Femtosecond pulsed laser oscillator

Abstract

The femtosecond pulse laser oscillator includes a pump light generating module and a laser generating module, the laser generating module includes a first fiber collimator and a second fiber collimator in the resonator, and the second fiber collimator emits a light path The first 1 / 4 wave plate, the first 1 / 2 wave plate, the polarization beam splitter crystal, the second 1 / 4 wave plate, the first grating, the second grating and the reflection mirror are arranged in sequence, and the polarization beam splits in the resonant cavity A second 1 / 2 wave plate and a third fiber collimator are arranged in sequence on the 90° first reflection light path of the crystal, and a third 1 / 4 wave plate is arranged on the 90° second reflection light path of the polarization beam splitter crystal. The first optical fiber collimator is arranged at the 90° second reflection optical path terminal of the vibrating beam splitter crystal; the front end of the cylindrical copper tube of the first optical fiber collimator is positioned and fixed in the U-shaped groove of the first pillar, and the tail end of the cylindrical copper tube is positioned and fixed in the U-shaped groove of the first pillar. Position and fix the first semi-cylindrical notch on the middle plane. The femtosecond pulsed laser oscillator can realize large-scale industrial production and has stable mode locking.

Description

technical field [0001] The invention belongs to the field of laser technology, in particular to a femtosecond pulse laser oscillator. Background technique [0002] Ultrashort pulse lasers have been developed since the 1980s. From the dye lasers that first used the principle of collision pulse mode-locking to the advent of mode-locked Ti:sapphire femtosecond lasers, femtosecond lasers have gradually been used in scientific research and industrial production. Opened up a new era of industrial processing. Experiments have proved that the unique time characteristics of femtosecond laser determine that it is an ideal high-precision processing tool, which can not only realize the material preparation of various materials, but also perform three-dimensional processing and modification on the inside of the material. Femtosecond pulsed lasers can be used for high-precision micromachining of industrial materials such as metals, metal carbides, and silicon wafers. Compared with nanos...

AI Technical Summary

Problems solved by technology

Although the saturable absorber mode-locked laser has a simple structure, it is difficult to achieve fiber laser due to the poor product consistency of the saturable absorbing medium (such as semiconductor saturable absorbing mirror, graphene, carbon nanotubes) and the disadvantages of easy photoinduced damage. Ultra-large-scale production of light sources

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