Osilɛri kristali danfaraninw: baarakɛcogo ani fɛɛrɛ jɔnjɔnw kumaɲɔgɔnya modɛli optikiw kɔnɔ

Komi optiki kumaɲɔgɔnya fɛɛrɛ be tagara ɲɛ ka taga teliyaba la, ka mɔgɔw caya, ani ka fanga dɔgɔya, wagati tagamasiɲɛw ka basigi n’u ka baara min be se ka mɔgɔw bali ka baara kɛ, o kɛra fɛɛn nafamanba ye sisitɛmu bɛɛ ka baara la. Osilɛri kristali danfaraninw, n’u ka tagamasiɲɛw yɛlɛmani cogoya kelenpe, be bɔra ka taga i n’a fɔ lɛrɛw bɔyɔrɔw jɔnjɔnw ye modɛli optikiw kɔnɔ i n’a fɔ 400G/800G optiki transceivers.

I. Lɛrɛ wajibiyalenw ani gwɛlɛya minw be sɔrɔ optiki kumaɲɔgɔnya modɛliw kɔnɔ .

Optiki kumaɲɔgɔnya fɛɛrɛw la, optiki modɛliw lo be kuran tagamasiɲɛw yɛlɛma ka kɛ optiki tagamasiɲɛw ye ka ɲɛ. Fɛɛn jɔnjɔn dɔw i n’a fɔ laser bolifɛnw, TIAw ani CDR circuits be ɲinini gwɛlɛw kɛ lɛrɛ tagamasiɲɛw kan:

Fazi mankan ni jɔrɔnanko dɔgɔman: Tagamasiɲɛ yɛlɛmani teliyaba- (misali la, 56Gbps PAM4, 112Gbps NRZ) b’a ɲini jɔrɔnanko ka kɛ 100 fs (femtoseconde hakɛ) duguma walisa ka dɔ fara biti fili hakɛ (BER) kan.

EMI fanga: Kuran yɔrɔ gɛlɛnw na minw ka modɛliw ka ca -, lɛrɛ minw be ni -kun kelen ye, olu ka teli ka ɲɔgɔn sɔsɔ.

Funteni basiginin: Modiliw ka kan ka to ka yɛlɛma yɛlɛma (±2,5 ppm wala a ka fisa n’o ye) funteni hakɛba dɔ la (-40 degere ka taga se degere 85 ma ).

II. Nafa minw be sɔrɔ kristali danfaraninw ka fɛɛrɛw la

Ni an y’u suma ni osilɛri kelen- laban ye, osilɛri kristali danfaraninw be fazi-danfara tagamasiɲɛ fila bɔ (misali la, LVDS, LVPECL), minw be sisitɛmu baarakɛcogo fisaya kosɔbɛ:

Anti-se min be se ka yɛlɛma

Mankan banni cogo min ka teli ka kɛ -: Danfara min be sɔrɔ, o be mankan min be sɔrɔ -cogo la (i n’a fɔ fanga yɛlɛmaniw ani EMI) bɔ yen ni bɔli ye.

EMI ka yeelen dɔgɔyali: Tagamasiɲɛ sira minw be ɲɔgɔn sɔsɔ, olu be kuran yɔrɔw bɔ yen, o min be yeelen dɔgɔya ni dB 20 ɲɔgɔn ye.

Signal tilenninya ɲuman

Slew rate caman: Ɲɛyirali fɛ, yɛlɛmani minw be kɛ joona joona, u be yɛlɛli ni jigi wagati surunya, o min kɔrɔtanin lo 56Gbps+ SerDes ka yɔrɔw la.

Impedansi ɲɔgɔndan: Danfara tagamasiɲɛw be bɛn 100Ω impedansi ma, o be PCB dilan cogo nɔgɔya.

Kuran min be dɔgɔya
LVDS-basiginin be danfara yɛlɛmalanw be fanga 60–70% dɔgɔya ka tɛmɛ kelen-bannanw kan, u be fanga dɔgɔman sariyaw labato i n’a fɔ QSFP-DD.

III. Aplikasiyɔn tipikali minw be kɛ optiki modɛliw kɔnɔ

SerDes ka lɛrɛ bɔyɔrɔ teliyaba-
A baarakɛcogo: A be lɛrɛw di minw be se ka PAM4 modulatɛriw ni CDR sɛrɛkiliw dɛmɛ.
Ɲɛyirali fɛ: 100G/400G modɛliw be baara kɛ ni 156,25 MHz wala 312,500 MHz danfaralanw ye minw be ni .<50 fs RMS jitter (integrated over 12 kHz–20 MHz).

Kanali caman -sinkronizasiyɔn
A baarakɛcogo: Faanw ka ɲɔgɔndan be kɛ yɔrɔ caaman na (misali la, CFP2/QSFP-DD).
Fɛɛrɛ jɔnjɔnw: Osilɛri minw be bɔ danfara caaman na (i n’a fɔ, LVDS min be ni kanali 4 ye) be skew dɔgɔya ka se ±50 ps ma.

Funteni sarali
TCXO danfaranin: A be funteni lɔnbaga ni sarako jateminɛnw don ɲɔgɔn na walisa ka ±2,5 ppm ka yɛlɛmani basigi sɔrɔ -40 degere ka taga se degere 85 ma .

IV. Lizini tagamasiɲɛw ani sugandili sariyaw

Fɛɛrɛ kuraw

Frekansi minw ka bon: 224 GHz osilɛriw be 1,6T optiki modɛliw dɛmɛ sisan.

Miiriya: Pake 2520 (2,5×2,5 mm) be pake 5032/7050 nɔɔ na CPO (Co-Optiki pakew) kama.

Ɲɔgɔnkunbɛn: Osilɛri minw be ni fanga filtɛriw ye ani u be jɛnsɛn, o be dɔ bɔ sɛrɛkiliw ka gwɛlɛya la.

Sugandili sariyakolo jɔnjɔnw (Industrie Grade)

1532C6-156.250K18DTSTL, 1553D-156.250K33DTSTL, 1575C-156.250K33DTSTL, 1532D-312.500J33DTSTL, 1552.33D103.

Sanfɛ-Basigi/Sanfɛ-Tiɲɛn waajibiyako
TCXO (LVDS/LVPECL): Hangjing ka TC32D6/TC32P6/TC53H8 seri be bɛn ni sariya gwɛlɛw ye:

Ka ɲɛsin osilɛri danfaraninw ma minw be baara kɛ koɲuman, aw ka Hangjing ka baarakɛcogo lɔnbagaw weele walisa ka fɛɛrɛw sɔrɔ minw be bɛn n’aw yɛrɛ ye.

Kuma laban

Osilɛri kristali danfaraninw, n’u ka EMI fanga, jitter dɔgɔman, ani ɲɔgɔndan nafaw, o nafa ka bon -modɛliw optiki teliya la. Komi kumaɲɔgɔnya optiki be tagara ɲɛ ka don 800G/1.6T wagati la, wagati danfaranin fɛɛrɛ bena to ka baarakɛyɔrɔ ka baarakɛcogo dancɛw yɛlɛma.