Ntuziaka pụrụ iche maka amplifier eriri erbium-doped (EDFA Optical Amplifier)

Ntuziaka pụrụ iche maka amplifier eriri erbium-doped (Ngwa ngwa anya EDFA)
Ị zụtala otuihe na-eme ka eriri erbium dị n'ime ya(EDFA Optical Amplifier) ​​nke nwere nkọwapụta nke uru 30dB na ike mmepụta saturation nke +20dBm.
Jikọọ ọkụ ntinye 0dBm wee gụọ mmepụta nke +27dBm. Ị nwere ike ịgbakọ nke ahụ 30-3 = 27, uru ahụ abụghịkwa nsogbu.
Mana gịnị ma ọ bụrụ na ị tinye -20dBm? Uru nke 30dB pụtara na mmepụta kwesịrị ịbụ +10dBm, mana nha ahụ bụ naanị +7dBm - obere 3dB zuru oke. Nke a abụghị nsogbu mma. 30dB bụ obere uru mgbaàmà, ebe mkpọtụ na mkpọtụ ASE na-eri uru gị. N'ezie, uru a tụrụ na-adakarị n'okpuru uru aha, nke na-eme ka o doo anya na ihe a abụghị nsogbu àgwà nke akụrụngwa, kama ọ bụ usoro ọrụ nke amplifier na-ekpebi ya.

Mmụba obere ihe mgbaàmà ≠ uru n'ezie:

1. Isi ihe na-emegiderịta onwe ya: Uru egosiri na mpempe akwụkwọ nkọwapụta (dịka ọmụmaatụ 30dB) bụ obere uru mgbaàmà, nke bụ uru nha zuru oke mgbe ike mgbaama ntinye dị obere (dịka ọmụmaatụ -20~-30dBm) na na ike mgbapụta enyere. Nke a erughị uru ahụ n'ezie mgbe ike mgbaama ntinye dị elu na ngwa bara uru.
2. Isi ihe kpatara mbelata nke uru:
2.1 Uru nke afọ ojuju: Ka ike mgbaama ntinye na-abawanye, EDFANgwa ngwa anyana-abanye na mpaghara saturation, na-eme ka uru ahụ belata site na uru kachasị ya.
2.2 Mgbasa nke mkpọtụ ASE: Mkpọtụ emission spontaneous (ASE) nke a na-akpọ Amplified spontent emission (ASE) na-asọmpi na ọkụ mgbaàmà ma na-eri obere ike mgbapụta. Ka mkpọtụ ASE siri ike, otú ahụ ka uru dị irè e ji eme ka ìhè mgbaàmà dịkwuo elu si dị ala. Nke a bụ otu n'ime ihe ndị bụ isi mere uru a tụrụ ji dị ala karịa uru aha.
2.3 Mmekọrịta ọnụọgụgụ: Ka ike mgbaama ntinye dị elu, otú ahụ ka mkpakọ nke uru n'ezie (G_actual) na-abawanye ma e jiri ya tụnyere obere uru mgbaama (G_small). Ọnụọgụ mkpakọ ahụ na-esitekarị na mkpakọ saturation (Δ G_sat) na uru sitere na oriri mkpọtụ ASE (Δ G_ASE). Dịka ọmụmaatụ, mgbe ike ntinye bụ 0dBm, ọ bụ ihe a na-ahụkarị na uru a tụrụ ga-adị ala karịa 3dB karịa uru aha.
3. Aro omume injinia:
3.1 Mmefu ego njikọ: Ekwesighi iji obere uru mgbaàmà kpọmkwem maka mgbakọ, mana ekwesịrị iji usoro mmefu ego njikọ dị irè karị:
P_out ≈ P_in+G_small-NF-3dB (oke nchekwa)
N'ime ha, NF bụ ụda mkpọtụ (uru nkịtị 4-6dB).
3.2 Nhazigharị Ntugharị: Ọ bụrụ na ike mmepụta a tụrụ adabaghị na mmefu ego usoro, enwere ike iji usoro ahụ gbakọọ ọnụọgụ mkpọtụ sistemụ (NF) n'ezie n'azụ, si otú a na-eme ka nhazi njikọ na nhazi ya dịkwuo mma.

Mmechi: Mgbe a na-enyocha ma na-eji yaEDFANgwa ...