Taw qhia
Raws li fiber ntau-rau--tsev (FTTH) networks dhau los ua tus qauv thoob ntiaj teb rau siab- nrawm nrawm, nkag siab txog cov ntsiab lus tseem ceeb uas ua kom lawv cov kev ua tau zoo yog qhov tseem ceeb rau cov neeg ua haujlwm. Ntawm cov no, covFTTH optical receiverua lub luag haujlwm tseem ceeb hauv kev xa cov yeeb yaj kiab, suab, thiab cov ntaub ntawv tsis sib haum mus rau qhov kawg - cov neeg siv. Cov ntawv blog no delves rau hauv lub hauv paus ntawm FTTH optical receivers, lawv cov kev specifications, thiab vim li cas lawv tseem ceeb rau network tswv.
1. Dab tsi yog FTTH Optical Receiver?
Ib qho FTTH optical receiver yog ib lub cuab yeej ntsia ntawm tus neeg siv qhov chaw (xws li, tsev lossis chaw ua haujlwm) los hloov cov teeb liab kho qhov muag kis ntawm fiber ntau cables rau hauv cov teeb liab hluav taws xob rau kev faib tawm los ntawm coaxial cables lossis Ethernet tes hauj lwm. Nws ua haujlwm ua tus choj nruab nrab ntawm lub network passive optical network (PON) thiab cov neeg siv khoom-fab cov khoom siv (xws li, teeb- cov thawv sab saum toj, routers, lossis TVs).
Lub luag haujlwm tseem ceeb:
Photoelectric Hloov: Txhais cov teeb liab teeb liab (feem ntau ntawm 1310nm / 1550nm wavelengths) rau hauv RF hluav taws xob teeb liab.
Teeb liab Amplification: Boosts teeb liab lub zog los xyuas kom meej qhov tso zis ntau ntau (piv txwv li, 72–95 dBμV).
Txo suab nrov: Txo cov teeb liab degradation siv tsawg- suab nrov amplifiers (GaAs thev naus laus zis feem ntau).
2. Cov Cheebtsam tseem ceeb thiab lawv ua haujlwm li cas
Niaj hnub no FTTH optical receivers integrate advanced Cheebtsam los txhim khu kev ntseeg thiab kev ua tau zoo:
Photodiode: Feem ntau tus PIN photodiode, uas hloov lub teeb rau hluav taws xob teeb liab nrog kev ua haujlwm siab quantum (70-90%) thiab tsis tshua muaj qhov tsaus ntuj tam sim no.
Impedance Matching Network: Ua kom cov teeb liab hloov tau zoo ntawm photodiode thiab amplifier.
Tsawg-Noise Amplifier (LNA): Qhov tseem ceeb rau kev tswj cov teeb liab kev ncaj ncees; feem ntau tsim siv GaAs chips rau suab nrov tsawg.
Microprocessor-Based AGC: Tsis siv neeg kho qhov nce raws li cov khoom siv hluav taws xob (piv txwv li, -18dBm rau 0dBm) kom ruaj khov tso zis.
WDM lim: Pab kom triple-kev pabcuam ua si (video, suab, ntaub ntawv) los ntawm kev sib cais wavelengths (xws li 1310nm/1490nm/1550nm).
Txoj Cai Ua Haujlwm:
Optical signals nkag mus rau lub receiver ntawm SC / APC lossis FC / APC connector. Lub photodiode hloov lawv mus rau cov teeb liab hluav taws xob, uas tom qab ntawd nthuav dav, lim, thiab tso zis los ntawm RF chaw nres nkoj (piv txwv li, F-hom connectors).
3. Technical Specifications Cov neeg ua haujlwm yuav tsum paub
Rau cov neeg teb xov tooj, xaiv qhov zoo optical receiver yuav tsum tau saib xyuas rau cov kev txwv no:
| Parameter | Tus nqi | Qhov tseem ceeb |
| Wavelength Range | 1100-1600 nm | Compatibility nrog PON systems (GPON / EPON). |
| Input Power Range | -18 dBm rau 0 dBm | Txiav txim siab rhiab heev thiab dynamic ntau yam. |
| Qib tso zis | 72-95 dBV | Ua kom muaj lub zog txaus txaus rau qhov kawg - cov neeg siv khoom siv. |
| Noise Figure (NF) | Tsawg dua lossis sib npaug li 2.5 dB | Tseem ceeb rau kev tswj cov teeb liab zoo (CNR Ntau dua lossis sib npaug rau 52 dB). |
| MER | Ntau dua lossis sib npaug li 32 dB | Qhov tseem ceeb rau cov teeb liab kev ncaj ncees (piv txwv li, rau IPTV). |
| Kev siv fais fab | <1–3 W | Liab cov nqi ua haujlwm thiab kev tswj xyuas thermal. |
4. Yog vim li casFTTH Optical ReceiversTeeb meem rau cov neeg ua haujlwm
Nqi Efficiency: Cov neeg txais khoom niaj hnub ua kom yooj yim kawg - mais kev sib txuas, hloov cov khoom siv tooj liab kim.
Yav tom ntej -Kev pov thawj: Txhawb siab - bandwidth daim ntawv thov (piv txwv li, 4K / 8K video, IoT) thiab cov ntaub ntawv tus nqi txog 10 Gbps.
Kev paub siv: Nta xws li tsis siv neeg nce tswj (AGC) kom ruaj khov kev ua tau zoo txawm hais tias lub zog hloov pauv hloov pauv.
Triple-Play Kev koom ua ke: Nrog WDM thev naus laus zis, ib tus neeg txais khoom tuaj yeem tuav cov yees duab, suab, thiab cov ntaub ntawv.
5. Kev txiav txim siab xa mus
Environmental Resilience: Xaiv cov txais nrog qhov kub thiab txias (-40℃txog 85 degree) rau kev siv sab nraum zoov.
AGC Flexibility: Xaiv rau cov neeg txais nrog cov programmable AGC ntau yam (piv txwv li, -12dBm rau -2dBm) kom hloov mus rau qhov sib txawv ntawm lub network.
Kev ruaj ntseg thiab kev ntseeg siab: Ua ntej ua qauv nrog kev tiv thaiv surge (piv txwv li, kev ua raws li IEC 1000-4-5) los tiv thaiv kev puas tsuaj los ntawm qhov hluav taws xob spikes.
6. Yav tom ntej Trends
Miniaturization: Compact designs (piv txwv li, 75mm × 66mm × 28mm) rau qhov chaw -constrained installations.
Zog -Txuag nta: Infrared sensors rau fais fab tuag txais tsis siv.
Txhim kho rhiab heev: Tshawb nrhiav hauv cov txheej txheem txais tos sib koom ua ke kom ua tau zoo dua.
FTTH optical receiversyog qhov tseem ceeb rau kev xa cov kev pabcuam siab - zoo broadband. Los ntawm kev nkag siab txog lawv cov kev txawj ntse thiab kev muaj peev xwm hloov pauv, cov tswv lag luam hauv network tuaj yeem ua kom zoo dua kev nqis peev, txhim kho cov neeg siv kev txaus siab, thiab tsim kom muaj kev ruaj ntseg yav tom ntej - npaj network.
