Compact Silicon-Based OptloelectronicIQ ModulatorRau Kev Sib Txuas Lus High-Ceev
Qhov xav tau nce ntxiv rau cov ntaub ntawv sib kis ntau dua thiab ntau lub zog hloov kho hauv cov chaw ntawm cov chaw txhim kho kev ua haujlwm siabKho qhov muag ModulatorsCov. Silicon raws li cov thev naus laus zis oproelectronic (siph) tau dhau los ua lub platform rau kev sib koom ua ke ntau lub photonic rau ntawm ib qho nti, ua kom cov kev daws teeb meem. Kab lus no yuav tshawb txog cov tshiab cab kuj suppressed silicon iq modulator raws li gesi eams, uas tuaj yeem ua haujlwm ntawm ib zaus txog li 75 gbaud.
Ntaus Cov Qauv Tsim Thiab Cov Yam ntxwv
Qhov lus thov IQ Modulator tau txais ib qho kev sib cog lus peb caj npab qauv, raws li muaj nyob hauv daim duab 1 (a). Muaj li ntawm peb gesi eam thiab peb thermo optical theem ua haujlwm, tau txais cov kev teeb tsa Saifetrical. Lub tswv yim lub teeb tau txuas mus rau hauv lub nti los ntawm kev sib koom ua ke txuas ntxiv (GC) thiab muab faib ua keyog ua peb txoj kev hla ntawm 1 × 3 "Ntau yam cuam tshuam nrog (MMI). Tom qab dhau los ntawm Modulator thiab theem shifter, lub teeb yog qhov ua yeeb yaj kiab, lub teeb yog qhov ua yeeb yaj kiab los ntawm lwm 1 × 3 mmi thiab ces txuas rau ib-hom fiber ntau (SSMF).
Daim duab 1: (a) duab me me ntawm IQ Modulator; (b) - (d) EO S21, Extinction piv rau Spectrum, thiab kev hloov chaw ntawm ib qho Gesi Eames; (e) schematic daim duab ntawm IQ modulator thiab coj ua ntu ntawm theem ntawm theem shifter; (f) Cov neeg muaj cov neeg muaj kev sawv cev sawv cev ntawm cov dav hlau nyuaj. Raws li pom hauv daim duab 1 (b), gesi eam muaj qhov dav electro-optic bandwidth. Daim duab 1 (b) ntsuas S21 ntsuas ntawm ib tus qauv gesi ntawm ib tus qauv gesi siv ib qho 67 ghz optical tivthaiv analyzer (LCA). Cov nuj nqis 1 (C) thiab 1 (d) piav qhia txog qhov sib txawv ntawm dc voltages thiab qhov kis tau ntawm ib qho wavelength ntawm 1555 nanometers.
Raws li muaj nyob hauv daim duab 1 (e), lub ntsiab tseem ceeb ntawm cov qauv no yog muaj peev xwm los hais txog cov khoom siv kho qhov muag ntawm theem sib xyaw ua ke. Theem sib txawv ntawm cov caj npab sab saud thiab qis dua yog π / 2, siv rau cov theem sib txawv, thaum theem sib txawv ntawm nruab nrab yog -3 π / 4. Qhov kev teeb tsa no tso cai rau kev cuam tshuam kev ua kom puas rau cov cab kuj, raws li qhia hauv lub dav hlau nyuaj ntawm daim duab 1 (f).
Sim teeb tsa thiab cov txiaj ntsig tau
Lub teeb meem kev sim siab tshaj plaws yog qhia hauv daim duab 2 (a). Ib qho kev txiav tawm waveFormator (Keysight M8194A) yog siv los ua lub cim kos npe, thiab ob qib 60 GHz theem sib phim RF Lub bias voltage ntawm gesi eam yog -2.5 v, thiab theem sib tw rf cable yog siv los txo cov theem tsis haum ntawm I thiab Q Raws.
Daim duab 2: (a) Cov neeg muaj kev sim siab nrawm, (B) cov neeg muaj peev xwm ntawm 70 gbaud, (c) tus lej yuam kev thiab cov ntaub ntawv, (d) constellation ntawm 70 GBAd. Siv kev lag luam sab nraud kab noj hniav laser (ECL) nrog ib kab ntawm 100 KHz, nthwv dej ntawm 1555 nm, thiab lub zog ntawm 12 dbm ua cov cab kuj kho qhov muag. Tom qab kev hloov kho, lub teeb liab kho qhov muag tau ua kom nrov siv ib qhoerbium-doped fiber ntau(Edfa) kom them nyiaj rau on-chip txuas ntxiv los thiab modulator cov ntawv tso tseg poob.
