High-power optical isolation method based on transmission type optical grating

Abstract

The invention relates to a high-power optical isolation method based on a transmission type optical grating and belongs to the technical field of high power laser. According to the high-power optical isolation method, a laser source, a collimating lens and a half-wave plate are arranged orderly, and the laser source is optically coaxial with the collimating lens and the half-wave plate; the distance d between grating grooves is determined according to the first-level diffraction conditions of a diffraction equation, and then the diffraction transmission type optical grating is fabricated and arranged behind the half-wave plate to ensure that the optical axis penetrates through the center of the optical grating. A laser beam emitted by the laser source is incident into the optical grating after passing through the collimating lens and the half-wave plate. The optical grating is driven by piezoelectric ceramics to realize angle scanning on the optical grating and fine adjustment on the included angle between the optical grating and the optical axis, and therefore, the incident laser is output completely according to first-level diffraction and the optical isolation of the high-power laser is realized. The optical isolation of the high-power laser of 100000w at maximum is realized within the range of any wavelength by virtue of optical grating diffraction, and high isolation efficiency and simple adjustment are realized.

Description

technical field [0001] The invention relates to a high-power optical isolation method based on a transmission type grating, and belongs to the technical field of strong lasers. Background technique [0002] Optical isolators are more and more widely used in industry and scientific research. Usually optical isolation can be achieved according to the Faraday effect, such as figure 1 shown. However, this type of optical isolation has certain limitations on the wavelength and power of the beam. For high-power optical isolation and optical isolation of special wavelengths, there is currently no effective method. Contents of the invention [0003] The purpose of the present invention is to solve the problem of high-power optical isolation, and propose a high-power optical isolation method based on a transmission grating, and use the grating to realize high-power laser optical isolation. [0004] A high-power optical isolation method based on a transmission grating, specifical...

AI Technical Summary

Problems solved by technology

However, this type of optical isolation has certain limitations on the wavelength and power of the beam. For high-power optical isolation and optical isolation of special wavelengths, there is currently no effective method

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