Taurira modulator yesilicon photonic Mach-Zehnder MZM modulator

Taurira modulator yesilicon photonic Mach-ZehnderMugadziri weMZM

Mach-Zehnder modulator ndiyo inonyanya kukosha pa transmitter end mu 400G/800G silicon photonic modules. Parizvino, kune mhando mbiri dze modulator pa transmitter end ye mass-produced silicon photonic modules: Rudzi rumwe iPAM4 modulator yakavakirwa pa single-channel 100Gbps working mode, iyo inoita kuti data transmission ye 800Gbps isvike kuburikidza ne 4-channel / 8-channel parallel approach uye inonyanya kushandiswa munzvimbo dze data neGpus. Ehe, single-channel 200Gbps silicon photonics Mach-Zender modulator ichakwikwidzana neEML mushure mekugadzirwa kwe mass pa 100Gbps haifanirwe kunge iri kure. Rudzi rwechipiri ndirwomodulator yeIQinoshandiswa mukukurukurirana kwe optical coherent kure. Kunyura kwakabatana kwataurwa padanho rino kunoreva daro rekutumirwa kwema optical modules kubva pazviuru zvemakiromita mu metropolitan backbone network kusvika kuma ZR optical modules kubva pamakiromita makumi masere kusvika zana nemakumi maviri, uye kunyangwe kusvika kuma LR optical modules kubva pamakiromita gumi mune ramangwana.

Nheyo yekumhanya zvakanyanyamamodulator esiliconinogona kukamurwa kuita zvikamu zviviri: optics nemagetsi.

Chikamu cheOptical: Musimboti wekutanga iMach-Zehnder interferometer. Mwenje wechiedza unopfuura nepakati pe50-50 beam splitter uye unova mwenje miviri yechiedza ine simba rakaenzana, iyo inoramba ichitumirwa mumaoko maviri emodulator. Nekutonga kwechikamu pane rimwe remaoko (ndiko kuti, refractive index yesilicon inoshandurwa neheater kuti ichinje kumhanya kwekupararira kweruoko rumwe), musanganiswa wekupedzisira wedanda unoitwa pakubuda kwemaoko ese ari maviri. Kureba kwechikamu chekupindira (apo misoro yemaoko ese ari maviri inosvika panguva imwe chete) uye kukanzurwa kwekuvhiringidza (apo musiyano wechikamu uri 90° uye misoro iri mhiri kwezvirongo) zvinogona kuwanikwa kuburikidza nekupindira, nokudaro zvichichinja simba rechiedza (rinogona kunzwisiswa se1 ne0 mumasaini edhijitari). Uku kunzwisisa kuri nyore uye zvakare nzira yekudzora yenzvimbo yekushanda mubasa rekushanda. Semuenzaniso, mukutaurirana kwedata, tinoshanda panzvimbo ye3dB yakaderera pane peak, uye mukutaurirana kwakabatana, tinoshanda pasina nzvimbo yechiedza. Zvisinei, nzira iyi yekudzora musiyano wechikamu kuburikidza nekupisa uye kupisa kudzora chiratidzo chekubuda chinotora nguva yakareba uye haigone kuzadzisa zvinodiwa zvedu zvekutumira 100Gpbs pasekondi. Saka, tinofanira kutsvaga nzira yekukurumidzira modulation.

Chikamu chemagetsi chinonyanya kuumbwa nechikamu chePN junction chinoda kuchinja refractive index pa high frequency, uye traveling wave electrode structure inoenderana nekumhanya kwe electrical signal uye optical signal. Nheyo yekushandura refractive index i plasma dispersion effect, inozivikanwawo se free carrier dispersion effect. Inoreva physical effect iyo kana concentration ye free carriers mu semiconductor material ichichinja, zvikamu zvechokwadi uye zvekufungidzira zve refractive index yechinhu chacho zvinochinjawo zvinoenderana. Kana carrier concentration mu semiconductor materials ichiwedzera, absorption coefficient yechinhu ichi inowedzera nepo chikamu chaicho che refractive index ichiderera. Saizvozvowo, kana carriers mu semiconductor materials ichiderera, absorption coefficient inoderera nepo chikamu chaicho che refractive index chichiwedzera. Nemhedzisiro yakadaro, mumashandisirwo anoshanda, modulation ye high-frequency signals inogona kuwanikwa nekudzora huwandu hwe carriers mu transmission waveguide. Pakupedzisira, 0 ne 1 signals dzinoonekwa panzvimbo yekubuda, dzichiisa high-speed electrical signals pa amplitude ye light intensity. Nzira yekuzadzisa izvi ndeye kuburikidza nePN junction. Zvishandiso zvesilicon yakachena hazvina kukwana, uye shanduko yehuwandu haina kukwana kusangana neshanduko ye refractive index. Nokudaro, zvakakosha kuwedzera carrier base mu transmission waveguide nekushandisa doping silicon kuti uwane shanduko mu refractive index, nokudaro zvichiita kuti pave ne higher rate modulation.