Kuti akwaniritse kufunikira kwa chidziwitso komwe anthu akufunika, kuchuluka kwa kutumiza mauthenga a ulusi wa kuwala kukukwera tsiku ndi tsiku. Netiweki yolumikizirana yamtsogolo idzapangidwa kukhala netiweki yolumikizirana ya ulusi wa kuwala yokhala ndi liwiro lalikulu kwambiri, mphamvu yayikulu kwambiri, mtunda wautali kwambiri, komanso magwiridwe antchito apamwamba kwambiri. Chotumizira ndi chofunikira kwambiri. Chotumizira chizindikiro cha kuwala cha liwiro lalikulu chimapangidwa makamaka ndi laser yomwe imapanga chonyamulira cha kuwala, chipangizo chopangira zizindikiro zamagetsi, ndi modulator yamagetsi ya liwiro lalikulu yomwe imasintha chonyamulira cha kuwala. Poyerekeza ndi mitundu ina ya ma modulators akunja, ma modulators a lithiamu niobate electro-optical ali ndi ubwino wa ma frequency operating frequency, kukhazikika bwino, chiŵerengero cha kuzimiririka kwakukulu, magwiridwe antchito okhazikika, liwiro lalikulu la modulation, chirp yaying'ono, kulumikizana kosavuta, ukadaulo wopanga wokhwima, ndi zina zotero. Imagwiritsidwa ntchito kwambiri mumakina otumizira mauthenga amagetsi a liwiro lalikulu, mphamvu yayikulu, komanso mtunda wautali.
Voliyumu ya theka-wave ndi gawo lofunikira kwambiri la electro-optic modulator. Imayimira kusintha kwa bias voltage yogwirizana ndi mphamvu ya kuwala kwa electro-optic modulator kuchokera pamlingo wocheperako kupita pamlingo wapamwamba. Imazindikira electro-optic modulator kwambiri. Momwe mungayezere molondola komanso mwachangu magetsi a theka-wave a electro-optic modulator ndikofunikira kwambiri pakukonza magwiridwe antchito a chipangizocho ndikuwonjezera magwiridwe antchito a chipangizocho. Voliyumu ya theka-wave ya electro-optic modulator imaphatikizapo DC (half-wave).
Voltage ndi Radiofrequency) theka la mafunde a voltage. Ntchito yosinthira ya electro-optic modulator ndi iyi:
Pakati pawo pali mphamvu yotulutsa kuwala ya electro-optic modulator;
Kodi mphamvu yowunikira yolowera ya modulator ndi iti?
Kodi kutayika kwa electro-optic modulator kumatanthauza chiyani?
Njira zomwe zilipo zoyezera mphamvu ya theka la mafunde zimaphatikizapo njira zopangira mphamvu zambiri komanso njira zowirikiza kawiri mafupipafupi, zomwe zimatha kuyeza mphamvu yamagetsi ya DC (DC) theka la mafunde ndi mphamvu ya wailesi (RF) theka la mafunde a modulator, motsatana.
Gome 1 Kuyerekeza njira ziwiri zoyesera magetsi a theka la mafunde
| Njira yokwera mtengo kwambiri | Njira yowirikiza kawiri | |
| Zipangizo za labu | Mphamvu ya laser Module ya mphamvu ikuyesedwa Mphamvu yamagetsi ya DC yosinthika ± 15V Mita yamagetsi yowunikira | Gwero la kuwala kwa laser Module ya mphamvu ikuyesedwa Mphamvu yamagetsi yosinthika ya DC Oscilloscope gwero la chizindikiro (DC Tsankho) |
| nthawi yoyesera | Mphindi 20() | Mphindi 5 |
| Ubwino woyesera | zosavuta kuchita | Mayeso olondola kwambiri Ikhoza kupeza magetsi a DC theka la mafunde ndi magetsi a RF theka la mafunde nthawi imodzi |
| Zoyipa zoyesera | Kwa nthawi yayitali komanso zinthu zina, mayesowo si olondola Mayeso olunjika a DC theka la mafunde a DC | Nthawi yayitali Zinthu monga kulakwitsa kwakukulu kwa chiweruzo cha mafunde, ndi zina zotero, mayesowo si olondola |
Imagwira ntchito motere:
(1) Njira yokwera mtengo kwambiri
Njira yamtengo wapatali imagwiritsidwa ntchito poyesa mphamvu ya DC theka la mafunde a electro-optic modulator. Choyamba, popanda chizindikiro cha modulation, mphamvu ya transfer function ya electro-optic modulator imapezeka poyesa mphamvu ya DC bias ndi kusintha kwa mphamvu ya kuwala kotuluka, ndipo kuchokera ku mphamvu ya transfer function Dziwani mfundo yamtengo wapatali kwambiri ndi mfundo yamtengo wapatali yochepa, ndikupeza mphamvu ya DC voltage Vmax ndi Vmin motsatana. Pomaliza, kusiyana pakati pa mphamvu ziwirizi ndi mphamvu ya theka la mafunde Vπ=Vmax-Vmin ya electro-optic modulator.
(2) Njira yowirikiza kawiri
Inali kugwiritsa ntchito njira yowirikiza kawiri pafupipafupi poyesa mphamvu ya RF theka-wave ya electro-optic modulator. Onjezani DC bias computer ndi AC modulation signal ku electro-optic modulator nthawi yomweyo kuti musinthe mphamvu ya DC pamene mphamvu ya kuwala kotuluka yasinthidwa kukhala mtengo wapamwamba kapena wocheperako. Nthawi yomweyo, ndipo zitha kuwonedwa pa dual-trace oscilloscope kuti chizindikiro chosinthidwa chotuluka chidzawoneka ngati kupotoza kawiri kawiri. Kusiyana kokha kwa mphamvu ya DC yogwirizana ndi kupotoza kawiri kawiri kawiri kwa frequency ndi mphamvu ya RF theka-wave ya electro-optic modulator.
Chidule: Njira yamtengo wapatali kwambiri komanso njira yowirikiza kawiri nthawi zonse imatha kuyeza mphamvu ya theka la mafunde a electro-optic modulator, koma poyerekeza, njira yamtengo wapatali imafuna nthawi yayitali yoyezera, ndipo nthawi yayitali yoyezera idzakhala chifukwa cha mphamvu yotulutsa kuwala ya laser imasinthasintha ndikuyambitsa zolakwika zoyezera. Njira yamtengo wapatali kwambiri imafunika kusanthula DC bias ndi mtengo waung'ono ndikulemba mphamvu yotulutsa kuwala ya modulator nthawi yomweyo kuti ipeze mphamvu yolondola kwambiri ya DC theka la mafunde.
Njira yowirikiza kawiri ndi njira yodziwira mphamvu ya theka la mafunde poona mphamvu ya mafunde yowirikiza kawiri. Pamene mphamvu ya bias yomwe imagwiritsidwa ntchito ifika pamtengo winawake, kusokonekera kwa kuchuluka kwa mafunde kumachitika, ndipo kusokonekera kwa mafunde sikuonekera kwambiri. Sikophweka kuwona ndi maso. Mwanjira imeneyi, mosakayikira kungayambitse zolakwika zazikulu, ndipo chomwe chimayesa ndi mphamvu ya RF theka la mafunde ya electro-optic modulator.