公开(公告)号：US20020154672A1

公开(公告)日：2002-10-24

申请号：US10099473

申请日：2002-03-15

Applicant: Yeda Research and Development Co. Ltd.

Inventor： Asher A. Friesem ,  Shmuel Blit ,  Ram Oron ,  Erez Hasman ,  Nir Davidson

IPC: H01S003/08

CPC classification number: H01S3/08036 ,  H01S3/08054 ,  H01S3/082 ,  H01S3/106 ,  H01S2301/20 ,  H01S2301/203

Abstract: An optical resonator supporting two sets of simultaneously co-existent oscillation modes (30 and 31), having polarizations orthogonal to each other. Mode control elements (28 and 29), such as apertures and phase elements, are introduced into the resonator to allow only preferred modes to exist. The placement and orientation of the sets are designed such that the high intensity zones of one set fall on the nodes or low intensity zones of the other set in an interlaced pattern. Thus, in a laser resonator, better utilization of the gain medium (24) is achieved and the beam quality and brightness over multimode lasing are improved. This configuration improves the performance of high Fresnel number resonators, in both pulsed and continuous lasers, for applications such as scribing, drilling, cutting, target designation and rangefinding. An application of the intra-cavity coherent summation of orthogonally polarized modes is described, whereby azimuthally or radially polarized beams may be obtained.

Abstract translation: 支持两组同时共存的振荡模式（30和31）的光学谐振器，具有彼此正交的极化。 将模式控制元件（28和29）（诸如孔径和相位元件）引入到谐振器中，以仅允许存在优选的模式。 这些组的放置和取向被设计成使得一组的高强度区域以交错图案落在另一组的节点或低强度区域上。 因此，在激光谐振器中，实现了增益介质（24）的更好的利用，并提高了多模激光的光束质量和亮度。 这种配置提高了脉冲和连续激光器中高菲涅尔数谐振器的性能，适用于诸如划线，钻孔，切割，目标指定和测距等应用。 描述了正交偏振模式的腔内相干求和的应用，由此可以获得方位角或径向偏振光束。

公开(公告)号：US20020141035A1

公开(公告)日：2002-10-03

申请号：US10021903

申请日：2001-12-13

Applicant: YEDA RESEARCH AND DEVELOPMENT CO. LTD.

Inventor： Nir Davidson ,  Nir Friedman ,  Ariel Kaplan

IPC: G02F001/11

CPC classification number: G02F1/33

Abstract: An acousto-optic scanning system, which relies on two counter propagating acoustic waves with the same frequency modulation. This scheme completely suppresses the linear frequency chirp, and thus enables the generation of fast non-linear scans and non-constant linear scans. By changing the phase between the modulating signals, this scheme also provides fast longitudinal scans of the focal point.

Abstract translation: 一种声光扫描系统，其依赖于具有相同频率调制的两个反传播声波。 该方案完全抑制线性频率啁啾，从而能够产生快速非线性扫描和非恒定线性扫描。 通过改变调制信号之间的相位，该方案还提供焦点的快速纵向扫描。