The laser amplifier and laser resonance cavity with the multiple reflection folding light channel structure

Abstract

The invention belongs to laser amplifier and laser cavity field, and comprises exactly: two curved reflectors set opposite and obliquely to form non-telescopic non-confocal structure, the laser gain medium arranged between last two mirrors, and an optional cavity mirror away the light path. Wherein, the laser beam arrives the reflectors to multiple reflect and form a folded light path; after passing the gain medium for many times, the beam normal arrives one reflector and is reflected to return along original path; or, the beam oblique arrive at reflector, and passes medium only one time. This invention simplifies structure, and has well resistance to error or disturbance.

Description

technical field [0001] The invention belongs to the field of optics, in particular to a laser amplifier and laser resonance. Background technique [0002] Because the multi-reflection folded optical path structure has the advantages of reducing the optical length, increasing the path and coverage of the light beam passing through the medium, and being suitable for various materials, the folding method has been deeply studied and widely used. The optical path of multiple reflections was first used in the folded waveguide cavity of gas lasers in the laser field. Later, with the emergence of INNOSLAB's new solid-state lasers (see Optics Letters, Vol.23, No.18, 370-372), it also began to be used. in solid-state lasers. At present, there are three main schemes for various folded optical paths in laser amplifiers and laser resonators: [0003] Option 1, using a plane mirror structure, the reflection system is composed of two or more plane mirrors. The light beam is reflected mu...

AI Technical Summary

Problems solved by technology

Among them, some optical path structures are composed of 3, 4 or more optical lenses, which are complex in structure and more difficult to install and adjust.

[0010] In the third scheme, the optical lens to realize the folding of the optical path also needs to form a telescopic system (also known as a confocal structure). Due to the limitation of the structure, the laser can only be folded and reflected in the cavity one way, and the laser gain medium can pass through the laser gain medium one way, and the absorption is not sufficient. , the working efficiency of laser amplifier and laser resonator is low

Similarly, some optical path structures are composed of 3, 4 or more optical lenses, which are complex in structure and more difficult to install and adjust.

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