Ọganihu nyocha nke ihe na-eme ka ihe dị nro nke lithium niobate electro-optic modulator dị mfe

Ọganihu nnyocha nkeihe nkiri dị gịrịgịrị lithium niobate electro-optic modulator

Ihe na-eme ka elektrọnik rụọ ọrụ bụ isi ihe dị na sistemụ nkwukọrịta anya na sistemụ microwave photonic. Ọ na-achịkwa ìhè na-agbasa n'ime oghere efu ma ọ bụ ntuziaka wavelength site na ịgbanwe ndeksi refractive nke ihe sitere na ubi eletriki etinyere.ihe na-eme ka ihe na-arụ ọrụ elektrọnik rụọ ọrụna-eji ihe lithium niobate buru ibu dị ka ihe electro-optical. A na-etinye ihe lithium niobate kristal otu n'ime ya n'ime mpaghara iji mepụta nduzi wave site na mgbasa titanium ma ọ bụ usoro mgbanwe proton. Ọdịiche nke ihe nrịbama refractive dị n'etiti oyi akwa isi na oyi akwa mkpuchi dị obere nke ukwuu, onye ndu wave nwekwara ike ijikọ na ubi ọkụ. Ogologo zuru oke nke ihe modulator electro-optic nke a kpọchiri akpọchi na-abụkarị 5-10 cm.

Teknụzụ Lithium Niobate na Insulator (LNOI) na-enye ụzọ dị irè isi dozie nsogbu nke nnukwu nha nke lithium niobate electro-optic modulator. Ọdịiche nke refractive index dị n'etiti waveguide core layer na cladding layer ruru 0.7, nke na-eme ka ikike njikọ optical mode na mmetụta nhazi electro-optical nke waveguide dịkwuo mma nke ukwuu, ọ ghọwokwa ebe a na-eme nnyocha na ngalaba electro-optical modulator.

N'ihi ọganihu nke teknụzụ micro-machining, mmepe nke electro-optic modulators dabere na ikpo okwu LNOI enweela ọganihu ngwa ngwa, na-egosi usoro nke obere nha na mmezi arụmọrụ na-aga n'ihu. Dịka usoro waveguide ejiri mee ihe si dị, ihe modulators electro-optic lithium niobate nke dị gịrịgịrị bụ ihe modulators electro-optic waveguide e sere ozugbo, nke ejiri ngwakọ jupụta.ndị na-eme ka e nwee ihe nhazi ebili mmirina ngwakọ silicon nke nwere usoro electro-optic modulators nke na-eduzi waveguide.

Ugbu a, mmezi nke usoro etching akọrọ na-ebelata nke ukwuu mfu nke ntuziaka waveguide lithium niobate dị gịrịgịrị, usoro ibu ridge na-edozi nsogbu nke nsogbu usoro etching dị elu, ma achọpụtala na lithium niobate electro-optic modulator nwere voltaji nke na-erughị 1 V ọkara wave, njikọta ya na teknụzụ SOI tozuru oke na-agbaso usoro nke photon na njikọ electron. Teknụzụ lithium niobate dị gịrịgịrị nwere uru n'ịhụ obere mfu, obere nha na nnukwu bandwidth integrated electro-optic modulator na chip. N'echiche, a na-ebu amụma na push-pull nke 3mm dị gịrịgịrị lithium niobateM⁃Z modulator3dB electro-optical bandwit nwere ike iru ruo 400 GHz, a kọwokwa na bandwit nke lithium niobate film thinner modulator nke a kwadebere n'ule karịrị 100 GHz, nke ka dị anya na oke elu nke echiche. Mmezi nke e wetara site na imeziwanye paramita nhazi bụ isi dị oke. N'ọdịnihu, site n'echiche nke inyocha usoro na nhazi ọhụrụ, dịka imepụta electrode waveguide coplanar ọkọlọtọ dị ka electrode microwave nkewa, arụmọrụ nke modulator nwere ike imeziwanye.

Tinyere nke ahụ, mmezu nke nkwakọ ngwaahịa mgbawa modulator agbakwunyere na njikọta dị iche iche na lasers, ihe nchọpụta na ngwaọrụ ndị ọzọ bụ ma ohere ma ihe ịma aka maka mmepe nke modulators lithium niobate dị gịrịgịrị n'ọdịnihu. Mpempe lithium niobate electro-optic modulator dị gịrịgịrị ga-arụ ọrụ dị mkpa karịa na microwave photon, nkwukọrịta anya na mpaghara ndị ọzọ.