Optical frequency comb uye optical kutapurirana?

Isu tinoziva kuti kubva kuma1990s, WDM wavelength division multiplexing tekinoroji yakashandiswa kureba-refu fiber optic links inotora mazana kana kunyange zviuru zvemakiromita. Kune nyika zhinji nematunhu, fiber optic zvivakwa ndiyo yavo inodhura zvakanyanya, nepo mutengo we transceiver zvikamu wakaderera.

Zvisinei, nekukura kunoputika kwehuwandu hwekutengesa data network yakadai se5G, teknolojia yeWDM yave ichinyanya kukosha muzvikamu zviduku zvishoma, uye kuendeswa kwehuwandu hwezvisungo zvipfupi zvakakura zvikuru, zvichiita kuti mari uye hukuru hwezvikamu zve transceiver zvive zvakanyanya.

Parizvino, ma network aya achiri kuvimba nezviuru zve-single-mode optical fibers yekufambisa kwakafanana kuburikidza nechadenga division multiplexing channels, uye chiyero che data chechiteshi chega chega chakaderera, kunyanya mazana mashoma Gbit/s (800G). T-level inogona kunge iine mashoma maapplication.

Asi mune ramangwana rinoonekwa, iyo pfungwa yeyakajairwa nzvimbo yekufananidza ichakurumidza kusvika painogumira scalability, uye inofanirwa kuwedzeredzwa nekufananidzira kufananidzwa kwedhata hova mune imwe neimwe fiber kuchengetedza kumwe kuvandudzwa kwemazinga e data. Izvi zvinogona kuvhura nzvimbo nyowani yekunyorera yewavelength division multiplexing tekinoroji, uko kukwira kwakanyanya kwenhamba yechiteshi uye chiyero chedata kwakakosha.

Muchiitiko ichi, iyo frequency comb jenareta (FCG), seyakakwana uye yakagadziriswa yakawanda wavelength chiedza sosi, inogona kupa huwandu hukuru hweakanyatsotsanangurwa optical carriers, nokudaro achitamba basa rakakosha. Pamusoro pezvo, mukana wakanyanya kukosha weoptical frequency comb ndeyekuti mitsetse yecomb inonyanya kuenzana mukuwanda, iyo inogona kudzoreredza zvinodikanwa zvemabhendi epakati chiteshi uye kudzivirira frequency control inodiwa pamitsara imwechete muzvirongwa zvechinyakare uchishandisa DFB laser arrays.

Izvo zvinofanirwa kucherechedzwa kuti aya mabhenefiti haangoshanda kune iyo yavevelength division multiplexing, asi zvakare kune inogamuchira, uko discrete yemunharaunda oscillator (LO) array inogona kutsiviwa neimwechete comb jenareta. Iko kushandiswa kweLO comb jenareta kunogona kufambisira mberi kufambisa chiratidzo chedhijitari muwavelength division multiplexing chiteshi, nekudaro ichidzikisa kuomarara kwekugamuchira uye nekuvandudza chikamu chekushivirira.

Uye zvakare, kushandisa LO comb masaini ane phase-yakakiyiwa basa reinoenderana yakabatana yekugamuchira inogona kutogadzirazve iyo nguva-domain waveform yeiyo yese wavelength division multiplexing chiratidzo, nekudaro kuripa kukuvadzwa kwakakonzerwa neiyo optical nonlinearity yekutapurirana fiber. Pamusoro pezvakanakira zvekufungidzira zvichibva pakufambiswa kwechiratidzo checomb, saizi diki uye hupfumi hunobudirira hukuru-hukuru kugadzirwa zvakare zvinhu zvakakosha zveramangwana wavelength division multiplexing transceivers.

Naizvozvo, pakati peakasiyana comb chiratidzo jenareta, chip level zvishandiso zvinonyanya kukosha. Kana yasanganiswa neakanyanya scalable photonic integrated circuits for data signal modulation, multiplexing, routing, and reception, midziyo yakadaro inogona kuva kiyi kune compact uye inobudirira wavelength division multiplexing transceivers inogona kugadzirwa yakawanda pamutengo wakaderera, ine simba rekutumira makumi e Tbit / s pa fiber.

Pakubuda kwekupedzisira kwekutumira, chiteshi chega chega chinosanganiswa kuburikidza nemultiplexer (MUX), uye wavelength division multiplexing chiratidzo chinoparidzirwa kuburikidza ne single-mode fiber. Pakupera kwekugamuchira, iyo wavelength division multiplexing receiver (WDM Rx) inoshandisa LO local oscillator yechipiri FCG yeakawanda wavelength kukanganiswa kuona. Iyo chiteshi chekuisa wavelength division multiplexing siginecha inopatsanurwa ne demultiplexer uye yozotumirwa kune yakabatana yekugamuchira array (Coh. Rx). Pakati pavo, iyo demultiplexing frequency yeiyo yemuno oscillator LO inoshandiswa sechikamu chereferensi kune yega yega inogamuchira. Kuita kweiyi wavelength division multiplexing link zviripachena kunoenderana zvakanyanya neiyo basic comb signal jenareta, kunyanya hupamhi hwechiedza uye simba rekuona remutsetse wega wega wecomb.

Ehe, optical frequency comb tekinoroji ichiri mudanho rekusimudzira, uye mamiriro ayo ekushandisa uye saizi yemusika idiki. Kana ichikwanisa kukurira mabhodhoro etekinoroji, kuderedza mitengo, uye kugadzirisa kuvimbika, inogona kuzadzisa zviyero zvemashandisirwo ekufambisa kwemaziso.