公开(公告)号：US06377410B1

公开(公告)日：2002-04-23

申请号：US09410417

申请日：1999-10-01

申请人： Zhijiang Wang ,  Alice Z. Gheen ,  Ying Wang

发明人： Zhijiang Wang ,  Alice Z. Gheen ,  Ying Wang

IPC分类号： H01S3091

CPC分类号： G02B27/09 ,  H01S3/0941 ,  H01S5/005 ,  H01S5/4012 ,  H01S5/4031

摘要： Method and apparatus are disclosed for beam dividing and shaping, in which the beams from laser diode array are divided in a plurality of sections along the slow axis and the sections of beams are then recombined along their fast axis so that the Lagrange invariant of the resulting beam increased approximately by n-fold in fast axis and reduced approximately by n-fold in slow axis. With the inclusion of above apparatus in diode laser modules, the main objectives of constructing high-efficiency solid state lasers can be achieved. Thus, a high-efficiency diode-pumped solid state laser apparatus can be made, comprising a laser fiber, at least one laser diode array module, an imaging optical system, wherein said imaging optical system is disposed between said module and the aperture of said fiber and focuses the beam from said module onto the aperture of said laser fiber, and wherein said laser diode array module comprises at least one laser diode array, a collimating structure, a beam dividing/rearranging device and an optical relay system.

摘要翻译： 公开了用于光束分割和成形的方法和装置，其中来自激光二极管阵列的光束沿着慢轴被分割成多个部分，然后光束的部分沿其快轴重新组合，使得所得到的拉格朗日不变量 光束在快轴上大约增加了n倍，并且在慢轴上大约减少了n倍。 通过在二极管激光器模块中包含上述设备，可以实现构建高效率固态激光器的主要目标。 因此，可以制造高效二极管泵浦固态激光装置，其包括激光光纤，至少一个激光二极管阵列模块，成像光学系统，其中所述成像光学系统设置在所述模块与所述 光纤并将来自所述模块的光束聚焦到所述激光光纤的孔径上，并且其中所述激光二极管阵列模块包括至少一个激光二极管阵列，准直结构，光束分割/重排装置和光中继系统。

公开(公告)号：USRE40019E1

公开(公告)日：2008-01-22

申请号：US10211490

申请日：2002-08-01

申请人： Zhijiang Wang ,  Alice Z. Gheen ,  Ying Wang

发明人： Zhijiang Wang ,  Alice Z. Gheen ,  Ying Wang

IPC分类号： H01S3/30

CPC分类号： H01S3/094003 ,  H01S3/06708 ,  Y10S372/70

摘要： In the present invention, methods and apparatus for making efficient cladding pumping fiber lasers is disclosed. In particular, new fiber cladding geometry and new method of coupling pumping laser into an optical fiber are disclosed. Both aspects of the present invention will facilitate the realization of high-efficiency and high-power fiber lasers. In the present invention, cladding boundary geometry structures that can prevent the formation of local modes are disclosed. Besides the cladding geometry, methods for efficient coupling of diode lasers into a laser fiber for high power injection are also disclosed. Essentially, the new methods make it possible to transmit diode laser beams for a long distance with substantially the same brightness. In other words, with the methods and apparatus disclosed, a laser beam from a laser diode array with collimating structures can be transmitted for a long distance while the beam spot dimension including beam divergence can be kept substantially unchanged even if the beam from said array is not substantially collimated. With the method taught in the present invention, laser diode array modules can be formed with laser diode arrays (LDA) with collimating structures and relay systems. Because of the brightness conservation nature of the modules, when a plurality of such modules (such as 3, 9 or more than 200 pieces) are combined, the beams from the arrays can be efficiently coupled into an optical fiber. Thus the pumping laser coupling method can be used for the construction of high-efficiency and high-power fiber lasers. Thus, the fiber lasers of this invention may comprise of a fiber laser core doped with active species, a symmetry-broken inner cladding or a multiple-imaging inner cladding surrounding said core, a plurality of brightness substantially-conserved laser diode array module for coupling the beam from said laser diode array module into said inner cladding. An apparatus for a high efficiency cladding pumping fiber laser component includes a laser fiber having a core doped with active species disposed along an axis. A symmetry-broken inner cladding surrounds said core for transmitting optical energy from the inner cladding to said core. The symmetry-broken inner cladding has a substantially rectilinear cross-section with respect to the axis with at least two pair opposing sides. At least one side of each pair of each opposing sides is disposed in nonparallel relationship to its respective opposed side whereby the inner cladding has a symmetry-broken cross-section shape that minimizes local modes in the inner cladding.

