Femtosecond laser oscillator with double-Z-shaped laser resonance cavity

Abstract

The invention discloses a Femtosecond laser oscillator with a double-Z-shaped laser resonance cavity. The Femtosecond laser oscillator comprises a pumping light source, a pumping coupling device and the Femtosecond laser resonance cavity, wherein the pumping coupling device is composed of a first lens and a second lens. The Femtosecond laser resonance cavity comprises a first concave mirror, a second concave mirror, a third concave mirror, a laser grain medium, a negative dispersion chirp mirror, a first saturable absorber and a coupling output mirror, and further comprises a fourth concave mirror and a second saturable absorber. The laser grain medium, the second concave mirror, the third concave mirror and the first saturable absorber form the first Z shape of the laser resonance cavity, and the negative dispersion chirp mirror, the coupling output mirror, the fourth concave mirror and the second saturable absorber form the second Z shape of the laser resonance cavity. The Femtosecond laser oscillator provides new design simpler in structure and easier to adjust for eliminating the influences of environment changes on the output stability of the Femtosecond laser oscillator and is low in cost.

Description

technical field [0001] The invention belongs to the field of femtosecond laser oscillators, in particular to a femtosecond laser oscillator with double zigzag laser resonators. Background technique [0002] Lasers used in industry, medical treatment and scientific research should have the characteristics of high stability and easy debugging. However, as the operating time of the laser increases or the environment changes, the output energy of the laser tends to decrease, and the output power is unstable. This is because the optical components in the laser resonator of the laser are displaced due to environmental changes such as temperature. These position deviations include the position movement of the optical components and the change of the pitch angle. In the femtosecond laser oscillator, since the laser cavity is long, generally about one meter or even longer, the position movement of the optical components in the laser cavity and the change of the pitch angle of the op...

AI Technical Summary

Problems solved by technology

This method can effectively reduce the influence of the environment on the output stability of the laser, but the accuracy of the detector system is very high, and the circuit system is very complicated and the cost is high

[0003] After the research, analysis and experiments of our research group, a femtosecond laser oscillator with a laser resonator with a special shape is proposed to overcome the small position shift and the The small offset caused by the change of the pitch angle of the optical element causes the output power of the laser to drop and stop the continuous mode locking, causing fatal damage to the laser and other defects, which is exactly the task of the present invention

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