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    • 3. 发明申请
    • Broadband mode-locked laser oscillator and oscillation method thereof
    • 宽带锁模激光振荡器及其振荡方法
    • US20050220154A1
    • 2005-10-06
    • US11086757
    • 2005-03-23
    • Sadao UemuraKenji Torizuka
    • Sadao UemuraKenji Torizuka
    • H01S3/098H01S3/16
    • H01S3/1112H01S3/0805H01S3/1118H01S3/1618H01S3/1643H01S2301/08
    • A laser oscillator to further shorten a pulse width is provided by enabling broadband mode-locking even while using a laser medium having a precipitous fluorescence peak. A resonator has two concave mirrors and four chirped mirrors, and cavity-dispersion is compensated by these chirped mirrors. A semiconductor laser output is focused through a first concave mirror onto the laser medium to produce a gain medium in the resonator, whereby a laser oscillation is realized. While setting a target value in layer thickness design of dielectric multilayer of the chirped mirrors so as to slightly lower reflectivity at a fluorescence peak wavelength of the laser medium, fitting is redone, whereby reflectivity is slightly changed without greatly changing group-delay dispersion. In this procedure, reflectivity is reduced in any one or some of the chirped mirrors to average the gain.
    • 即使在使用具有陡峭荧光峰值的激光介质的情况下,通过实现宽带锁定模式来提供进一步缩短脉冲宽度的激光振荡器。 谐振器具有两个凹面镜和四个啁啾反射镜,腔体色散由这些啁啾反射镜补偿。 半导体激光输出通过第一凹面镜聚焦到激光介质上,以在谐振器中产生增益介质,从而实现激光振荡。 在设置啁啾反射镜的电介质多层的层厚设计中的目标值,以便在激光介质的荧光峰值波长处略微降低反射率,重新配合,由此反射率略有变化,而不会显着改变组延迟色散。 在这个过程中,任何一个或一些啁啾反射镜的反射率都降低,以平均增益。