Reflection type sheet laser amplifier of ridge structure

Abstract

The invention discloses a reflection type sheet laser amplifier of a ridge structure. The reflection type sheet laser amplifier of the ridge structure comprises a window, ridge structure sheet gain media, diode laser arrays, cushion blocks, a cooling and radiating device and a reflector, wherein m pairs of ridge structure sheet gain media are arranged on the inner walls of two cooling and radiating slabs of the cooling and radiating device in a vertically staggered mode, the two cooling and radiating slabs of the cooling and radiating device are vertically parallel to each other, m is a positive integer, the window is arranged at one ends of the cooling and radiating slabs, the reflector is arranged at the other ends of the cooling and radiating slabs, the plane where the window is located is parallel to the plane where the reflector is located, each ridge structure sheet gain medium is pumped by a corresponding diode laser array. According to the reflection type sheet laser amplifier of the ridge structure, two-pass four-time amplification of injected pulses can be achieved by the ridge structure sheet gain media without coating, low incidence loss of the surfaces of the gain media is guaranteed, and a series of problems caused by coating of the surfaces of the gain media are avoided. The reflection type sheet laser amplifier of the ridge structure has the advantages that quality of output light beams is good, and efficiency is high.

Description

technical field [0001] The invention relates to a laser system, in particular to a ridge-structure flake reflective laser amplifier. Background technique [0002] High-power solid-state laser amplification systems usually use multi-pass amplification and thin slice technology to improve the overall working efficiency of the system. Compared with the single-pass main oscillator power amplifier structure (also known as MOPA structure), multi-pass amplification is beneficial to improve energy extraction efficiency, thereby improving the energy conversion efficiency of the system; the chip structure makes the gain medium have a high TEM 00 The filling rate and low thermal effect are beneficial to reduce the thermal lens effect and thermal-induced stress birefringence effect of the medium, and improve the output beam quality. The working principle of the high-power solid-state laser amplification system using multi-pass amplification and thin slice technology is mostly based on ...

AI Technical Summary

Problems solved by technology

However, both structures have certain limitations

The Brewster angle transmission structure with multiple crystals connected in series has low energy extraction efficiency and compact structure, and this operation mode has high requirements for crystal cooling; the active mirror structure needs to be coated on the surface of the gain medium , there are problems of water erosion of the film layer in the water cooling mode and the problem of the laser damage resistance of the film layer, which will limit its further application in high-power solid-state laser amplification systems

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