Ewebata silicon photonic Mach-Zende modulatorMZM modulator
NkeMach-zende modulator bụ ihe kachasị mkpa na njedebe transmitter na 400G/800G silicon photonic modul. Ugbu a, enwere ụdị modulators abụọ na njedebe transmitter nke silicon photonic modul emepụtara: Otu ụdị bụ PAM4 modulator dabere na otu ọwa 100Gbps na-arụ ọrụ, nke na-enweta nnyefe data 800Gbps site na ụzọ 4-channel / 8-channel yiri ma na-etinyekarị ya na ebe data na Gpus. N'ezie, otu ọwa 200Gbps silicon photonics Mach-Zeonde modulator nke ga-asọmpi EML mgbe mmepụta oke na 100Gbps ghara ịdị anya. Ụdị nke abụọ bụIQ modulatoretinyere na nkwurịta okwu ngwa anya dị ogologo. Mmikpọ a na-ejikọta ọnụ nke a kpọtụrụ aha na ọkwa ugbu a na-ezo aka na nnyefe anya nke modul anya sitere na puku kwuru puku kilomita na netwọk azụ azụ obodo ruo na ZR optical modules sitere na 80 ruo 120 kilomita, na ọbụna na modul anya LR sitere na kilomita 10 n'ọdịnihu.
Ụkpụrụ nke ngwa ngwa dị elusilicon modulatorsenwere ike kewaa ụzọ abụọ: ngwa anya na ọkụ eletrik.
Akụkụ anya: Ụkpụrụ bụ isi bụ interferometer Mach-zeund. Igwe ọkụ na-agafe na 50-50 beam splitter wee ghọọ ọkụ ọkụ abụọ na ike nhata, nke na-aga n'ihu na-ebufe na ogwe aka abụọ nke modulator. Site na njikwa oge na otu ogwe aka (ya bụ, igwe na-ekpo ọkụ na-agbanwe index refractive nke silicon ka ọ gbanwee ọsọ mgbasa nke otu ogwe aka), a na-eme ngwakọta ọkụ ikpeazụ na ọpụpụ nke ogwe aka abụọ ahụ. Ogologo oge nnyonye anya (ebe elu nke ogwe aka abụọ ahụ na-eru n'otu oge) na nkwụsịtụ nnyonye anya (ebe ọdịiche nke oge ahụ bụ 90 ° na ọnụ ọgụgụ dị elu na-emegide mmiri mmiri) nwere ike nweta site na nnyonye anya, si otú ahụ na-emegharị ọkụ ọkụ (nke nwere ike ịghọta dị ka 1 na 0 na akara ngosi dijitalụ). Nke a bụ nghọta dị mfe yana usoro nchịkwa maka ebe ọrụ na ọrụ bara uru. Dịka ọmụmaatụ, na nkwurịta okwu data, anyị na-arụ ọrụ na 3dB dị ala karịa ọnụ ọgụgụ kasị elu, na nkwurịta okwu na-ejikọta ọnụ, anyị na-arụ ọrụ n'enweghị ntụpọ ọkụ. Otú ọ dị, usoro a iji chịkwaa ọdịiche nke oge site na ikpo ọkụ na ikpo ọkụ iji chịkwaa mgbaàmà mmepụta na-ewe ogologo oge ma na-enweghị ike imezu ihe anyị chọrọ maka ịnyefe 100Gpbs kwa nkeji. Ya mere, anyị ga-achọ ụzọ iji nweta ngwa ngwa nke modulation.
Akụkụ eletrọnịkị ahụ na-enwekarị akụkụ njikọ PN nke chọrọ ịgbanwe ndetu refractive n'ogo dị elu, yana usoro elektrọd ebili mmiri na-eme njem nke dabara ọsọ nke mgbama eletrik na mgbama ngwa anya. Ụkpụrụ nke ịgbanwe index refractive bụ mmetụta mgbasa ozi plasma, nke a makwaara dị ka mmetụta mgbasa ozi na-ebu free. Ọ na-ezo aka na mmetụta anụ ahụ na mgbe ntinye nke ndị na-ebu n'efu na ihe semiconductor na-agbanwe, akụkụ ahụ dị adị na nke a na-eche n'echiche nke ihe nhụsianya nhụsianya na-agbanwekwa otú ahụ. Mgbe ntinye uche nke onye na-ebu ihe na ihe semiconductor na-abawanye, ọnụọgụ absorption nke ihe na-abawanye ebe ezigbo akụkụ nke ndezigharị refractive na-ebelata. N'otu aka ahụ, mgbe ndị na-ebu na ihe semiconductor na-ebelata, ọnụọgụ nke absorption na-ebelata ebe ezigbo akụkụ nke ndetu refractive na-abawanye. Site na mmetụta dị otú ahụ, na ngwa ndị bara uru, enwere ike ime mgbanwe nke akara ngosi dị elu site n'ịhazi ọnụ ọgụgụ nke ndị na-ebu na nnyefe waveguide. N'ikpeazụ, akara 0 na 1 na-apụta n'ọnọdụ mmepụta, na-ebunye akara ọkụ eletrik dị elu na njupụta nke ike ọkụ. Ụzọ iji nweta nke a bụ site na nkwụsị PN. Ndị na-ebu silicon dị ọcha dị ole na ole, na mgbanwe n'ọtụtụ ezughi oke iji zute mgbanwe n'ime ndetu refractive. Ya mere, ọ dị mkpa ịbawanye ihe na-ebu ibu na nnyefe waveguide site na doping silicon iji nweta mgbanwe na refractive index, si otú a na-enweta mgbanwe ọnụego dị elu.
Oge nzipu: Mee-12-2025