Chiwembu cha kuwonda pafupipafupi kwapang'onopang'ono kutengera MZM modulator

Chiwembu cha kuwala pafupipafupi kupatulira kutengeraMtengo wa MZM

Kubalalitsa kwafupipafupi kungagwiritsidwe ntchito ngati liDARgwero lowalakutulutsa nthawi imodzi ndikujambula mbali zosiyanasiyana, ndipo ingagwiritsidwenso ntchito ngati kuwala kwamitundu yambiri ya 800G FR4, kuchotsa dongosolo la MUX. Nthawi zambiri, gwero la kuwala kwamitundu yambiri limakhala lamphamvu kapena losapakidwa bwino, ndipo pamakhala mavuto ambiri. Dongosolo lomwe lidayambitsidwa masiku ano lili ndi zabwino zambiri ndipo zitha kutchulidwa kuti zifotokozedwe. Chithunzi chake chojambula chikuwonetsedwa motere: Mphamvu yapamwambaDFB laserGwero la kuwala ndi kuwala kwa CW mu nthawi yanthawi komanso kutalika kwa mafunde amodzi pafupipafupi. Pambuyo podutsa amodulitandi ma frequency modulation fRF, bandeji yam'mbali idzapangidwa, ndipo nthawi ya bandendi yam'mbali ndi ma frequency modulated fRF. The modulator amagwiritsa LNOI modulator ndi kutalika kwa 8.2mm, monga momwe chithunzi b. Pambuyo pa gawo lalitali lamphamvu-mphamvugawo modulator, ma frequency amasinthasintha nawonso ndi fRF, ndipo gawo lake liyenera kupanga cholumikizira kapena cholumikizira cha siginecha ya RF ndi kugunda kwamphamvu kolumikizana, zomwe zimapangitsa kuti pakhale phokoso lalikulu, zomwe zimapangitsa kuti pakhale mano owoneka bwino. Kukondera kwa DC ndi kuya kwa modulator kungakhudze kutsetsereka kwa mawonekedwe afupipafupi a kuwala.

Mwamasamu, chizindikiritso pambuyo poti gawo lowunikira lisinthidwa ndi modulator ndi:
Zitha kuwoneka kuti gawo la kuwala kotulutsa ndi kufalikira kwafupipafupi komwe kumakhala ndi nthawi yafupipafupi ya wrf, ndipo kuchulukira kwa dzino lakumaso kwafupipafupi kumagwirizana ndi mphamvu yamagetsi ya DFB. Poyerekeza mphamvu ya kuwala kudutsa MZM modulator ndiPM gawo module, ndiyeno FFT, mawonekedwe a optical frequency dispersion sipekitiramu amapezeka. Chithunzi chotsatirachi chikuwonetsa mgwirizano wapakati pakati pa kuwala kwafupipafupi kwa kuwala ndi modulator DC kukondera komanso kuya kwa kusinthasintha kutengera kayesedwe kameneka.

Chithunzi chotsatirachi chikuwonetsa chojambula chofananira chokhala ndi MZM bias DC ya 0.6π ndi kuya kwa kusinthasintha kwa 0.4π, zomwe zimasonyeza kuti kusalala kwake ndi <5dB.

Zotsatirazi ndi chithunzi cha phukusi la MZM modulator, LN ndi 500nm wandiweyani, kuya kwa etching ndi 260nm, ndi waveguide m'lifupi ndi 1.5um. Makulidwe a electrode yagolide ndi 1.2um. Makulidwe a chapamwamba cladding SIO2 ndi 2um.

Zotsatirazi ndi mawonekedwe a OFC yoyesedwa, yokhala ndi mano 13 optical sparse and flatness <2.4dB. Ma frequency osinthira ndi 5GHz, ndipo mphamvu ya RF yotsegula mu MZM ndi PM ndi 11.24 dBm ndi 24.96dBm motsatana. Kuchuluka kwa mano ochititsa chidwi pafupipafupi kufalikira kumatha kuonjezeredwa powonjezera mphamvu ya PM-RF, ndipo nthawi yotalikirana yowoneka bwino imatha kuchulukitsidwa pakuwonjezera kusinthasintha kwanthawi yayitali. chithunzi
Zomwe zili pamwambazi zachokera pa chiwembu cha LNOI, ndipo zotsatirazi zimachokera ku chiwembu cha IIIV. Chithunzi chojambulachi chili motere: Chip chimaphatikizapo DBR laser, MZM modulator, PM phase modulator, SOA ndi SSC. Chip chimodzi chimatha kukwaniritsa kuwonda kwafupipafupi kwa mawonekedwe apamwamba.

SMSR ya laser DBR ndi 35dB, m'lifupi mwake ndi 38MHz, ndi kusintha kwa 9nm.

Modulator ya MZM imagwiritsidwa ntchito kupanga bandeji yam'mbali yokhala ndi kutalika kwa 1mm ndi bandwidth ya 7GHz@3dB yokha. Zochepa kwambiri ndi kusagwirizana kwa impedance, kutayika kwa kuwala mpaka 20dB@-8B kukondera

Utali wa SOA ndi 500µm, womwe umagwiritsidwa ntchito kubweza kutayika kwa kusinthika kwa kuwala, ndipo bandwidth yowonera ndi 62nm@3dB@90mA. The Integrated SSC pa zotuluka imapangitsa kuti chip chigwirizane bwino (chogwirizanitsa bwino ndi 5dB). Mphamvu yomaliza yotulutsa ili pafupi −7dBm.

Kuti apange ma frequency optical dispersion, ma frequency modulation a RF omwe amagwiritsidwa ntchito ndi 2.6GHz, mphamvu ndi 24.7dBm, ndipo Vpi ya gawo modulator ndi 5V. Chithunzi chomwe chili pansipa ndi chotsatira cha photophobic spectrum chokhala ndi mano 17 a photophobic @10dB ndi SNSR apamwamba kuposa 30dB.

Chiwembucho chimapangidwira kufalitsa kwa microwave kwa 5G, ndipo chiwerengero chotsatira ndicho chigawo cha spectrum chomwe chimazindikiridwa ndi chowunikira kuwala, chomwe chingapangitse zizindikiro za 26G ndi 10 nthawi zambiri. Sizinatchulidwe apa.

Mwachidule, mawonekedwe owoneka bwino opangidwa ndi njirayi amakhala ndi nthawi yokhazikika pafupipafupi, phokoso lotsika, mphamvu yayikulu komanso kuphatikiza kosavuta, koma palinso mavuto angapo. Chizindikiro cha RF chopakidwa pa PM chimafunikira mphamvu yayikulu, kugwiritsa ntchito mphamvu zambiri, ndipo nthawi yocheperako imachepetsedwa ndi kusinthasintha, mpaka 50GHz, yomwe imafuna nthawi yokulirapo (nthawi zambiri> 10nm) mu FR8 system. Kugwiritsa ntchito mochepa, kukhazikika kwamphamvu sikukwanira.