Full solid-state laser with optical fiber coupling double-end pump

Abstract

The invention relates to a laser, in particular to a full solid-state laser with an optical fiber coupling double-end pump, comprising a first pump source, a second pump source, a U-shaped type resonant cavity, a first gain medium and a second medium, wherein the U-shaped resonant cavity mainly consists of a plane total reflecting mirror, an output coupling mirror and two diphase color mirrors. The output coupling mirror and the plane total reflecting mirror are respectively arranged at the back of the first gain medium and the second medium, the first diphase color mirror and the second diphase color mirror are respectively arranged on a pump optical path of the first pump source and a pump optical path of the second pump source, and form a certain included angle of 90 degrees with the pump optical paths. The invention aims to design the full solid-state laser with the optical fiber coupling double-end pump which has large output power. Compared with the prior art, the invention has the advantages of better quality of light beams, favorable dynamic output stability of laser basic mode, better long-term work stability and the like.

Description

technical field [0001] The invention relates to a laser, in particular to a fiber-coupled double-end surface pumped all-solid-state laser. Background technique [0002] Semiconductor diode-pumped all-solid-state lasers are lasers that use laser diodes instead of flash lamps to pump solid-state laser gain media. As early as the 1960s, Nd:CaWO4 was pumped with GaAs diode radiation at a wavelength of 880nm to obtain a fluorescence output of 1064nm. Shortly after the GaAs laser diode (LD for short) was invented, people have recognized the advantages of using LD instead of flash lamp as a pump source with high efficiency, long life and compact structure. However, LD cannot meet the requirements of the pump source in terms of power and reliability, so there are few research reports. In the 1970s, there was no great breakthrough in the power of LD, but the research on semiconductor diode-pumped all-solid-state lasers has made significant progress in new chemical gain materials an...

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Problems solved by technology

[0004] Most end-pumped all-solid-state lasers use single-end pumping. Since the thermal stress generated by the thermal effect in the crystal cannot exceed the limit of the fracture stress of the laser crystal, the maximum pump power per unit area of ​​the gain medium cannot be very high. Therefore, the output laser power is relatively small, and the resulting thermal lens effect seriously affects the beam quality of the laser, and at the same time, the long-term operation stability will also be greatly affected, so that the end-pumped all-solid-state laser is limited in practical laser applications. certain restrictions

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