photoelectric detection technology - eighth chapters（光电检测技术—第八章）

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1、Photoelectricdetectiontechnology-eighthchapters（光电检测技术—第八章）ThisarticleismadeupofsmallhatredandXinjiangPptdocumentsmayexperiencepoorbrowsingontheWAPside.ItisrecommendedthatyoufirstselectTXT,ordownloadthesourcefiletothelocalview.Theeighthchapteriscoherentdetectionmetho

2、dandsystemTheeighthchapteriscoherentdetectionmethodandsystemMasteringcontentCoherentdetectionsystemUnderstandingcontent-amethodofformingaphotoelectricdetectionsystemUnderstandingcontentTheuseofoptoelectronicsystemsTheeighthchapteriscoherentdetectionmethodandsystem8.1

3、thebasicprincipleofcoherentdetection8.2basicinterferencesystemandapplicationofthesamefrequencycoherentsignalphasemodulationanddetectionmethod8.4opticalheterodynedetectionmethodandsystem8.38.1basicprinciplesofcoherentdetectionCoherentdetectionistodetectandprocessthein

4、formationsignalcarriedbyopticalcarrierbyusingthecoherenceoflight.Itcanonlyberealizedbyusinglaserwithgoodcoherence.Intheory,coherentdetectioncanaccuratelydetecttheamplitude,frequency,andphaseoflightwaves.8.1basicprinciplesofcoherentdetectionHowever,duetothehighfrequen

5、cyoflightwaves,sofar,nophotoelectricdetectorcandirectlysensetheamplitude,phase,frequencyandpolarizationofthelightitself,butcanonlydetecttheintensityofthelight.Therefore,thesecharacteristicparametersoflightmusteventuallybeconvertedintolightintensityvariationsfordetect

6、ion.Thistransformationmustbedonethroughinterferometry.8.1basicprinciplesofcoherentdetection(1)opticalinterferometryandinterferometryLightinterferencereferstothesuperpositionoftwoormoreopticalwavesthatmaybecoherent,andtheintensityoftheircompositesignalsvariesregularly

7、withtimeorspace.Theroleofinterferometryistodetectthephaseorfrequencystatesoflightwaves,andtheirrelationswithtime,inthespatialdistributionoflightintensityorintheformoftemporalvariations.8.1basicprinciplesofcoherentdetectionTheintensityinformationoftheinterferencefring

8、escorrespondstothemeasuredcorrelationparameters.Themeasuredfringescanbeobtainedbycountingthefringesoranalyzingthefringepatterns.8.1