Makirci na bakin ciki na mitar gani bisaMZM modulator
Ana iya amfani da watsawar mitar gani azaman liDARtushen haskedon watsawa lokaci guda da dubawa a wurare daban-daban, kuma ana iya amfani da shi azaman tushen haske mai tsayi da yawa na 800G FR4, yana kawar da tsarin MUX. Yawancin lokaci, tushen haske mai tsayi da yawa ko dai ƙananan ƙarfi ne ko kuma ba a cika shi da kyau ba, kuma akwai matsaloli da yawa. Shirin da aka gabatar a yau yana da fa'idodi da yawa kuma ana iya komawa zuwa ga tunani. An nuna hoton tsarinsa kamar haka: Babban ikoFarashin DFBMadogarar haske shine hasken CW a cikin yankin lokaci da tsayin raƙuman ruwa guda ɗaya a mita. Bayan wucewa ta amai daidaitawatare da ƙayyadaddun mitar fRF, za a samar da bandeji na gefe, kuma tazarar gefen gefen shine mitar fRF ɗin da aka daidaita. Modulator yana amfani da na'urar Modulator na LNOI mai tsayin 8.2mm, kamar yadda aka nuna a Hoto b. Bayan dogon sashe na babban ikolokaci modulator, mitar daidaitawa kuma fRF ne, kuma lokacin sa yana buƙatar yin ƙwanƙwasa ko tudun siginar RF da bugun bugun haske dangane da juna, yana haifar da ƙara mai girma, yana haifar da ƙarin haƙoran gani. Ƙaunar DC da zurfin daidaitawa na modulator na iya yin tasiri ga daidaitawar mitar gani.
Ta hanyar lissafi, siginar bayan an daidaita filin haske ta hanyar modulator shine:
Ana iya ganin cewa filayen gani mai fitarwa shine watsawar mitar gani tare da tazarar mitar wrf, kuma tsananin haƙoran watsawa mitar na gani yana da alaƙa da ƙarfin gani na DFB. Ta hanyar kwatanta ƙarfin hasken da ke wucewa ta MZM modulator daPM lokaci modulator, sannan FFT, ana samun bakan watsawar mitar gani. Hoton da ke biyo baya yana nuna alaƙa kai tsaye tsakanin mitar mitar gani da nuna son rai na DC da zurfin daidaitawa dangane da wannan simintin.
Hoto mai zuwa yana nuna simintin siminti tare da son zuciya na MZM DC na 0.6π da zurfin daidaitawa na 0.4π, wanda ke nuna cewa shimfidarsa shine <5dB.
Mai zuwa shine zanen fakitin na'urar motsa jiki na MZM, LN yana da kauri 500nm, zurfin etching shine 260nm, kuma faɗin waveguide shine 1.5um. Kauri na lantarki na gwal shine 1.2um. Matsakaicin babban rufin SIO2 shine 2um.
Mai zuwa shine bakan na OFC da aka gwada, tare da hakora 13 da ba su da kyau da laushi <2.4dB. Mitar daidaitawa shine 5GHz, kuma lodin wutar RF a cikin MZM da PM shine 11.24 dBm da 24.96dBm bi da bi. Ana iya ƙara yawan haƙoran haƙoran mitar tarwatsawa ta hanyar ƙara ƙarfin PM-RF, kuma ana iya ƙara tazarar watsawar mitar gani ta ƙara mitar daidaitawa. hoto
Abin da ke sama ya dogara ne akan tsarin LNOI, kuma mai zuwa yana dogara ne akan tsarin IIIV. Tsarin tsari shine kamar haka: guntu yana haɗa DBR Laser, MZM modulator, PM phase modulator, SOA da SSC. Guntu guda ɗaya na iya cimma babban aiki mai ƙwaƙƙwaran mitar gani.
SMSR na Laser DBR shine 35dB, fadin layin shine 38MHz, kuma kewayon kunnawa shine 9nm.
Ana amfani da na'urar ƙirar MZM don samar da layin gefe tare da tsawon 1mm da bandwidth na 7GHz@3dB kawai. An iyakance shi ta hanyar rashin daidaituwa na impedance, asarar gani har zuwa 20dB@-8B son zuciya
Tsawon SOA shine 500µm, wanda aka yi amfani da shi don rama asarar bambance-bambancen na gani, kuma bandwidth na gani shine 62nm@3dB@90mA. Haɗe-haɗen SSC a fitarwa yana haɓaka haɓakar haɗin gwiwa na guntu (daidaituwar haɗin kai shine 5dB). Ƙarshen fitarwa na ƙarshe shine game da -7dBm.
Don samar da watsawar mitar gani, mitar RF ɗin da aka yi amfani da ita shine 2.6GHz, ƙarfin shine 24.7dBm, kuma Vpi na ƙirar lokaci shine 5V. Hoton da ke ƙasa shine sakamakon bakan photophobic tare da haƙoran hoto 17 @10dB da SNSR sama da 30dB.
An yi shirin ne don watsa injin microwave na 5G, kuma adadi mai zuwa shine sashin bakan da mai gano haske ya gano, wanda zai iya samar da siginar 26G da sau 10. Ba a bayyana a nan ba.
A taƙaice, mitar gani ta wannan hanya tana da tsayayyen tazarar mitar, ƙaramar ƙarar ƙararrakin lokaci, babban ƙarfi da sauƙin haɗin kai, amma kuma akwai matsaloli da yawa. Siginar RF ɗin da aka ɗora akan PM yana buƙatar babban ƙarfi, in mun gwada girman yawan wutar lantarki, kuma tazarar mitar tana iyakance ta hanyar daidaitawa, har zuwa 50GHz, wanda ke buƙatar babban tazara mai tsayi (gaba ɗaya> 10nm) a cikin tsarin FR8. Iyakantaccen amfani, kwanciyar wuta har yanzu bai isa ba.
Lokacin aikawa: Maris 19-2024