Ginaaw xaralay jokkoo optik dafay gëna dem ba yegg ci gaawaay yu gëna rëy, dëgëraay bu gëna rëy, ak di wàññi energie bi ñuy jëfandikoo, stabilite bi ak kàttanu di tere interference yi ci siñaali montor yi dañu nekk lu am solo ci kàttanu sistem bi yépp. Osilatëru kristal yu wuute yi, ak seen jumtukaayu joxe siñaal, ñu ngi gëna jëm ca kanam nekk balluwaayi montor ci module optik yu melni transceiver optik 400G/800G.
I. Li ñuy laaj ci montor ak jafe-jafe yi ci modulu jokkoo optik
Ci sistemu jokkoo optik yi, module optik yi ñoo yor soppi siñaal elektronik yi ci siñaal optik. Koposaŋ yu am solo yu melni dawalkat laser, TIAs, ak sircuit CDR dañuy laaj ay sàrt yu tar ci siñaali montor yi:
Faas bu néew bruit ak jitter: Transmisioŋ siñaal bu gaaw (lu melni, 56Gbps PAM4, 112Gbps NRZ) dafay laaj jitter nekk ci suufu 100 fs (niveau femtoseconde) ngir moytu yokkute ci njuumte bit (BER).
Resistance EMI: Ci biir environmaa electromagnetik bu bari ay module yu am dëgëraay bu rëy, montor yu am benn catu - dañuy gaawa crosstalk.
Dañu wara tëye tàngoor wi: Module yi dañu wara am fréquence bu dëgër (±2.5 ppm wala gëna) ci kaw tàngoor wu bari (-40 degre ba 85 degre).
II. Njariñu xarala yu osilatëri kristal yu wuute
Buñu ko méngale ak osilatër yu am benn -, osilatëri kristal yu wuute yi dañuy génne ñaari siñaal yu wuute yuñ soppi (lu melni, LVDS, LVPECL), loolu dafay gëna baaxal sistem bi:
Màndarga Anti-
Bañ bruit bu bari ci anam -: Reseptër yu wuute yi dañuy dindi bruit bu bari ci anam - (lu melni coppite doole ak EMI) jaaraleko ci dindi.
Radiasioŋ EMI bu wàññeeku: Yooni siñaal yu symetrik yi dañuy fomm champ electromagnetik yi, wàññi radiasioŋ ci lu tollu ci 20 dB.
Integrite siñaal biñ gëna defar
Taux slew bu yéeg: Transition yi gëna gaaw ci boor yi dañuy wàññi waxtu yéeg ak wàcci, te loolu lu am solo la ci interface 56Gbps + SerDes.
Impedans buy méngoo: Tombi wuute yi dañuy méngoo ak impedans 100Ω, di yombal jëmmal PCB.
Kuuraŋ bu néew
LVDS -oscillateurs différentiels yi dañuy lekk 60–70% doole bu néew ci yi am benn -, ñu méngoo ak doole yu néew - yu melni QSFP-DD.
III. Aplikaasioŋ yiñ gëna xam ci module optik yi
-Gaawaay bu kawe SerDes Source
Jëfandikoo gi: Dafay joxe montor yuñ mëna jëfandikoo ngir modulatëri PAM4 ak sircuit CDR.
Ci misaal: Module 100G/400G dañuy jëfandikoo osilatër yu wuute 156,25 MHz wala 312,500 MHz ak<50 fs RMS jitter (integrated over 12 kHz–20 MHz).
-sinkronisaasioŋ chaine yu bari
Liggéeyukaay bi: Sinkronisaasioŋ fase ci modulu chaine yu bari (lu melni, CFP2/QSFP{4}}DD).
Xarala yu am solo yi: Osilatëri différentiel yu bari (lu melni LVDS yu am 4 chaine) dañuy wàññi skew ba ±50 ps.
kompensaasioŋ tàngoor
TCXO bu wuute: Dafay boole ay kaptëru tàngoor ak ay algorithm ngir mëna am ±2.5 ppm ci diggante -40 degre ba 85 degre.
IV. Tendensi usine ak tegtali tànneef
Xarala yu bees yi
Frequency yu gëna kawe: osilatëri 224 GHz leegi dañuy jàppale module optik yu 1.6T.
Dañuy gëna ndaw: 2520 koli (2,5×2,5 mm) ñooy wecci 5032/7050 koli CPO (Co{5}}Optik yuñ defar).
Mboolem: Osilatër yi am ay filtre doole yuñ tabax ci biir ak spectre bu tasaaroo dañuy wàññi jafe-jafey sircuit bi.
Xeetu tànneef yiñ gëna am solo (Grade Industriel)
|
Parametre |
Li ñuy laaj |
|
Range fréquence |
10-3000 MHz |
|
Dañuy dakkal fréquence |
±25 ppm |
|
Jitter fase |
<100 fs RMS (12k–20M) |
|
Xeetu genn |
LVDS/LVPECL/HCSL |
|
Tàngooru liggéey |
-40 degre ba +105 degre |
|
Konsum kuuraŋ |
<80 mW (LVDS) |
Modèles Hangjing: 1532C6-156.250K18DTSTL, 1553D-156.250K33DTSTL, 1575C-156.250K33DTSTL, 1532D-312.500J33DTSTL, 15533D103D
-Stabilite bu kawe/-Liy laaj ci njub
TCXO (LVDS/LVPECL): Hangjing's TC32D6/TC32P6/TC53H8 mën nañu ànd ak ay tegtal yu tar:
|
Parametre |
Li ñuy laaj |
|
Range fréquence |
10-3000 MHz |
|
Frequency bu jaar yoon |
±1,0 ppm |
|
Dañuy dal |
±2.5 ppm @ -40 degre ba +85 degre |
|
Jitter fase |
<100 fs RMS (12k–20M) |
|
Xeetu genn |
LVDS/LVPECL |
|
Tàngooru liggéey |
-40 degre ba +85 degre |
|
Konsum kuuraŋ |
<80 mW (LVDS) |
Ngir osilatëri differensiyel yu am doole, jokkool ak ingenieur yiy jëfandikoo Hangjing ngir am pexe yuñ la mëna méngale.
Tëjteel
Osilatëri kristal yu wuute, ak seen bañaale EMI, jitter bu woyof, ak njariñu boole, dañu am solo ci module optik yu gaaw. Ginaaw jokkoo optik dafay gëna dem ba ci jamonoy 800G/1.6T, xaralay montu differensiel dina wéy di puus ay pexe ci liggéey bi.