公开(公告)号：US6101199A

公开(公告)日：2000-08-08

申请号：US225616

申请日：1999-01-05

申请人： Zhijiang Wang ,  Alice Z. Gheen ,  Ying Wang

发明人： Zhijiang Wang ,  Alice Z. Gheen ,  Ying Wang

IPC分类号： H01S3/067 ,  H01S3/094 ,  H01S3/30

CPC分类号： H01S3/094003 ,  H01S3/06708 ,  Y10S372/70

摘要： In the present invention, methods and apparatus for making efficient cladding pumping fiber lasers is disclosed. In particular, new fiber cladding geometry and new method of coupling pumping laser into an optical fiber are disclosed. Both aspects of the present invention will facilitate the realization of high-efficiency and high-power fiber lasers. In the present invention, cladding boundary geometry structures that can prevent the formation of local modes are disclosed. Besides the cladding geometry, methods for efficient coupling of diode lasers into a laser fiber for high power injection are also disclosed. Essentially, the new methods make it possible to transmit diode laser beams for a long distance with substantially the same brightness. In other words, with the methods and apparatus disclosed, a laser beam from a laser diode array with collimating structures can be transmitted for a long distance while the beam spot dimension including beam divergence can be kept substantially unchanged even if the beam from said array is not substantially collimated. With the method taught in the present invention, laser diode array modules can be formed with laser diode arrays (LDA) with collimating structures and relay systems. Because of the brightness conservation nature of the modules, when a plurality of such modules (such as 3, 9 or more than 200 pieces) are combined, the beams from the arrays can be efficiently coupled into an optical fiber. Thus the pumping laser coupling method can be used for the construction of high-efficiency and high-power fiber lasers. Thus, the fiber lasers of this invention may comprise of a fiber laser core doped with active species, a symmetry-broken inner cladding or a multiple-imaging inner cladding surrounding said core, a plurality of brightness substantially-conserved laser diode array module for coupling the beam from said laser diode array module into said inner cladding.

摘要翻译： 在本发明中，公开了制造高效包层泵浦光纤激光器的方法和装置。 特别地，公开了新的光纤覆层几何形状和将激光激光耦合到光纤中的新方法。 本发明的两个方面将有助于高效率和高功率光纤激光器的实现。 在本发明中，公开了可以防止形成局部模式的包层边界几何结构。 除了包层几何形状之外，还公开了将二极管激光器有效耦合到用于大功率注入的激光光纤中的方法。 本质上，新的方法使得可能以大致相同的亮度传输长距离的二极管激光束。 换句话说，利用所公开的方法和装置，来自具有准直结构的激光二极管阵列的激光束可以传输长距离，而包括光束发散的束斑尺寸可以保持基本上不变，即使来自所述阵列的光束是 没有实质准直。 利用本发明教导的方法，可以用具有准直结构和中继系统的激光二极管阵列（LDA）形成激光二极管阵列模块。 由于模块的亮度保持性，当多个这样的模块（例如3,9或多于200个）组合时，来自阵列的光束可以有效地耦合到光纤中。 因此，泵浦激光耦合方法可用于构建高效率高功率光纤激光器。 因此，本发明的光纤激光器可以包括掺杂有活性物质的光纤激光器芯，对称破裂的内包层或围绕所述芯的多成像内包层，多个亮度基本上保守的激光二极管阵列模块，用于耦合 所述激光二极管阵列模块的光束进入所述内包层。