Lub ntsiab txhais thiab realization ntawm optical splitter multiplexer
OADM ntaus ntawv yog ib qho ntawm cov khoom siv tseem ceeb hauv txhua qhov kev kho qhov muag.WDMCov teeb liab muaj cov kab ntawm ntau lub wavelengths, uas yog multiplexed nyob rau hauv ib tug fiber ntau, thiab txhua lub wavelength channel nqa ib tug ywj siab khiav kwj.
Piv txwv tias tsuas yog ib qho wavelength ntawm lub teeb kis tau los ntawm fiber ntau; qhov no yog kim piv rau tus nqi ntawm fiber ntau. Kev xa tawm ntau lub wavelengths ntawm lub teeb hauv ib lub fiber ntau, tsis muaj kev cuam tshuam rau ib leeg, txuag nyiaj thiab nce bandwidth. Tam sim noWDMtechnology transmits optical signals ntawm ntau wavelengths nyob rau hauv ib tug fiber ntau. Optical signals ntawm txhua lub wavelength sawv cev rau ib channel, thiab ntau cov channel xa cov ntaub ntawv ib txhij nyob rau hauv ib tug fiber, uas yog, lub multiplexing ntawm ib tug fiber.
Hauv qhov chaw kho qhov muag, OADM ua haujlwm ntawm ib txwm siv hluav taws xob SDH subdivision multiplexing hauv lub sijhawm. Ntxiv mus, nws muaj pob tshab thiab muaj peev xwm ua tiav cov teeb liab ntawm txhua hom ntawv thiab tus nqi, uas yog superior rau hluav taws xob ADM (subdivision multiplexer) siv hauv SDH network.
• Nyob rau hauv txoj kev txhais tau hais tias ib tug tshiab wavelength channel yog ntxiv rau lub optical teeb liab uas nkag mus rau hauv lub optical splitter thiab yog multiplexed rau hauv lub optical fiber nrog rau lwm cov channel.
• Down txhais tau hais tias ib lub wavelength channel raug tshem tawm los ntawm cov teeb liab optical nkag mus rau hauv optical split-multiplexer, thiab lwm txoj kev ywj pheej hla ncaj qha los ntawm kev sib cais-multiplexer. Nco tseg: down channel ncaj qha mus rau cov khoom siv rau kev ua lag luam.
OADM thev naus laus zis thiab kev txhim kho cov khoom lag luam
Tam sim no, reconfigurableOADMtau dhau los ua txoj kev loj hlob. Dhau li ntawm kev siv cov kev hloov kho qhov muag kom dynamically xaiv lub sab sauv thiab sab qis, kev siv cov ntxaij lim dej tunable kuj yog qhov chaw kub.
• ltalis tshaj tawm lub tunable splitter lim ua los ntawm SiO2/Si acoustic waveguide rau 4-txoj kevWDM systemsnrog wavelength ncua sij hawm ntawm 3.2nm thiab crosstalk ntawm lub splitter raws tsawg tshaj li ib 18dB;
• Nyiv tau tshaj tawm tias OADM, uas yog tsim los ntawm semiconductor waveguides ua ke nrog vertically thiab opposite directions, muaj ib tug tunable ntau yam ntawm 11nm thiab ib tug poob kev hloov ntawm tsawg dua 1dB;
• OADM tau tshaj tawm hauv Canada yog tsim los ntawm FBG. Nyob rau hauv lub qhov rais 1.55LM, muaj 8 tunable lim nrog wavelength ncua sij hawm ntawm 0.8nm. Thermal tuning yog siv los ua lub sij hawm grating ntawm FBG linearly hloov thiab yoj band so.
• Cov kws tshawb fawb Suav kuj tau kawm OADM raws li acousto-optic tunable lim. Lub extinction piv ntawm cov cuab yeej nce mus txog 32dB thiab qhov poob qis yog 3dB.
