Patent ID: 11924955
Assignee: GIGAPHOTON INC.
Field: Medical technology (Instruments)
Classification: CPC H  G | IPC G  H

Claim 0:
1. An extreme ultraviolet light generation apparatus, comprising:
a target supply unit configured to output a droplet target into a chamber device;
a prepulse laser light irradiation system configured to irradiate the droplet target with prepulse laser light having linear polarization to generate a diffusion target;
a main pulse laser light irradiation system configured to irradiate the diffusion target with main pulse laser light to generate extreme ultraviolet light; and
an extreme ultraviolet light concentrating mirror configured to reflect the extreme ultraviolet light,
a cross section perpendicular to an optical axis of the main pulse laser light when being radiated to the diffusion target having a shape longer in a polarization direction of the prepulse laser light when being radiated to the droplet target than in directions other than the polarization direction,
wherein the main pulse laser light when being radiated to the diffusion target has linear polarization, and
a polarization direction of the main pulse laser light when being radiated to the diffusion target is perpendicular to a plane including a center axis of the extreme ultraviolet light traveling to the extreme ultraviolet light concentrating mirror and a center axis of the extreme ultraviolet light reflected by the extreme ultraviolet light concentrating mirror.