Malangizo apadera a erbium-doped fiber amplifier (EDFA Optical Amplifier)

Malangizo apadera a erbium-doped fiber amplifier (Chokulitsa cha EDFA Optical)
Mwagulachokulitsa cha ulusi chopangidwa ndi erbium(EDFA Optical Amplifier) ​​yokhala ndi specification ya 30dB gain ndi mphamvu yotulutsa ya saturation ya +20dBm.
Lumikizani kuwala kolowera kwa 0dBm ndikuwerenga kutulutsa kwa +27dBm. Mutha kuwerengera kuti 30-3=27, ndipo kukwera si vuto.
Koma bwanji ngati muyika -20dBm? Kuchuluka kwa 30dB kumatanthauza kuti kutulutsa kuyenera kukhala +10dBm, koma muyeso weniweni ndi +7dBm yokha - 3dB yonse yocheperako. Iyi si vuto la khalidwe. 30dB ndi kuchuluka kwa chizindikiro chochepa, pomwe phokoso la ASE ndi chiwerengero cha phokoso zimadya kuchuluka kwanu. Ndipotu, kuchuluka komwe kumayesedwa nthawi zambiri kumakhala pansi pa kuchuluka kwa nomine, zomwe zimafotokoza kuti izi si vuto la khalidwe la zida, koma zimatsimikiziridwa ndi momwe amplifier imagwirira ntchito.

Kupeza pang'ono kwa chizindikiro ≠ phindu lenileni:

1. Kutsutsana kwakukulu: Kuchuluka kwa phindu komwe kwawonetsedwa pa pepala lofotokozera (monga 30dB) ndi kuchuluka kwa chizindikiro, komwe ndi mtengo woyenera woyezera pamene mphamvu ya chizindikiro cholowera ili yochepa kwambiri (monga -20~-30dBm) komanso pa mphamvu ya pampu yoyesedwa. Izi sizikufanana ndi kuchuluka kwenikweni pamene mphamvu ya chizindikiro cholowera ili yokwera kwambiri pakugwiritsa ntchito.
2. Chifukwa chachikulu cha kuchepa kwa phindu:
2.1 Kuchuluka kwa mphamvu ya chizindikiro cholowera: Pamene mphamvu ya chizindikiro cholowera ikukwera, EDFAChokulitsa Chowunikiraimalowa m'dera la saturation, zomwe zimapangitsa kuti phindu lichepe kuchokera pamtengo wake wapamwamba kwambiri.
2.2 Kusintha kwa phokoso la ASE: Phokoso la Amplified spontaneous emission (ASE) limapikisana ndi kuwala kwa chizindikiro ndipo limagwiritsa ntchito mphamvu zochepa za pampu. Phokoso la ASE likalimba, phindu lothandiza lomwe limagwiritsidwa ntchito kukulitsa kuwala kwa chizindikiro limachepa. Ichi ndi chimodzi mwa zifukwa zazikulu zomwe phindu loyezedwa limachepera kuposa mtengo wamba.
2.3 Ubale wa kuchuluka: Mphamvu ya chizindikiro cholowera ikakwera, kupanikizika kwa phindu lenileni (G_actual) kumakulirakulira poyerekeza ndi phindu laling'ono la chizindikiro (G_small). Kuchuluka kwa kupsinjika kumachokera makamaka ku kupsinjika kwa saturation (Δ G_sat) ndi phindu kuchokera ku ASE noise consumption (Δ G_ASE). Mwachitsanzo, mphamvu yolowera ikakhala 0dBm, nthawi zambiri phindu loyezedwa limakhala lochepera 3dB kuposa mtengo wamba.
3. Malangizo a ntchito za uinjiniya:
3.1 Bajeti ya ulalo: Kupeza chizindikiro pang'ono sikuyenera kugwiritsidwa ntchito mwachindunji powerengera, koma njira yeniyeni ya bajeti ya ulalo iyenera kutsatiridwa:
P_out ≈ P_in+G_small-NF-3dB (malire achitetezo)
Pakati pawo, NF ndi chiwerengero cha phokoso (mtengo wamba 4-6dB).
3.2 Kuwerengera mobwerezabwereza: Ngati mphamvu yoyezera yotulutsa sikugwirizana ndi bajeti ya fomula, fomulayo ingagwiritsidwe ntchito kuwerengera chiwerengero chenicheni cha phokoso la dongosolo (NF) mobwerezabwereza, motero kulola kapangidwe ndi kuwerengera kolondola kwambiri kwa ulalo.

Kutsiliza: Mukayesa ndikugwiritsa ntchitoEDFAOptical Amplifier, mainjiniya ayenera kusamala ndi mphamvu yawo ya chizindikiro cholowera ndikumvetsetsa mawonekedwe a kupsinjika kwa gain pansi pa mikhalidwe yayikulu ya chizindikiro. Popanga ulalo, bajeti iyenera kutengera mphamvu yeniyeni yolowera ndi mainjiniya omwe amaphatikizapo phokoso ndi malire achitetezo, m'malo mongodalira mtengo wamba wa gain yaying'ono ya chizindikiro patsamba lofotokozera. Mukalandira EDFA Optical Amplifier, choyamba funsani kuti mphamvu yolowera ndi chiyani, kenako gwiritsani ntchito fomula ya bajeti yolumikizira kuti muwerengere zomwe mukuyembekezera. Musagwiritse ntchito gain yaying'ono ya chizindikiro pokonza bajeti yonse ya mphamvu.