Lub tswv yim ntawm optical zaus thinning raws li MZM modulator

Ib lub tswv yim ntawm optical zaus thinning raws liMZM modulator

Lub optical zaus dispersion tuaj yeem siv ua liDARqhov kajmus rau ib txhij emit thiab scan nyob rau hauv sib txawv cov lus qhia, thiab nws kuj yuav siv tau raws li ib tug multi-wavelength teeb qhov chaw ntawm 800G FR4, tshem tawm cov MUX qauv. Feem ntau, lub teeb ci ntau lub teeb yog qhov tsis muaj zog lossis tsis ntim khoom zoo, thiab muaj ntau yam teeb meem. Cov tswv yim qhia niaj hnub no muaj ntau yam zoo thiab tuaj yeem raug xa mus rau kev siv. Nws cov qauv duab qhia raws li hauv qab no: Lub zog siabDFB laserLub teeb qhov chaw yog CW lub teeb nyob rau hauv lub sij hawm sau thiab ib wavelength nyob rau hauv zaus. Tom qab hla dhau ibmodulatornrog rau qee qhov kev hloov pauv zaus fRF, sab band yuav raug tsim tawm, thiab lub sij hawm sab nraud yog qhov hloov pauv zaus fRF. Lub modulator siv LNOI modulator nrog qhov ntev ntawm 8.2mm, raws li qhia hauv daim duab b. Tom qab ib ntu ntev ntawm lub zog siabtheem modulator, modulation zaus kuj yog fRF, thiab nws cov theem yuav tsum tau ua rau lub crest los yog trough ntawm lub teeb liab RF thiab lub teeb mem tes txheeb ze rau ib leeg, ua rau ib tug loj chirp, uas ua rau ntau optical hniav. DC kev tsis ncaj ncees thiab kev ntsuas qhov tob ntawm lub modulator tuaj yeem cuam tshuam qhov flatness ntawm optical zaus dispersion.

Raws li kev ua lej, lub teeb liab tom qab lub teeb teb raug hloov kho los ntawm tus modulator yog:
Nws tuaj yeem pom tau tias cov khoom siv kho qhov muag pom tau yog qhov sib txawv ntawm qhov sib txawv ntawm qhov sib txawv ntawm qhov sib txawv ntawm wrf, thiab qhov kev siv ntawm cov khoom siv kho qhov muag feem ntau cuam tshuam nrog DFB optical zog. Los ntawm kev simulating lub teeb siv dhau los ntawm MZM modulator thiabPM theem modulator, thiab tom qab ntawd FFT, tau txais qhov optical zaus dispersion spectrum. Cov duab hauv qab no qhia txog kev sib raug zoo ntawm optical zaus flatness thiab modulator DC bias thiab modulation qhov tob raws li qhov simulation no.

Cov duab hauv qab no qhia tau hais tias simulated spectral daim duab nrog MZM bias DC ntawm 0.6π thiab modulation qhov tob ntawm 0.4π, uas qhia tau hais tias nws flatness yog <5dB.

Hauv qab no yog daim duab pob ntawm MZM modulator, LN yog 500nm tuab, etching qhov tob yog 260nm, thiab lub waveguide dav yog 1.5um. Lub thickness ntawm kub electrode yog 1.2um. Lub thickness ntawm lub sab sauv cladding SIO2 yog 2um.

Cov nram qab no yog cov spectrum ntawm kev sim OFC, nrog 13 optically sparse hniav thiab flatness <2.4dB. Kev hloov pauv zaus yog 5GHz, thiab RF lub zog thauj khoom hauv MZM thiab PM yog 11.24 dBm thiab 24.96dBm feem. Tus naj npawb ntawm cov hniav ntawm optical zaus dispersion excitation tuaj yeem nce ntxiv los ntawm kev nce PM-RF lub zog, thiab lub sijhawm kho qhov muag zaus dispersion tuaj yeem nce ntxiv los ntawm kev ua kom hloov pauv zaus. duab
Cov saum toj no yog ua raws li LNOI scheme, thiab cov hauv qab no yog raws li cov txheej txheem IIIV. Daim duab kos duab yog raws li nram no: Lub nti integrates DBR laser, MZM modulator, PM theem modulator, SOA thiab SSC. Ib lub nti tuaj yeem ua tiav qhov kev ua haujlwm siab kho qhov muag zaus thinning.

Lub SMSR ntawm DBR laser yog 35dB, kab dav yog 38MHz, thiab qhov sib txawv yog 9nm.

MZM modulator yog siv los tsim cov sideband nrog qhov ntev ntawm 1mm thiab bandwidth ntawm 7GHz @ 3dB nkaus xwb. Feem ntau txwv los ntawm impedance mismatch, kho qhov muag poob mus txog 20dB @-8B bias

Lub SOA ntev yog 500µm, uas yog siv los them cov kev hloov kho qhov muag qhov sib txawv poob, thiab spectral bandwidth yog 62nm @ 3dB @ 90mA. Kev sib koom ua ke SSC ntawm cov zis txhim kho kev sib txuas ua haujlwm ntawm cov nti (coupling efficiency yog 5dB). Qhov kawg tso zis hwj chim yog hais txog -7dBm.

Txhawm rau tsim kho qhov muag zaus dispersion, RF modulation zaus siv yog 2.6GHz, lub zog yog 24.7dBm, thiab Vpi ntawm theem modulator yog 5V. Daim duab hauv qab no yog qhov tshwm sim photophobic spectrum nrog 17 photophobic hniav @ 10dB thiab SNSR siab dua 30dB.

Lub tswv yim yog npaj rau 5G microwave kis tau tus mob, thiab daim duab hauv qab no yog cov spectrum tivthaiv pom los ntawm lub teeb ntes, uas tuaj yeem tsim 26G teeb liab los ntawm 10 npaug ntawm zaus. Nws tsis tau hais ntawm no.

Nyob rau hauv cov ntsiab lus, qhov optical zaus generated los ntawm txoj kev no muaj lub sij hawm ruaj khov, tsis tshua muaj suab nrov, siab zog thiab yooj yim kev koom ua ke, tab sis kuj muaj ntau yam teeb meem. Lub teeb liab RF loaded ntawm PM xav tau lub zog loj, kev siv hluav taws xob loj, thiab lub sijhawm zaus raug txwv los ntawm kev hloov kho tus nqi, mus txog 50GHz, uas yuav tsum muaj lub caij nyoog wavelength loj dua (feem ntau> 10nm) hauv FR8 system. Kev siv tsawg, lub zog flatness tseem tsis txaus.