利用周期极化ktp晶体外腔倍频铯原子d2线激光

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1、万方数据discusstheimportantfactor--phase-matchingandintroduceusual帆okindsofphase．matching--Critical-Phase—MatchingandNoncritical-Phase。Matchingandeventuallyanewkindofphase。matchingtechnique--Quasi．Phase．Matchingandcomparethesethreekindsofphasematchingtechniques．(，2、)WedisCUSStheconfigurationoffrequenc

2、ydoubler．Whenfrequencydoublerisabow．tietyperingcavity,thetotalroundtdpcavitylengtllis516mm．Thedistancebetweenthetwocurvedmirrorsis58mlnandthewaistradiusbetweenthistwocurvedmirrorsis20，tm．Inordertoenhancethe丘equencydoublingconversionefficiency，weoptimizetheconfigurationO士盘equency．doubleraccordingto

3、spatial“mode-matching”and“opticalimpedance．matching’’．Bysendingthebeamintothecrystal(single’pass)wemeasuredthenonlinearconversioncoefficient‰isabout1．41％W叫withcrystallengthof10mmatthephase—matchingtemperature·TheintracavitylinearlossLt。is2．65％．Finally,wechoosethemodematchinglenswithfocallengthof80

4、ram．Thetransmissionofinputcoupleris7．6％．Basedontheexperimentalparameters，wepredicttheexperimentalresultstheoretically．f3、)WeintroduceOurexperimentalsystemindetails，includingtheset-upoftheexperiment，theproceduresandtheresults．Atfirst，frequencydoublerisabow．tietyperingcavityandthenonlinearcrystalisP

5、PK丁P．Weusedadiode1aser(SDL．TC40)asthepumpsource．Thewavelengthofthediode1aserisattheCsD2transition(852．356nm)whichwascheckedbyCsglasscellandwavelengthmeter．Themaximaloutputpowerisabout140mW．Wemeasuredthemaximalpowerofbluelightat426nlTt，whichis54．4mWandtheconversionefficiencyisabout40％whenthepumppow

6、eris136·4mW．Thisresultisquiteagreeablewiththetheory．Thebestphasematchingtemperaturemeasuredis318．3K(correspondingto4．31Kf2)at852·356nm，bvafinetemperaturecontroller．ThisCWbluelight(426．178nm)cannotonlybeusedinatomicphysics，quantumoptics，butalsocanbeusedastnepumpsourceofOPOtogeneratethequantumstatea

7、ttheCsD2transition·IV万方数据(4)Basedonourexperimentalsystem，wediscussthepossibilityofdesigningthe丹equencydoublerbythestanding-wavecavity．Themotivationisthatthebow—tiety’peringcavity,duetofourmirrors，mayhavesomedrawb