Novel highly-efficient high-power annular laser amplifier

Abstract

The invention discloses a novel highly-efficient high-power annular laser amplifier. The amplifier comprise four polarization reflection mirrors, four laser gain media, four lenses, two filtering hole stops, two electro-optical switches, one wavefront corrector and one reflection mirror. According to the invention, the amplifier is suitable for double-pulse direction transmission amplification and coaxial annular amplification of any transmission type gain medium, so energy storage and extraction efficiency of the laser gain medium is effectively increased and high-power laser output is acquired. Through the annular amplifier, annular amplification for any time can be achieved theoretically, quality of output light beams is effectively controlled and limitation on injected energy is loosened. Two space filters are adopted, so space modulation in the light beams can be effectively filtered. The image faces of the space filters are connected with object faces end to end, so diffraction effects of transmission in the cavity of the laser pulse can be restrained, and amplification with the high light beam quality is kept. The amplifier is of an annular structure, so the system structure is more compact.

Description

technical field [0001] The invention relates to a laser amplifier, in particular to a novel high-efficiency and high-power ring laser amplifier. Background technique [0002] Following the MOPA (Master Oscillator Power Amplifier) ​​technology, the new generation of laser technology represented by multi-pass amplification has greatly promoted the development of high-power laser devices, but there are still many problems. First, in order to fully extract the energy in the medium, there are clear requirements for the energy of the amplified injection pulse at all levels; second, in order to isolate ASE, the off-axis design is usually considered in multi-pass amplifying devices, which reduces the filling factor; third, the current In some devices, variable aperture, single pulse and one-way transmission amplification are usually used, and the energy storage and extraction efficiency of the amplifier is low; fourth, the whole system structure is complicated and lengthy, expensive...

AI Technical Summary

Problems solved by technology

First, in order to fully extract the energy in the medium, there are clear requirements for the energy of the amplified injection pulse at all levels; second, in order to isolate ASE, the off-axis design is usually considered in multi-pass amplifying devices, which reduces the filling factor; third, the current In some devices, variable caliber, single-pulse unidirectional transmission amplification is usually used, and the energy storage and extraction efficiency of the amplifier is low; fourth, the whole system structure is complex and lengthy, expensive, and maintenance costs are high

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