Mirayiridzo yakakosha ye erbium-doped fiber amplifier (EDFA Optical Amplifier)

Mirayiridzo yakakosha ye erbium-doped fiber amplifier (EDFA Optical amplifier)
Watengaamplifier yefayibha ine erbium-doped(EDFA Optical Amplifier) ​​ine hunyanzvi hwe30dB gain uye simba rekubuda kwe saturation re+20dBm.
Batanidza chiedza che 0dBm woverenga kubuda kwe +27dBm. Unogona kuverenga kuti 30-3=27, uye kuwedzera hakusi dambudziko.
Asi ko kana ukaisa -20dBm? Kuwana kwe30dB zvinoreva kuti kubuda kunofanira kunge kuri +10dBm, asi chiyero chaicho chiri +7dBm chete - 3dB yakazara shoma. Iyi haisi nyaya yemhando. 30dB inyaya diki yekuwedzera kwechiratidzo, nepo ruzha rweASE nenhamba yeruzha zvichidya kuwana kwako. Kutaura zvazviri, kuwana kwakayerwa kunowanzo wira pasi pekuwana kwechinhu, izvo zvinojekesa kuti chiitiko ichi hachisi dambudziko remhando yemuchina, asi chinotsanangurwa nekushanda kweamplifier.

Kuwana chiratidzo kudiki ≠ kuwana chaiko:

1. Kupesana kukuru: Kuwana kunoratidzwa papepa rezvinotsanangurwa (semuenzaniso 30dB) kuwana chiratidzo kudiki, inova ndiyo chiyero chakakodzera kana simba rechiratidzo chekupinda rakaderera zvikuru (semuenzaniso -20~-30dBm) uye pasimba repombi rakatarwa. Izvi hazvienzane nekuwana chaiko kana simba rechiratidzo chekupinda rakawanda mukushanda kwaro.
2. Chikonzero chikuru chekuderera kwekuwedzera kwemafuta:
2.1 Kuwedzera kuwanda: Sezvo simba rechiratidzo chekupinda richiwedzera, EDFAChinopa simba reOpticalinopinda munzvimbo yekuzara kwemafuta, zvichiita kuti kuwedzera kwemafuta kuderera kubva pahuwandu hwayo hwepamusoro.
2.2 Kuchinja ruzha rweASE: Ruzha rweAmplified spontaneous emission (ASE) runokwikwidzana nechiedza chechiratidzo uye runopedza simba shoma repombi. Ruzha rweASE rwakasimba, ndiko kudzikira kwegain inoshanda inoshandiswa kuwedzera chiedza chechiratidzo. Ichi ndicho chimwe chezvikonzero zvikuru nei gain yakayerwa yakaderera pane kukosha kwemazita.
2.3 Hukama hwehuwandu: Kana simba rechiratidzo chekupinda rakwira, kudzvanywa kwegain chaiyo (G_actual) kukuru zvichienzaniswa negain diki yechiratidzo (G_small). Huwandu hwekudzvanywa hunonyanya kubva mukudzvanywa kwesaturation (Δ G_sat) uye kudzvanywa kubva kukushandiswa kwenoise yeASE (Δ G_ASE). Semuenzaniso, kana simba rekupinda riri 0dBm, zvakajairika kuti gain yakayerwa ive yakaderera kupfuura 3dB pane kukosha kwemazita.
3. Mazano ekushanda kweinjiniya:
3.1 Bhajeti rekubatanidza: Kuwana chiratidzo kudiki hakufanirwe kushandiswa zvakananga pakuverenga, asi fomura yebhajeti rekubatanidza rine chokwadi inofanira kushandiswa:
P_out ≈ P_in+G_small-NF-3dB (muganho wekuchengetedza)
Pakati pavo, NF ndiyo nhamba yeruzha (yakajairika kukosha 4-6dB).
3.2 Kugadzirisa Kudzokera Kumashure: Kana simba rekubuda rakayerwa risingaenderane nebhajeti refomura, fomura inogona kushandiswa kuverenga nhamba chaiyo yeruzha rwesystem (NF) nekudzokera kumashure, zvichiita kuti dhizaini uye kuyera link zvive zvakarurama.

Mhedziso: Pakuongorora nekushandisaEDFAOptical Amplifier, mainjiniya vanofanirwa kutarisisa simba ravo rekuisa chiratidzo uye kunzwisisa hunhu hwekuwedzera simba pasi pemamiriro echiratidzo chakakwirira. Pakugadzira chinongedzo, bhajeti rinofanira kunge rakavakirwa pasimba rekuisa uye mafomura einjiniya anosanganisira noise factor uye safety margin, pane kungovimba nemutengo wechiratidzo chidiki papepa rezvinotsanangurwa. Mushure mekugamuchira EDFA Optical Amplifier, tanga wabvunza kuti simba rekuisa chii, wobva washandisa fomura yebhajeti rekubatanidza kuverenga zvinotarisirwa. Usashandise small signal gain pakugadzirisa bhajeti resimba rakazara.