Lub teeb tsis yog hluav taws xob hluav taws xob tsim los ntawm cov hluav taws xob hauv cov txheej txheem ntawm atomic motion. Kev txav ntawm electrons hauv atoms ntawm ntau yam khoom sib txawv, yog li lub teeb nthwv dej lawv emit kuj txawv.
Spectrum yog ib tug qauv ntawm lub teeb monochromatic sib cais los ntawm ib tug dispersion system (xws li prism thiab grating) tom qab polychromatic lub teeb yog sib cais los ntawm ib tug dispersion system, uas yog teem nyob rau hauv lem raws li lub wavelength (los yog zaus). Nws yog hu ua optical spectrum nyob rau hauv tag nrho.
Thaum kuaj lub transmitter tosa, peb feem ntau koom nrog ib qho parameter, SMSR (Side Mode Suppression Ratio). Qhov piv ntawm tus nqi siab tshaj plaws ntawm lub ntsiab hom lub zog rau sab hom lub zog yog hu ua sab hom kev tiv thaiv piv, uas yog qhov tseem ceeb qhia txog kev ua haujlwm ntev ntawm hom. Feem ntau, thaum ntsuas qhov kev tsis pom zoo ntawm sab hom, nws yuav tsum tau siv ua ke nrog cov cim thiab kev tsom xam hauv spectral analyzer. Tus tsim yog siv los txheeb xyuas qhov nruab nrab nthwv dej ncov thiab qhov siab tshaj plaws thib ob nthwv dej siab tshaj. Nyeem ob lub ncov. Sab hom kev tsis lees paub piv yog qhov sib txawv ntawm lub zog ntawm ob lub ncov. Nws tuaj yeem suav tau los ntawm kev xaiv sub-xaiv hauv kev txheeb xyuas.
Nws yog txhais raws li qhov piv ntawm thawj longitudinal hom kho qhov muag fais fab M1 thiab tag nrho sab hom kho qhov muag fais fab M2 nyob rau hauv cov xwm txheej ntawm tag nrho cov kev hloov kho.
Cov mis laij lej yog:
SMSR = 10 * lg(M1/M2)
Nyob rau hauv lub optical transmitter, nws yog feem ntau teev tias tus SMSR yog ntau tshaj 30dB; uas yog, lub zog kho qhov muag ntawm thawj hom longitudinal yog ntau tshaj 1000 npaug ntawm qhov siab tshaj plaws sab hom kho qhov muag lub zog. Qhov siab dua tus nqi ntawm SMSR, qhov ntau concentrated lub teeb txoj kev. Raws li pom hauv daim duab hauv qab no: SMSR yog 51dB
Cov saum toj no yog cov lus piav qhia ntawm Lightwave kev paub coj los ntawm Shenzhen HDV Phoelectron Technology Co., Ltd., uas yog cov chaw tsim khoom siv kho qhov muag thiab tsim cov khoom lag luam kev sib txuas lus. Zoo siab txais tos koj tuaj xyuas pebnplooj ntawv khoom. Ua tsaug rau nyeem tsab xov xwm no.