公开(公告)号：US3641343A

公开(公告)日：1972-02-08

申请号：US3641343D

申请日：1970-09-08

Applicant: PHILIPPE LANGER

Inventor： LANGER PHILIPPE

IPC: H01S3/00 ,  G01J11/00 ,  G02F1/21 ,  G04F13/02 ,  G01N21/16 ,  G01N23/00

CPC classification number: G01J11/00 ,  G04F13/026

Abstract: A method of and apparatus for the measurement of duration of ultrashort pulses of monochromatic polarized light, such as laser pulses. The method comprises splitting the polarized light beam into two identical beams; causing the two split beams to travel through the same optical path and to interfere on a photocathode comprising a thin metal layer disposed in vacuo, the energy required to detach the electrons from the layer being greater than the energy of the incident light photons; producing an image of the multiphotonic interaction zone obtained on the photocathode by means of electrons detached from the photocathode by a multiphotonic process in response to photons in coincidence from the two split light pulse therefrom. The apparatus is appropriate for carrying out the method.

Abstract translation: 用于测量诸如激光脉冲的单色偏振光的超短脉冲持续时间的方法和装置。 该方法包括将偏振光束分成两个相同的光束; 使得两个分离光束穿过相同的光路并且干涉包含真空设置的薄金属层的光电阴极，使电子从该层分离的能量大于入射光子的能量所需的能量; 产生通过多光子过程从光电阴极分离的电子在光电阴极上获得的多光子相互作用区域的图像，响应于来自其的两个分裂光脉冲的光子。 该装置适用于执行该方法。