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1、OpticsandLasersinEngineering39(2003)309–315DevelopmentofacwCo:MgF2laserA.DiLietoDipartimentodiFisicadell’Universita,IstitutoNazionalediFisicadellaMateria-SezionediPisa,"ViaBuonarroti2,I-56127Pisa,ItalyReceived8January2001;receivedinrevisedform8May2001;accepted9May2001Abstrac
2、tTheresultsobtainedinthedevelopmentofacryogeniccwCo:MgF2laser,realizedattheDipartimentodiFisicaoftheUniversitadiPisaarepresented.Thelasercanbetuned"continuouslyintherangebetween1.6and2.1mm,withatypicaloutputpowerof1–2W.ApreliminaryapplicationtothespectroscopyofaTm:YLFdopedcr
3、ystalisreportedbyusingaphotoacousticapparatus.r2002ElsevierScienceLtd.Allrightsreserved.Keywords:cwCo:MgF2laser;Photoacousticapparatus1.IntroductionTherequestforcwtunablelasersoperatinginthenearinfraredisstillincreasing,withpreferenceforsourcesbasedonsolidstatematerials.Inth
4、ewavelengthregionbetween1.6and2.1mm,itisnowpossibletofindafewsourcesbasedonrare-earth-dopedcrystals[1],butallofthemshowaverynarrowtuningrange.Adifferentapproachhasbeenattemptedinthepastbyusingcrystalsdopedwithtransition-metalions,characterizedbyamuchbroaderemissionrange,butwea
5、kerintensity.Thischaracteristichaspreventedthediffusionofcwcommerciallasersoperatinginthiswavelengthregion,unliketheenormoussuccessoftheTi:Sapphirelaser,whichisasourcewithasimilarstructureatshorterwavelength.Actually,theonlyknownandwell-documentedworksinthisfieldarethosepresen
6、tedinthepastbyMoulton,especiallyitspioneeringworkdated1985[2].Inthepresentwork,IdescribethedevelopmentofaCo:MgF2laser,constructedaccordingtotheschemesof[2],withsomemodificationsandimprovementstoadaptittotherequirementsofourE-mailaddress:dilieto@df.unipi.it(A.DiLieto).0143-816
7、6/03/$-seefrontmatterr2002ElsevierScienceLtd.Allrightsreserved.PII:S0143-8166(01)00127-0310A.DiLieto/OpticsandLasersinEngineering39(2003)309–315laboratory.Theresultisacwpowerfulsource,continuouslytunableintheregionbetween1.6and2.1mm,withatypicaloutputpowerof1–2W.2.Experiment
8、alapparatusTheCo:MgF2laserisaverypeculiarsourceforthemid-infrared:inthe2+4c
