Dielectric coatings for optimized low-loss saturable absorbers for high-power ultrafast laser-中国期刊网

摘要 Withthedevelopmentofhighpowerultrafastlaserpassivelymode-lockedbyasemiconductorsaturableabsorbermirror(SESAM),thedamagethresholdanddegenerationmechanismoftheSESAMbecomemoreandmoreimportant.OnewaytoreducethemaximumelectricfieldinsidetheactivepartoftheSESAMistheuseofadielectriccoatingonthetopofthesemiconductorstructure.WithFresnelformula,opticaltransfermatrix,andopticalthinfilmtheory,theelectricfielddistributionandreflectancespectrumcanbesimulated.WeintroducethedesignprinciplesofSESAMincludingthedependenceofreflectancespec-trumondielectricfunctionofabsorber,andinvestigatethedependencesoftheelectricfielddistribution,modulationdepth,reflectancespectrum,andtherelativevalueofincidentlightpoweratthetopquantumwellofSESAMonthenumberofSiO_2/Ta_2O_5layers.

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Dielectric coatings for optimized low-loss saturable absorbers for high-power ultrafast laser

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Dielectric coatings for optimized low-loss saturable absorbers for high-power ultrafast laser

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