Webata silicon photonic Mach-Zehnder modulator MZM modulator

Webata silicon photonic Mach-Zehnder modulatorMZM modulator

Ihe modula Mach-Zehnder bụ ihe kachasị mkpa na njedebe nnyefe na modulu silicon photonic 400G/800G. Ugbu a, enwere ụdị modula abụọ na njedebe nnyefe nke modulu silicon photonic emepụtara n'ọtụtụ: Otu ụdị bụ modula PAM4 dabere na ụdị ọrụ otu ọwa 100Gbps, nke na-enweta nnyefe data 800Gbps site na usoro parallel 4-channel / 8-channel ma a na-etinye ya na ebe data na GPU. N'ezie, modula silicon photonics Mach-Zender nke otu ọwa 200Gbps nke ga-asọmpi na EML mgbe mmepụta oke na 100Gbps ekwesịghị ịdị anya. Ụdị nke abụọ bụIhe nhazi IQetinyere ya na nkwukọrịta anya dị n'etiti anya na anya. Mmikpu nke a kpọtụrụ aha n'oge a na-ezo aka na anya nnyefe nke modulu anya site na puku kilomita na netwọk azụ obodo ruo modulu anya ZR site na kilomita 80 ruo 120, na ọbụna modulu anya LR site na kilomita 10 n'ọdịnihu.

Ụkpụrụ nke ọsọ dị elundị na-eme ka silicone dịghachi ndụenwere ike kewaa ya ụzọ abụọ: optics na eletriki.

Akụkụ anya: Isi ihe dị mkpa bụ Mach-Zehnder interferometer. Ìhè na-agafe na ihe na-ekewa 50-50 beam wee ghọọ igere ìhè abụọ nwere ike nhata, nke na-aga n'ihu na-ebufe na ogwe aka abụọ nke modulator. Site na njikwa igere na otu n'ime ogwe aka (ya bụ, a na-agbanwe ihe na-eme ka silicon dị nro site na ihe na-ekpo ọkụ iji gbanwee ọsọ mgbasa nke otu ogwe aka), a na-eme ngwakọta igere ikpeazụ na ọpụpụ nke ogwe aka abụọ ahụ. Enwere ike nweta ogologo igere nnyonye anya (ebe elu nke ogwe aka abụọ na-eru n'otu oge) na kagbuo nnyonye anya (ebe ọdịiche igere dị 90° na elu dị iche na igere) site na nnyonye anya, si otú a na-agbanwe ike ọkụ (nke enwere ike ịghọta dị ka 1 na 0 na akara dijitalụ). Nke a bụ nghọta dị mfe yana usoro njikwa maka ebe ọrụ na ọrụ bara uru. Dịka ọmụmaatụ, na nkwukọrịta data, anyị na-arụ ọrụ na isi 3dB dị ala karịa elu, na na nkwukọrịta jikọtara ọnụ, anyị na-arụ ọrụ na-enweghị ebe ìhè. Agbanyeghị, usoro a nke ijikwa ọdịiche nke usoro site na ikpo ọkụ na mwepụ okpomọkụ iji chịkwaa mgbaàmà mmepụta na-ewe ogologo oge ma ọ nweghị ike imezu ihe anyị chọrọ nke izipu 100Gbps kwa sekọnd. Ya mere, anyị ga-achọ ụzọ isi nweta ọsọ ọsọ nke mgbanwe.

Ngalaba eletriki ahụ bụ akụkụ njikọ PN nke kwesịrị ịgbanwe ndeksi refractive na ugboro ugboro dị elu, yana nhazi elektrọd na-agagharị agagharị nke dabara na ọsọ nke akara eletriki na akara anya. Ụkpụrụ nke ịgbanwe ndeksi refractive bụ mmetụta mgbasa plasma, nke a makwaara dị ka mmetụta mgbasa nke ihe na-ebu free. Ọ na-ezo aka na mmetụta anụ ahụ nke na mgbe ntinye nke ndị na-ebu free na ihe semiconductor gbanwere, akụkụ n'ezie na nke a na-eche n'echiche nke ndeksi refractive nke ihe ahụ na-agbanwekwa dịka o kwesịrị. Mgbe ntinye nke ihe na-ebu na ihe semiconductor na-abawanye, ntinye nke ihe ahụ na-abawanye ebe akụkụ n'ezie nke ndeksi refractive na-ebelata. N'otu aka ahụ, mgbe ndị na-ebu na ihe semiconductor na-ebelata, ntinye nke ihe ahụ na-ebelata ebe akụkụ n'ezie nke ndeksi refractive na-abawanye. Site na mmetụta dị otú ahụ, na ngwa bara uru, enwere ike nweta mgbanwe nke akara ugboro ugboro site na ịchịkwa ọnụọgụ nke ndị na-ebu na ntuziaka nnyefe. N'ikpeazụ, akara 0 na 1 na-apụta na ọnọdụ mmepụta, na-ebu akara eletriki dị elu na oke nke ike ọkụ. Ụzọ isi mezuo nke a bụ site na njikọ PN. Ndị na-ebu silicon dị ọcha dị obere, mgbanwe dị na ọnụọgụgụ ezughi oke iji mezuo mgbanwe dị na index refractive. Ya mere, ọ dị mkpa ịbawanye ntọala onye na-ebu ibu na ntuziaka waveguide site na doping silicon iji nweta mgbanwe na index refractive, si otú a nweta mgbanwe ọnụego dị elu.