Ntawm qhov tau txais kawg, ib qho kho qhov muag tshuaj analyzer (OSA) cov teeb liab kev teeb liab thiab cov nroj tsuag supression, raws li qhia hauv daim duab 2 (b) rau ib lub teeb liab 70 gbaud. Siv tus lej polarization ob lub ntsej muag tau txais cov cim, uas muaj 90 degree kho cov tov khoom thiab plaub40 GHz Balanced photodes, thiab txuas nrog rau 33 GHz, 80 gsa / s real-sij hawm oscilloscope (roto) (Keysight Dsoz634A). Qhov ECL thib ob nrog ib kab ntawm 100 KHz yog siv los ua cov oscillator hauv zos (LO). Vim yog lub transmitter ua haujlwm nyob rau hauv ib leeg polarization tej xwm txheej, tsuas yog ob lub ntsuas hluav taws xob siv rau kev hloov pauv hluav taws xob (ADC). Cov ntaub ntawv tau sau tseg ntawm RTO thiab ua tiav siv lub cim offline digital signal (DSP).
Raws li pom hauv daim duab 2 (c), IQ tus modulator tau sim siv QINTK HLOOV TXHUA YAM LOS NTAWM 40 GBAd rau 75 GBAUN. Cov txiaj ntsig tau qhia tias kev txiav txim siab nyuaj hauv 7% kev txiav txim siab yooj yim dua rau qhov kev hloov kho (HD-FEC) cov xwm txheej, tus nqi tuaj yeem ncav cuag 140 GB / s; Nyob rau hauv cov xwm txheej ntawm 20% kev txiav txim siab mos muag rau tom qab kev txhim kho (SD-FEC), qhov nrawm tuaj yeem ncav cuag 150 GB / s. Lub constellation daim duab ntawm 70 Gbaud yog muaj nyob hauv daim duab 2 (d). Qhov tshwm sim tsuas yog txwv los ntawm cov oscilloscope bandwidth ntawm 33 ghz, uas yog sib npaug rau ib tug teeb liab bandwidth ntawm kwv yees li 66 GBaud.
Raws li muaj nyob hauv daim duab 2 (b), peb txhais caj npab qauv yuav ua tau zoo rau kev txwv tsis pub kho qhov muag cov khoom siv nrog tus lej pam tshaj 30 dB. Cov qauv no tsis tas yuav ua tiav cov cab kuj tuaj yeem siv tau rau cov neeg nqa khoom kom rov qab ua cov paib rov qab, KRAMER Kronig (kk) cov neeg tau txais. Cov cab kuj tuaj yeem hloov kho los ntawm lub hauv paus theem theem shifter kom ua tiav cov cab kuj xav tau mus rau Sabband piv (CSR).
Qhov Zoo thiab Cov Ntawv Thov
Piv nrog tsoos machingnender modulators (MZM Modelulators) Thiab lwm yam silicon-based Optloelctronic IQ modulators, cov lus pom silicon iQ modulator muaj ntau qhov zoo. Firstly, nws yog qhov loj me, ntau dua 10 zaug me dua IQ modulators rawsMach Zubrder Modulators(tsis suav nrog kev sib koom ua ke pads), yog li ua kom muaj kev sib koom ua ke ntom ntom thiab txo qhov chaw nti. Qhov thib ob, cov qauv ntim hluav taws xob tsis tas yuav tsis tas yuav tsum siv cov terminal de zog, yog li txo ntaus ntawv thiab lub zog ib zaug. Thib peb, tus neeg nqa khoom hluav taws xob muaj peev xwm ua kom muaj kev txo qis ntawm cov kis tus mob, txhim kho kev txuag hluav taws xob ntxiv.
Tsis tas li ntawd, lub ntsuas hluav taws xob ntawm Gesi Eam yog dav heev (dhau 30 nanometers tswj kev hloov kho microwave (m micringave modulators (makms), yog li ntawd ua rau tus qauv tsim.
Qhov kev sib xyaw no thiab cov IQ tus modulator yog tsim nyog rau cov khoom lag luam tom ntej no hauv cov chaw hauv cov ntaub ntawv, ua kom muaj peev xwm ntau dua thiab kev sib txuas lus ntau dua.
Tus cab kuj suppressed silicon iq modulator cov khoom pov thawj zoo ua tau zoo, nrog cov ntaub ntawv kis tau zoo, nrog cov ntaub ntawv kis tau zoo txog 150 GB / S nyob rau hauv 20% SD-FEC. Nws cov compact 3-caj npab qauv raws li Gesi Eole muaj qhov tseem ceeb hauv kev hneev, hluav taws xob ua haujlwm, thiab tsim yooj yim. Tus modulator no muaj peev xwm los suppress lossis kho cov cab kuj kho qhov muag thiab tuaj yeem sib xyaw nrog cov kab sib xyaw rau cov kab kev sib hloov. Cov kev ua tiav pom kev ua tiav ntawm kev ua tiav ntawm kev sib txuam thiab cov ntaub ntawv kev sib txuas lus zoo rau cov chaw sib txuas lus hauv cov ntaub ntawv thiab lwm thaj teb.
Lub Sijhawm Post: Jan-21-2025