公开(公告)号：WO1995031023A1

公开(公告)日：1995-11-16

申请号：PCT/US1995005666

申请日：1995-05-05

Applicant: MASSACHUSETTS INSTITUTE OF TECHNOLOGY

Inventor： MASSACHUSETTS INSTITUTE OF TECHNOLOGY ,  RAMASWAMY, Malini ,  FUJIMOTO, James, G.

IPC: H01S03/098

CPC classification number: H01S3/1112 ,  H01S3/08059 ,  H01S3/0811 ,  H01S3/0815 ,  H01S3/0816 ,  H01S3/0943 ,  H01S3/1625

Abstract: A laser resonant cavity (10) defined by a set of reflective end elements (26) positioned to together form a closed optical path, a gain medium (12) positioned along the closed optical path, means (14) for exciting the gain medium to produce a laser beam within the cavity, at least one focusing element (24) positioned within the cavity in optical alignement with the gain medium, and a prism (26) 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.

Abstract translation: 由一组位于一起形成封闭光路的一组反射端元件（26）限定的激光谐振腔（10），沿封闭光路定位的增益介质（12），用于将增益介质激励到 在空腔内产生激光束，与增益介质光学对准地定位在腔体内的至少一个聚焦元件（24）和定位成腔体的一个端部元件的棱镜（26），并提供 激光束。 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。