Pofuna kukwaniritsa zomwe anthu akuchulukirachulukira zachidziwitso, kuchuluka kwa njira zoyankhulirana za optical fiber zikuwonjezeka tsiku ndi tsiku. Ma network olumikizirana amtsogolo adzapita ku netiweki yolumikizana ndi fiber optical yokhala ndi liwiro lalikulu kwambiri, mphamvu yayikulu kwambiri, mtunda wautali kwambiri, komanso magwiridwe antchito apamwamba kwambiri. Transmitter ndiyofunikira. Ma transmitter othamanga kwambiri amapangidwa makamaka ndi laser yomwe imapanga chonyamulira chowunikira, chipangizo chopangira ma siginecha amagetsi, komanso chowongolera chothamanga kwambiri cha electro-optical chomwe chimasintha chonyamulira cha kuwala. Poyerekeza ndi mitundu ina ya ma modulators akunja, ma lithiamu niobate electro-optical modulators ali ndi ubwino wa maulendo ambiri ogwiritsira ntchito, kukhazikika kwabwino, chiŵerengero cha kuzimiririka kwakukulu, kugwira ntchito kosasunthika, kusinthasintha kwakukulu, kulira kwazing'ono, kugwirizana kosavuta, luso lopanga kupanga, etc. amagwiritsidwa ntchito kwambiri pamakina othamanga kwambiri, othamanga kwambiri, komanso akutali.
Theka-wave voltage ndi gawo lofunikira kwambiri lamagetsi a electro-optic modulator. Zimayimira kusintha kwa voteji ya tsankho lolingana ndi mphamvu ya kuwala kwa electro-optic modulator kuchokera pamunsi mpaka pazipita. Imatsimikizira ma electro-optic modulator pamlingo waukulu. Momwe mungayezere molondola komanso mwachangu mphamvu ya theka la mafunde a electro-optic modulator ndiyofunikira kwambiri pakuwongolera magwiridwe antchito a chipangizocho ndikuwongolera bwino kwa chipangizocho. Theka-wave voliyumu ya electro-optic modulator imaphatikizapo DC (theka-wave
voliyumu ndi ma radiofrequency) voteji ya theka la wave. Ntchito yosinthira ya electro-optic modulator ndi motere:
Zina mwa izo ndi linanena bungwe kuwala mphamvu ya electro-optic modulator;
Ndi mphamvu yamagetsi yamagetsi yolowera;
Ndi kutayika kwa kuyika kwa electro-optic modulator;
Njira zomwe zilipo zoyezera voteji ya theka la mafunde akuphatikiza njira zopangira mtengo kwambiri komanso njira zowirikiza kawiri, zomwe zimatha kuyeza voteji yachindunji (DC) theka-wave voltage ndi ma radio frequency (RF) theka-wave voteji ya modulator, motsatana.
Table 1 Kuyerekeza kwa njira ziwiri zoyesera magetsi a theka-wave
| Njira yamtengo wapatali | Njira yowirikiza kawiri | |
| Zida za laboratory | Mphamvu ya laser Intensity module poyesedwa Magetsi osinthika a DC ± 15V Optical mphamvu mita | Gwero la kuwala kwa laser Intensity module poyesedwa Magetsi osinthika a DC Oscilloscope gwero la chizindikiro (Kukondera kwa DC) |
| nthawi yoyesera | 20min () | 5 min |
| Ubwino woyeserera | zosavuta kukwaniritsa | Mayeso olondola Atha kupeza DC theka-wave voteji ndi RF theka-wave voteji nthawi yomweyo |
| Zoyipa zamayesero | Nthawi yayitali komanso zinthu zina, mayesowo siwolondola Direct Passenger test DC theka-wave voteji | Nthawi yayitali Zinthu monga kulakwitsa kwakukulu kosokonekera kwa ma waveform, ndi zina zambiri, kuyesako sikulondola |
Zimagwira ntchito motere:
(1) Njira yamtengo wapatali kwambiri
Njira yamtengo wapatali imagwiritsidwa ntchito kuyeza voteji ya DC half-wave ya electro-optic modulator. Choyamba, popanda chizindikiro chosinthira, mayendedwe osinthira a electro-optic modulator amapezedwa poyesa voteji ya DC bias ndi kusintha kwamphamvu kwa kuwala, ndipo kuchokera pamapindi a ntchito yosinthira. pezani ma voliyumu ofanana a DC Vmax ndi Vmin motsatana. Pomaliza, kusiyana pakati pa ma voliyumu awiriwa ndi theka-wave voltage Vπ=Vmax-Vmin ya electro-optic modulator.
(2) Njira yowirikiza kawiri
Anali kugwiritsa ntchito njira yowirikiza kawiri kuyeza voteji ya RF half-wave ya electro-optic modulator. Onjezani kompyuta yokondera ya DC ndi siginecha ya AC yosinthira ma electro-optic modulator nthawi yomweyo kuti musinthe voteji ya DC pomwe mphamvu yotulutsa kuwala isinthidwa kukhala pamlingo wapamwamba kapena wocheperako. Pa nthawi yomweyo, ndipo zikhoza kuwonedwa pa wapawiri-kufufuza oscilloscope kuti linanena bungwe modulated chizindikiro adzaoneka pafupipafupi kuwirikiza kawiri kupotoza. Kusiyana kokha kwamagetsi a DC omwe amafanana ndi kupotoza kuwiri koyandikana pafupipafupi ndi RF theka-wave voltage ya electro-optic modulator.
Mwachidule: Njira zonse zamtengo wapatali komanso njira yowirikiza kawiri imatha kuyeza voteji ya theka la mafunde a electro-optic modulator, koma kuyerekeza, njira yamphamvu yamtengo wapatali imafuna nthawi yayitali yoyezera, ndipo nthawi yayitali yoyezera idzakhala chifukwa cha Mphamvu ya kuwala kwa laser imasinthasintha ndipo imayambitsa zolakwika za muyeso. Njira yamtengo wapatali imayenera kusanthula kukondera kwa DC ndi mtengo wocheperako ndikujambulitsa mphamvu yamagetsi yotulutsa yotulutsa nthawi yomweyo kuti mupeze zolondola kwambiri za DC theka-wave voliyumu.
Njira yowirikiza kawiri ndi njira yodziwira voteji ya theka-wave powona ma frequency owirikiza kawiri ma waveform. Mphamvu yamagetsi yomwe imagwiritsidwa ntchito ikafika pamtengo wina, kupotoza kochulukira pafupipafupi kumachitika, ndipo kupotoza kwa ma waveform sikukuwonekera kwambiri. Sikophweka kuyang'ana ndi maso. Mwanjira imeneyi, zidzayambitsa zolakwika zazikulu, ndipo zomwe zimayesa ndi RF theka-wave voltage ya electro-optic modulator.