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    • 8. 发明申请
    • TUNABLE PULSE WIDTH LASER
    • TUNNABLE脉冲宽度激光器
    • WO2011146407A2
    • 2011-11-24
    • PCT/US2011/036681
    • 2011-05-16
    • FIANIUM, INC.ALMEIDA, PauloCLOWES, John, RedversDUPRIEZ, PascalGRUDININ, Anatoly, Borisovich
    • ALMEIDA, PauloCLOWES, John, RedversDUPRIEZ, PascalGRUDININ, Anatoly, Borisovich
    • H01S3/067H01S3/23H01S3/094H01S3/00H01S3/0941H01S3/16
    • H01S3/11H01S3/0057H01S3/06754H01S3/094003H01S3/0941H01S3/1112H01S3/1618H01S3/2383H01S2301/08
    • A method of tuning the time duration of laser output pulses, the method including spectrally dispersing optical pulses and further comprising providing an optical pulse having a time duration and a spectral bandwidth; spectrally dispersing the optical pulse so as to provide a selected change in the time duration of the pulse responsive to the spectral bandwidth of the pulse; outputting an optical output pulse having a first time duration that is responsive to the selected change in time duration; providing another optical pulse; changing the amount of spectral bandwidth of the another optical pulse to be different than that of the optical pulse or changing the amount of spectral dispersion so that spectrally dispersing the another optical pulse provides a change in time duration that is different than the selected change; and outputting another optical output pulse having a second time duration that is responsive to the different change in time duration, the second time duration of the another optical output pulse being different than the first time duration of the optical output pulse.
    • 一种调整激光输出脉冲的持续时间的方法,所述方法包括光谱分散光脉冲,并且还包括提供具有持续时间和光谱带宽的光脉冲; 光谱分散光脉冲,以响应脉冲的光谱带宽提供脉冲持续时间的选择的变化; 输出具有响应所选择的持续时间变化的第一持续时间的光输出脉冲; 提供另一个光脉冲; 将另一光脉冲的光谱带宽的量改变为不同于光脉冲的光谱带宽的量,或者改变光谱色散的量,使得光谱分散另一光脉冲提供不同于所选择的变化的持续时间的改变; 并且输出具有响应于持续时间的不同改变的第二持续时间的另一光输出脉冲,所述另一光输出脉冲的第二持续时间不同于所述光输出脉冲的第一持续时间。
    • 10. 发明申请
    • SEMICONDUCTOR DEVICE AND METHOD TO FABRICATE THEREOF
    • 半导体器件及其制造方法
    • WO2007071809A1
    • 2007-06-28
    • PCT/FI2005/050482
    • 2005-12-22
    • REFLEKRON OYOKHOTNIKOV, OlegGUINA, MirceaGRUDININ, Anatoly
    • OKHOTNIKOV, OlegGUINA, MirceaGRUDININ, Anatoly
    • H01S3/113G02F1/35H01S3/098
    • H01S3/1118G02F1/3523H01S3/067H01S3/113
    • The invention concerns a design of a semiconductor saturable absorber that offers a convenient and reliable way to decrease absorption recovery time. The design employs a multiple-layer heterostructure where at least one layer, called nonlinear layer, is used for absorbing a signal light. Additional layer(s) adjoin the nonlinear layer(s) and have a smaller band-gap then the nonlinear layer(s). The role of these narrow band-gap layers is to collect the carriers generated within the nonlinear layer(s) thus reducing the recovery time of absorption in nonlinear layers. We call these layers collectors. The control of the recovery time is achieved by means of the following measures a) band-gap engineering of the nonlinear layers such that the signal light will be absorbed in this layers that exhibit higher band-gap then surrounding layers and allow for an efficient sweep-out of the carriers towards surrounding layers; b) band-gap engineering of layers surrounding the nonlinear layers so that they will act as effective collectors for the carriers generated by absorption of the signal light in the nonlinear layers. The width of the absorber and collector layers is optimized to further enhance the nonlinearity and speed of the device The absorber can be used either in transmission or reflection mode. In the later configuration, the absorber is attached to a mirror that for example can be grown by molecular-beam-epitaxy monolithically to the absorbing layers, or it is obtained by deposition of dielectric or metallic layers.
    • 本发明涉及半导体可饱和吸收体的设计,其提供了一种方便可靠的方法来减少吸收恢复时间。 该设计采用多层异质结构,其中至少一层称为非线性层用于吸收信号光。 附加层与非线性层相邻并且具有较小的带隙,然后是非线性层。 这些窄带隙层的作用是收集在非线性层内产生的载流子,从而减少非线性层中的吸收恢复时间。 我们称这些层收集器。 通过以下措施来实现恢复时间的控制:a)非线性层的带隙工程,使得信号光将被吸收在该层中,其表现出更高的带隙然后围绕层并且允许有效的扫描 - 将载体转移到周围层; b)围绕非线性层的层的带隙工程,使得它们将用作通过吸收非线性层中的信号光产生的载流子的有效收集器。 吸收器和收集器层的宽度被优化以进一步增强装置的非线性和速度。吸收器可以用于透射或反射模式。 在后面的配置中,吸收器附着到例如可以通过分子束外延生长到反射镜的一个反射镜上,或者通过沉积电介质或金属层来获得。