1. Ulusi wopangidwa ndi Erbium
Erbium ndi chinthu chosowa kwambiri cha dziko lapansi chokhala ndi nambala ya atomiki ya 68 ndi kulemera kwa atomiki ya 167.3. Mlingo wa mphamvu zamagetsi wa erbium ion wawonetsedwa pachithunzichi, ndipo kusintha kuchokera pamlingo wotsika wa mphamvu kupita kumlingo wapamwamba wa mphamvu kumafanana ndi njira yoyamwitsa kuwala. Kusintha kuchokera pamlingo wapamwamba wa mphamvu kupita kumlingo wotsika wa mphamvu kumafanana ndi njira yotulutsira kuwala.
2. Mfundo ya EDFA
EDFA imagwiritsa ntchito ulusi wopangidwa ndi erbium ion ngati njira yopezera mphamvu, yomwe imapanga kusintha kwa kuchuluka kwa anthu pansi pa kuwala kwa pampu. Imagwira ntchito yokulitsa mphamvu ya radiation pansi pa kuwala kwa chizindikiro.
Ma ioni a Erbium ali ndi mphamvu zitatu. Ali pamlingo wotsika kwambiri wa mphamvu, E1, pamene sakusangalatsidwa ndi kuwala kulikonse. Pamene ulusi ukusangalatsidwa mosalekeza ndi laser ya gwero la kuwala kwa pampu, tinthu tating'onoting'ono tomwe tili pansi timapeza mphamvu ndikusintha kupita kumlingo wapamwamba wa mphamvu. Monga kusintha kuchokera ku E1 kupita ku E3, chifukwa tinthu tating'onoting'ono tomwe tili pansi pamlingo wapamwamba wa mphamvu wa E3, timagwa mofulumira ku mkhalidwe wokhazikika wa E2 mu njira yosasinthika ya radiative. Pamlingo uwu wa mphamvu, tinthu tating'onoting'ono timakhala ndi moyo wautali. Chifukwa cha kusonkhezera kosalekeza kwa gwero la kuwala kwa pampu, chiwerengero cha tinthu tating'onoting'ono tomwe tili pansi pa mlingo wa mphamvu wa E2 chidzapitirira kuwonjezeka, ndipo chiwerengero cha tinthu tating'onoting'ono tomwe tili pansi pa mlingo wa mphamvu wa E1 chidzawonjezeka. Mwanjira imeneyi, kugawa kwa anthu mu ulusi wopangidwa ndi erbium, ndipo mikhalidwe yophunzirira kukulitsa kuwala ikupezeka.
Pamene mphamvu ya photon ya chizindikiro cholowera E=hf ili yofanana ndendende ndi kusiyana kwa mphamvu pakati pa E2 ndi E1, E2-E1=hf, tinthu tating'onoting'ono tomwe tili mu metastable state timasinthira ku ground state E1 mu mawonekedwe a stimulated radiation. Radiation ndi input Ma photon omwe ali mu chizindikirocho ndi ofanana ndi ma photon, motero amawonjezera kwambiri chiwerengero cha ma photon, zomwe zimapangitsa kuti input optical signal ikhale chizindikiro champhamvu chotulutsa mu ulusi wopangidwa ndi erbium, zomwe zimapangitsa kuti chizindikiro cholowera chikhale chowonjezera mwachindunji.
