhais fiber ntau;
Couplers tseem tuaj yeem ua los ntawm cov thooj av loj, piv txwv li nyob rau hauv daim ntawv ntawm microlenses thiab nqaj splitters, uas tuaj yeem ua ke rau cov fibers ("fiber-tailed").
Hom
Fibre optic couplers yuav yog cov khoom siv los yog cov khoom siv tsis ua haujlwm. Passive fibre optic couplers yog qhov yooj yim fiber ntau optic uas yog siv los mus rau redirect lub teeb tsis. Passive couplers yog siv cov micro-lo ntsiab muag, grade-refractive-index (GRIN) rods thiab nqaj splitters, optical mixers, los yog splice thiab fuse cov tub ntxhais ntawm cov qauv fibers ua ke. Muaj fiber ntau optic couplers yuav tsum muaj lwm lub hwj chim. Lawv tau txais cov lus qhia tawm tswv yim, thiab siv cov khoom siv hluav taws xob ua kom pom zoo, cov twj siv hluav taws xob, thiab cov teeb pom kev zoo kom xa tawm cov ntawv tawm suab paj hlwb.
Hom fiber ntau optic couplers muaj optical splitters, optical combiners, X couplers, lub hnub qub couplers, thiab cov couplers ntoo. Lub cuab yeej tso cai rau kev sib kis ntawm lub teeb tsis muaj ntau txoj hauv kev.
Cov fused couplers siv los faib cov kev pib qhov nruab nrab ntawm ob lub fibers, los yog mus muab cov kev pib ntsaws los ntawm ob lub fibers mus rau hauv ib lub fiber ntau. Lawv tsim los ntawm fusing thiab tapering ob fibers ua ke. Txoj kev no muab ib qho yooj yim, rugged, thiab kev cog lus ntawm kev faib thiab sib koom siv qhov pib ntsaws qhov muag. Feem ntau cov kev poob qis yog tsawg li 0.2dB, thaum splitting cim yog muaj tseeb nyob rau hauv ± 5 feem pua ntawm cov tsim wavelength. Cov cuab yeej no yog ob txoj hauv kev, thiab muab qis qis dua. Cov txheej txheem yog qhov zoo tshaj plaws haum rau singlemode thiab multimode couplers.
Kev xaiv rau fiber ntau optic coupler kuj muaj xws li Xaiv cov qhov nqaim nqaim, Lub qhov rais qhib dav hlau, thiab Dual window Wide band fiber optic coupler. Ib qhov rais muaj fiber ntau optic coupler yog nrog ib tus neeg ua hauj lwm wavelength. Dual qhov rais fiber ntau optic coupler yog nrog ob tus ua haujlwm wavelength. Rau hom tib lub fiber, yog qhov ua kom zoo dua rau 1310 nm thiab 1550 nm; Rau Multimode fiber, yog optimized rau 850 nm thiab 1310 nm.
