简介：Toobtainhighpower589-nmyellowlaser,aT-shapedthermal-insensitivecavityisdesigned.Theoptimalpowerratioof1064-and1319-nmbeamsisconsideredandthefundamentalspotsizedistributionfromtheoutputmirrortothetwolaserrodsarecalculatedandsimulated,respectively.Asaresult,a589-nmyellowlaserwiththeaverageoutputpowerof5.7Wisobtainedintheexperimentwhenthetotalpumpingpoweris695W.Theoptical-to-opticalconversionefficiencyfromthefundamentalwavestothesumfrequencygenerationisabout15.2%andthepulsewidthis150nsattherepetitionrateof18kHz.Theinstabilityoftheyellowlaserisalsomeasured,whichislessthan2%within3h.ThebeamqualityfactorsareM_x~2=4.96andM_v~2=5.08.
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