2. Chithunzi cha dongosolo ndi chiyambi cha chipangizo choyambira
2.1. Chithunzi cha dongosolo la L-band optical fiber amplifier ndi motere:
2.2. Chithunzi cha dongosolo la ASE light source la kutulutsa kwadzidzidzi kwa ulusi wopangidwa ndi erbium ndi motere:
Chiyambi cha chipangizo
1.ROF -EDFA -HP High Power Erbium Doped Fiber Amplifier
| Chizindikiro | Chigawo | Ochepera | Mtundu | Max | |
| Kuchuluka kwa mafunde ogwirira ntchito | nm | 1525 | 1565 | ||
| Mphamvu ya chizindikiro cholowera | dBm | -5 | 10 | ||
| Mphamvu yokwanira yotulutsa kuwala | dBm | 37 | |||
| Kukhazikika kwa mphamvu yotulutsa mphamvu ya kuwala | dB | ± 0.3 | |||
| Chizindikiro cha phokoso @ input 0dBm | dB | 5.5 | 6.0 | ||
| Lowetsani kudzipatula kwa kuwala | dB | 30 | |||
| Kutulutsa kuwala kodzipatula | dB | 30 | |||
| Kutayika kobwezera kolowera | dB | 40 | |||
| Kutayika kobwerera kwa zotsatira | dB | 40 | |||
| Phindu lodalira kugawanika | dB | 0.3 | 0.5 | ||
| Kufalikira kwa njira yogawanitsira | ps | 0.3 | |||
| Kutulutsa kwa pompu yolowera | dBm | -30 | |||
| Kutulutsa kwa pampu yotulutsa | dBm | -30 | |||
| Mphamvu yogwiritsira ntchito | V(AC) | 80 | 240 | ||
| Mtundu wa ulusi | SMF-28 | ||||
| mawonekedwe otulutsa | FC/APC | ||||
| Chiyankhulo cholumikizirana | RS232 | ||||
| Kukula kwa phukusi | Gawo | mm | 483×385×88(choyikapo cha 2U) | ||
| Kompyuta | mm | 150×125×35 | |||
2. ROF -EDFA -B chowonjezera mphamvu ya ulusi chopangidwa ndi erbium
| Chizindikiro | Chigawo | Ochepera | Mtundu | Max | ||
| Kuchuluka kwa mafunde ogwirira ntchito | nm | 1525 | 1565 | |||
| Mphamvu ya chizindikiro chotulutsa | dBm | -10 | ||||
| Kupeza chizindikiro pang'ono | dB | 30 | 35 | |||
| Kuchuluka kwa zotulutsa zamagetsi zodzaza ndi kuwala * | dBm | 17/20/23 | ||||
| Phokoso ** | dB | 5.0 | 5.5 | |||
| Kuika payokha | dB | 30 | ||||
| Kudzipatula kotulutsa | dB | 30 | ||||
| Kugawanika kwa ndale phindu lodziyimira pawokha | dB | 0.3 | 0.5 | |||
| Kufalikira kwa njira yogawanitsira | ps | 0.3 | ||||
| Kutulutsa kwa pompu yolowera | dBm | -30 | ||||
| Kutulutsa kwa pampu yotulutsa | dBm | -40 | ||||
| Mphamvu yogwiritsira ntchito | gawo | V | 4.75 | 5 | 5.25 | |
| kompyuta | V(AC) | 80 | 240 | |||
| Ulusi wowala | SMF-28 | |||||
| mawonekedwe otulutsa | FC/APC | |||||
| Miyeso | gawo | mm | 90×70×18 | |||
| kompyuta | mm | 320×220×90 | ||||
3. ROF -EDFA -P chitsanzo cha Erbium chopangidwa ndi ulusi wopangidwa ndi doped
| Chizindikiro | Chigawo | Ochepera | Mtundu | Max | |
| Kuchuluka kwa mafunde ogwirira ntchito | nm | 1525 | 1565 | ||
| Mphamvu ya chizindikiro cholowera | dBm | -45 | |||
| Kupeza chizindikiro pang'ono | dB | 30 | 35 | ||
| Kuchuluka kwa mphamvu yotulutsa kuwala * | dBm | 0 | |||
| Chizindikiro cha phokoso ** | dB | 5.0 | 5.5 | ||
| Lowetsani kudzipatula kwa kuwala | dB | 30 | |||
| Kutulutsa kuwala kodzipatula | dB | 30 | |||
| Phindu lodalira kugawanika | dB | 0.3 | 0.5 | ||
| Kufalikira kwa njira yogawanitsira | ps | 0.3 | |||
| Kutulutsa kwa pompu yolowera | dBm | -30 | |||
| Kutulutsa kwa pampu yotulutsa | dBm | -40 | |||
| Voltage Yogwira Ntchito | Gawo | V | 4.75 | 5 | 5.25 |
| Kompyuta | V(AC) | 80 | 240 | ||
| Mtundu wa ulusi | SMF-28 | ||||
| Chiyankhulo Chotulutsa | FC/APC | ||||
| Kukula kwa phukusi | Gawo | mm | 90*70*18 | ||
| Kompyuta | mm | 320*220*90 | |||