Double-mirror ring travelling-wave laser

Abstract

The present invention relates to a structure design of double reflector ring travelling-wave laser, the resonant cavity of said laser is only formed from two reflectors, and the reflector near to thepump light source is made up by plating medium film on the laser crystal, and the laser beam produced when the distance between two reflactors is a specific value can be advanced along the stereoscopic circular light path in the cavity body so as to form the ring travelling-wave laser.

Description

technical field [0001] The invention relates to a laser, in particular to a structural design of a double-mirror circular traveling wave laser, and belongs to the technical field of lasers. Background technique [0002] Intracavity frequency doubling is currently the most common method for all-solid-state solid-state lasers to generate frequency-doubled light. This type of laser device has high conversion efficiency and is easy to use. But its disadvantage is that there is a "green light noise problem" that has attracted much attention, that is, when the laser operates continuously in multiple longitudinal modes, due to the joint action of two nonlinear processes, the inter-mode sum-frequency generation and the cross-saturation effect, the output The laser intensity fluctuates greatly and irregularly with time, showing the characteristics of chaotic motion. The random fluctuation of the intracavity doubled output power limits the application of this type of laser and needs...

AI Technical Summary

Problems solved by technology

They have important applications in the fields of precision measurement and laser spectroscopy, but because they use multi-faceted independent mirrors, the structure is complex, the work is unstable, and the price is high

[0003] Furthermore, in the mode-locked lasers with important applications in the existing ultrafast optics and other fields, since the frequency of the modulator is only one hundred megahertz, it is necessary to use a very long laser resonator (such as a mode-locked laser with a frequency of 150MHz , the length of its resonant cavity is about 1 meter), so that the length of this type of laser is too large, the work is unstable, and it is inconvenient to use;

[0004] In addition, LD longitudinally pumped all-solid-state lasers have high efficiency and good beam quality, but their output power is limited by factors such as thermal lens effects, so they can only be used to make lasers with low and medium power

[0005] These disadvantages of the above mentioned lasers are mainly the result of their use of multi-mirror resonators, long resonators and single point pumping

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