公开(公告)号：US5553093A

公开(公告)日：1996-09-03

申请号：US467135

申请日：1995-06-05

申请人： Mailini Ramaswamy ,  James G. Fujimoto

发明人： Mailini Ramaswamy ,  James G. Fujimoto

IPC分类号： H01S3/08 ,  H01S3/081 ,  H01S3/098 ,  H01S3/16

CPC分类号： H01S3/1112 ,  H01S3/0943 ,  H01S3/08059 ,  H01S3/0811 ,  H01S3/0815 ,  H01S3/0816 ,  H01S3/1625

摘要： A laser resonant cavity defined by a set of reflective end elements positioned to together form a closed optical path, again medium positioned along the closed optical path, means for exciting the gain medium to produce a laser beam within the cavity, at least one focusing element positioned within the cavity in optical alignment with the gain medium, and a prism positioned as one of the end elements of the cavity and providing angular dispersion of the laser beam. The prism, end elements, gain medium, and focusing elements are positioned with respect to each other such that the resonant cavity supports a coexistence of several monochromatic laser modes, each mode having a distinct propagation axis. Propagation axes of modes having relatively longer wavelengths traverse more of the prism than propagation axes of modes having relatively shorter wavelengths, resulting in the addition of a negative component to the group velocity dispersion of the laser cavity. The invention provides group velocity dispersion compensation using one or more prismatic end elements without the need for any additional intracavity elements whose sole purpose is dispersion compensation.

摘要翻译： 由一组反射端元件限定的激光谐振腔，所述一组反射端元件一起形成闭合光路，并且沿闭合光路再次介质定位，用于激发增益介质以在腔内产生激光束的装置，至少一个聚焦元件 定位在腔内与增益介质光学对准，以及棱镜，其定位为空腔的一个端元件并提供激光束的角度色散。 棱镜，端元件，增益介质和聚焦元件相对于彼此定位，使得谐振腔支持若干单色激光模式的共存，每个模式具有不同的传播轴。 具有相对较长波长的模式的传播轴比具有相对更短波长的模式的传播轴越过棱镜，导致向激光腔的群速度色散添加负分量。 本发明使用一个或多个棱柱端元件提供组速度色散补偿，而不需要任何额外的腔内元件，其唯一目的是色散补偿。