Kwisakhiwo senethiwekhi yefayibha ukuya ekhaya (FTTH), izihluzi ze-optical, njengezinto eziphambili zenethiwekhi ze-optical ezingasebenziyo (iiPON), zivumela ukwabelana ngabasebenzisi abaninzi ngefayibha enye ngokusasazwa kwamandla e-optical, nto leyo echaphazela ngokuthe ngqo ukusebenza kwenethiwekhi kunye namava omsebenzisi. Eli nqaku lihlalutya ngokucwangcisiweyo ubuchwepheshe obuphambili kucwangciso lwe-FTTH kwiimbono ezine: ukukhethwa kwetekhnoloji ye-optical splitter, uyilo lwesakhiwo senethiwekhi, ukulungiswa kwe-splitting ratio, kunye neendlela zexesha elizayo.
Ukukhethwa kwe-Optical Splitter: Uthelekiso lweTekhnoloji ye-PLC kunye ne-FBT
1. I-Planar Lightwave Circuit (PLC) Splitter:
•Inkxaso epheleleyo yebhendi (1260–1650 nm), ifanelekile kwiinkqubo zobude obude be-multi-wave;
•Ixhasa ukwahlulahlula okuphezulu (umz., 1×64), ukulahleka kokufakwa ≤17 dB;
•Uzinzo oluphezulu lobushushu (-40°C ukuya kuma-85°C ukuguquguquka <0.5 dB);
•Ukupakisha okuncinci, nangona iindleko zokuqala ziphezulu.
2. I-Fused Biconical Taper (FBT) Splitter:
•Ixhasa kuphela ubude be-wavelengths ezithile (umz., 1310/1490 nm);
•Ilinganiselwe ekuhlukaniseni okuphantsi (ngaphantsi kwe-1×8);
•Ukuguquguquka okukhulu kwelahleko kwiindawo ezinobushushu obuphezulu;
•Ixabiso eliphantsi, lifanelekile kwiimeko ezinqongopheleyo zebhajethi.
Icebo Lokukhetha:
Kwiindawo ezixineneyo zasezidolophini (izakhiwo zokuhlala eziphakamileyo, izithili zorhwebo), ii-PLC splitters kufuneka zibekwe phambili ukuze zihlangabezane neemfuno zokwahlulahlula ezikumgangatho ophezulu ngelixa zigcina ukuhambelana nokuphuculwa kwe-XGS-PON/50G PON.
Kwiimeko zasemaphandleni okanye ezinabantu abaninzi, ii-FBT splitters zinokukhethwa ukunciphisa iindleko zokuqala zokusasazwa. Uqikelelo lwemarike lubonisa ukuba isabelo semarike se-PLC siya kudlula i-80% (LightCounting 2024), ngokuyintloko ngenxa yeenzuzo zayo zokukhula kweteknoloji.
Uyilo loYilo lweNethiwekhi: Ukwahlulahlula okuphakathi ngokuchaseneyo nokuSasazwayo
1. I-Centralised Tier-1 Splitter
•I-Topology: I-OLT → 1×32/1×64 splitter (efakwe kwigumbi lezixhobo/i-FDH) → I-ONT.
•Iimeko ezifanelekileyo: Ii-CBD zasezidolophini, iindawo zokuhlala ezixineneyo.
•Iingenelo:
- Uphuculo lwe-30% ekusebenzeni kakuhle kwendawo yempazamo;
- Ukulahleka kwesigaba esinye se-17–21 dB, okuxhasa ukudluliselwa kwe-20 km;
- Ukwandiswa komthamo ngokukhawuleza ngokutshintshwa kwe-splitter (umz., 1×32 → 1×64).
2. I-Distributed Multi-Level Splitter
•I-Topology: I-OLT → 1×4 (Inqanaba 1) → 1×8 (Inqanaba 2) → I-ONT, inceda iintsapho ezingama-32.
•Iimeko ezifanelekileyo: Iindawo zasemaphandleni, iintaba, iindawo zokuhlala ezinezindlu ezinkulu.
•Iingenelo:
- Inciphisa iindleko ze-backbone fibre ngama-40%;
- Ixhasa ukuphindaphinda kwenethiwekhi yeringi (ukutshintsha ngokuzenzekelayo iimpazamo zesebe);
- Iyakwazi ukuziqhelanisa nomhlaba onzima.
Ukuphucula iSalathiso sokuHlukana: Ukulinganisela iiMfuno zoMgama woThumelo kunye neBandwidth
1. Ukuqinisekiswa koMsebenzisi kunye neBandwidth
Phantsi kwe-XGS-PON (10G ezantsi) enoqwalaselo lwe-1×64 splitter, i-peak bandwidth ngomsebenzisi ngamnye imalunga ne-156Mbps (izinga le-50% lemali ehambelanayo);
Iindawo ezinoxinano olukhulu zifuna iDynamic Bandwidth Allocation (DBA) okanye i-expanded C++ band ukuze kuphuculwe umthamo.
2. Ukubonelela ngoPhuculo lweXesha elizayo
Gcina umda wamandla okukhanya we-≥3dB ukuze ulungele ukuguga kwefayibha;
Khetha ii-PLC splitters ezinee-adjustable splitting ratios (umz., ezinokucwangciswa 1×32 ↔ 1×64) ukuze uphephe ulwakhiwo olungafunekiyo.
Iindlela Zekamva kunye Nokutsha Kwezobuchwepheshe
Itekhnoloji ye-PLC ikhokela ukwahlulahlula okukwinqanaba eliphezulu:Ukwanda kwe-10G PON kuye kwabangela ukuba ii-PLC splitters zisetyenziswe ngokubanzi, zixhasa ukuphuculwa okungenamthungo ukuya kwi-50G PON.
Ukwamkelwa koyilo lwezakhiwo oluhlanganisiweyo:Ukudibanisa ukwahlulwahlulwa kwenqanaba elinye kwiindawo zasezidolophini kunye nokwahlulwahlulwa kwenqanaba elininzi kwiindawo zasezidolophini kulungelelanisa ukusebenza kakuhle kweendleko kunye neendleko.
Itekhnoloji ye-ODN ekrelekrele:I-eODN ivumela uhlengahlengiso olukude lwemilinganiselo yokwahlulahlula kunye nokuqikelela iimpazamo, okuphucula ubukrelekrele bokusebenza.
Impumelelo yokuhlanganiswa kwe-silicon photonics:Iitships ze-PLC zeMonolithic ezingama-32-channel zinciphisa iindleko nge-50%, nto leyo evumela umlinganiselo wokwahlukana we-1×128 ophezulu kakhulu ukuqhubela phambili uphuhliso lwesixeko esikrelekrele esisebenza kuzo zonke iindawo.
Ngokusebenzisa ukukhethwa kwetekhnoloji eyenzelwe wena, ukusasazwa kwezakhiwo okuguquguqukayo, kunye nokwenza ngcono i-dynamic splitting ratio optimization, iinethiwekhi ze-FTTH zinokuxhasa ngokufanelekileyo ukuqaliswa kwe-gigabit broadband kunye neemfuno zophuhliso lwetekhnoloji zexesha elizayo leminyaka elishumi.
Ixesha leposi: Sep-04-2025