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    • 1. 发明授权
    • Methods and apparatus for increasing wavelength tuning speed in broadband mode-locked ultrafast lasers
    • 在宽带锁模超快激光器中增加波长调谐速度的方法和装置
    • US08514898B1
    • 2013-08-20
    • US12875436
    • 2010-09-03
    • H. Yang Pang
    • H. Yang Pang
    • H01S3/10
    • H01S3/105H01S3/025H01S3/0811H01S3/0817H01S3/09415H01S3/1112
    • A wavelength-tunable, ultrafast laser includes a resonator having an optically-pumped gain-medium. The resonator includes a pair of group-delay-dispersion compensating prisms and a bandwidth limiting stop. Both prisms and stop are fixed in a predetermined position relative to one another. In one embodiment, a movable beam shifting reflector is placed between the prisms. The reflector shifts the dispersed beam with respect to the second prism and the stop. The stop is arranged, cooperative with the second prism, to select a pulse wavelength within the gain-bandwidth. Tuning of the selected pulse-wavelength is accomplished by translating the beam shifting reflector. Alternatively, a two-reflector arrangement may also select pulse-wavelengths, accomplished by a combination of rotation and translation of the two reflectors. Reflector motion is controlled relative to the positions of prisms and stop such that all selected lasing wavelengths result in minimized change in laser output pulse width as the laser wavelength is tuned.
    • 波长可调的超快激光器包括具有光泵浦增益介质的谐振器。 谐振器包括一对群延迟色散补偿棱镜和带宽限制停止。 棱镜和止动件都相对于彼此固定在预定位置。 在一个实施例中,可移动光束移动反射器被放置在棱镜之间。 反射器相对于第二棱镜和止挡器移动分散的光束。 该停止件与第二棱镜协调配置,以在增益带宽内选择脉冲波长。 所选择的脉冲波长的调谐通过平移光束移动反射器来实现。 或者,双反射器布置还可以选择通过两个反射器的旋转和平移的组合来实现的脉冲波长。 反射器运动相对于棱镜的位置被控制并且停止,使得当激光波长被调谐时,所有选择的激光波长导致激光输出脉冲宽度的最小化变化。