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    • 1. 发明授权
    • Tapered laser rods as a means of minimizing the path length of trapped barrel mode rays
    • 锥形激光棒作为最小化被捕获的筒状模式射线的路径长度的手段
    • US06937636B1
    • 2005-08-30
    • US09651658
    • 2000-08-29
    • Raymond J. BeachEric C. HoneaStephen A. PayneIan MercerMichael D. Perry
    • Raymond J. BeachEric C. HoneaStephen A. PayneIan MercerMichael D. Perry
    • H01S3/06H01S3/0941
    • H01S3/0617H01S3/061H01S3/094057H01S3/09415
    • By tapering the diameter of a flanged barrel laser rod over its length, the maximum trapped path length of a barrel mode can be dramatically reduced, thereby reducing the ability of the trapped spontaneous emission to negatively impact laser performance through amplified spontaneous emission (ASE). Laser rods with polished barrels and flanged end caps have found increasing application in diode array end-pumped laser systems. The polished barrel of the rod serves to confine diode array pump light within the rod. In systems utilizing an end-pumping geometry and such polished barrel laser rods, the pump light that is introduced into one or both ends of the laser rod, is ducted down the length of the rod via the total internal reflections (TIRs) that occur when the light strikes the rod's barrel. A disadvantage of using polished barrel laser rods is that such rods are very susceptible to barrel mode paths that can trap spontaneous emission over long path lengths. This trapped spontaneous emission can then be amplified through stimulated emission resulting in a situation where the stored energy available to the desired lasing mode is effectively depleted, which then negatively impacts the laser's performance, a result that is effectively reduced by introducing a taper onto the laser rod.
    • 通过锥形圆柱形激光棒在其长度上的直径逐渐减小,筒状模式的最大捕获路径长度可以大大降低,从而降低被捕获的自发发射通过放大的自发发射(ASE)对激光性能产生负面影响的能力。 具有抛光桶和法兰端盖的激光棒在二极管阵列端泵浦激光系统中的应用越来越多。 棒的抛光筒用于将二极管阵列泵浦光限制在杆内。 在使用端部泵送几何形状的系统和抛光的筒状激光棒的系统中,被引入到激光棒的一端或两端的泵浦光通过全部内部反射(TIR)向下延伸, 光线撞到杆的桶。 使用抛光桶形激光棒的缺点是这样的棒非常容易受到桶状模式路径的影响,可以在长路径长度上捕获自发发射。 然后可以通过受激发射来扩大被捕获的自发发射,从而导致可用于期望的激光模式的存储能量被有效耗尽的情况,其然后对激光器的性能产生不利影响,通过在激光器上引入锥形来有效地减少 竿。