Tsarin rage mitar gani bisa gaMai daidaita MZM
Ana iya amfani da watsawar mitar gani azaman liDARtushen haskedon fitarwa da kuma duba a lokaci guda a hanyoyi daban-daban, kuma ana iya amfani da shi azaman tushen haske mai tsawon zango da yawa na 800G FR4, wanda ke kawar da tsarin MUX. Yawanci, tushen haske mai tsawon zango da yawa ko dai yana da ƙarancin ƙarfi ko kuma ba a shirya shi sosai ba, kuma akwai matsaloli da yawa. Tsarin da aka gabatar a yau yana da fa'idodi da yawa kuma ana iya komawa zuwa gare shi don tunani. An nuna zane-zanen tsarinsa kamar haka: Babban ƙarfinLaser DFBtushen haske shine hasken CW a yankin lokaci da kuma tsawon rai ɗaya a mita. Bayan wucewa ta cikinmai daidaitaTare da wani takamaiman mitar daidaitawa fRF, za a samar da gefen gefe, kuma tazara tsakanin gefen shine mitar daidaitawa fRF. Mai daidaitawa yana amfani da mai daidaitawa LNOI mai tsawon 8.2mm, kamar yadda aka nuna a Hoto na b. Bayan dogon sashe na babban ikomai daidaita lokaci, mitar daidaitawa ita ma fRF ce, kuma matakinta yana buƙatar yin layin ko ramin siginar RF da bugun haske dangane da juna, wanda ke haifar da babban ƙara, wanda ke haifar da ƙarin haƙoran gani. Zurfin DC na bias da zurfin daidaitawa na modulator na iya shafar lanƙwasa na watsawar mitar gani.
A fannin lissafi, siginar bayan filin haske da mai gyarawa ya daidaita ita ce:
Za a iya ganin cewa filin gani na fitarwa wani watsawar mitar gani ne tare da tazara ta mitar wrf, kuma ƙarfin haƙorin watsawar mitar gani yana da alaƙa da ƙarfin gani na DFB. Ta hanyar kwaikwayon ƙarfin haske da ke ratsa mai amfani da MZM daMai daidaita lokaci na PM, sannan FFT, ana samun bakan watsawar mitar gani. Hoto mai zuwa yana nuna alaƙar kai tsaye tsakanin lanƙwasa mitar gani da kuma bias na modulator DC da zurfin daidaitawa bisa ga wannan kwaikwayon.
Hoton da ke ƙasa yana nuna zane-zanen da aka kwaikwayi tare da MZM bias DC na 0.6π da zurfin daidaitawa na 0.4π, wanda ke nuna cewa faɗinsa <5dB ne.
Ga jadawalin fakitin na MZM modulator, LN kauri ne 500nm, zurfin etching shine 260nm, kuma faɗin jagoran raƙuman ruwa shine 1.5um. Kauri na lantarki na zinariya shine 1.2um. Kauri na saman SIO2 shine 2um.
Ga yadda aka gwada OFC, tare da haƙora 13 masu faɗi da kuma faɗin <2.4dB. Mitar daidaitawa ita ce 5GHz, kuma nauyin wutar RF a cikin MZM da PM shine 11.24 dBm da 24.96dBm bi da bi. Ana iya ƙara yawan haƙoran watsawa ta hanyar ƙara ƙarfin PM-RF, kuma ana iya ƙara tazara ta watsawa ta hanyar ƙara yawan sauyawa.
An gina abin da ke sama bisa tsarin LNOI, kuma mai zuwa ya dogara ne akan tsarin IIIV. Tsarin zane kamar haka: Chip ɗin ya haɗa da laser DBR, modulator MZM, modulator na lokaci na PM, SOA da SSC. Chip ɗaya zai iya cimma raguwar mitar gani mai ƙarfi.
SMSR na laser DBR shine 35dB, faɗin layin shine 38MHz, kuma kewayon daidaitawa shine 9nm.
Ana amfani da na'urar MZM modulator don samar da sideband mai tsawon 1mm da kuma bandwidth na 7GHz@3dB kawai. An iyakance shi musamman saboda rashin daidaiton impedance, asarar gani har zuwa 20dB@-8B bias.
Tsawon SOA shine 500µm, wanda ake amfani da shi don rama asarar bambancin gani na modulation, kuma bandwidth ɗin spectral shine 62nm@3dB@90mA. SSC ɗin da aka haɗa a wurin fitarwa yana inganta ingancin haɗin guntu (ingancin haɗin gwiwa shine 5dB). Ƙarfin fitarwa na ƙarshe shine kusan −7dBm.
Domin samar da watsawar mitar gani, mitar daidaitawar RF da ake amfani da ita ita ce 2.6GHz, ƙarfin shine 24.7dBm, kuma Vpi na mai daidaita yanayin shine 5V. Hoton da ke ƙasa shine sakamakon tasirin hasken haske tare da haƙoran hasken haske 17 @10dB da SNSR sama da 30dB.
An yi nufin wannan tsari ne don watsawa ta hanyar microwave 5G, kuma adadi mai zuwa shine ɓangaren bakan da na'urar gano haske ta gano, wanda zai iya samar da siginar 26G sau 10 na mita. Ba a faɗi hakan a nan ba.
A taƙaice, mitar gani da wannan hanyar ke samarwa tana da tazara mai ɗorewa, ƙarancin amo, babban ƙarfi da sauƙin haɗawa, amma akwai matsaloli da yawa. Siginar RF da aka ɗora akan PM tana buƙatar babban ƙarfi, yawan amfani da wutar lantarki mai yawa, kuma tazara ta mita tana iyakance ta hanyar saurin daidaitawa, har zuwa 50GHz, wanda ke buƙatar tazara mai girma (gabaɗaya > 10nm) a cikin tsarin FR8. Amfani mai iyaka, har yanzu ba shi da isasshen ƙarfi.
Lokacin Saƙo: Maris-19-2024