Optical fiber end-pumped laser

Abstract

The invention discloses an optical fiber end-pumped laser. The optical fiber end-pumped laser comprises a semiconductor pump source, a transmission module, a coupling module, a resonant cavity and semiconductor refrigeration modules, wherein the resonant cavity comprises laser crystals; the semiconductor refrigeration modules are respectively arranged on the semiconductor pump source and the laser crystals; pump light emitted by the semiconductor pump source is transmitted and homogenized by the transmission module and then enters the coupling module; the coupling module couples the pump light processed by the transmission module into the laser crystals in the resonant cavity; the laser crystals generate gain laser under excitation of the pump light; the gain laser is output after being processed by the resonant cavity. According to the invention, large-diameter energy fibers are adopted for transmitting and homogenizing high-peak power quasi-continuous pump light to enable the pump light to be extremely uniform; as high-energy end pumping is adopted, the efficiency is high and the power consumption is low; under the condition of ensuring high-peak power, high-energy and high-beam-quality output, a small divergence angle is guaranteed.

Description

technical field [0001] The invention relates to the technical field of all solid-state lasers, in particular to an optical fiber end-pumped laser. Background technique [0002] All-solid-state lasers (Diode Pumped solid state Laser, DPL for short) have the advantages of high efficiency, stable performance, good reliability, and long life, and the market demand is huge. All-solid-state laser technology is currently one of the few high-tech fields in my country that has overall advantages from material source to laser system integration. It has a good foundation for accelerated development in some fields and has become the main direction of laser technology development. . Due to its small size, light weight, and high efficiency, the DPL without water cooling and high peak power has developed rapidly in the fields of military defense, medical and health, and space radar, and its research has attracted great attention. [0003] According to the pumping method, non-water-cooled ...

AI Technical Summary

Problems solved by technology

End-pumped non-water-cooled lasers, in order to obtain a large energy output, use a light guide cone to couple the pump light into the laser crystal, but the light-emitting surface of the light guide cone must be close to the end face of the laser crystal, and the end face of the crystal is coated with a total reflection film. Full reflection mirror, not conducive to compressing the divergence angle

There are also vertical cavity surface emitting lasers (Vertical Cavity Surface Emitting Laser, referred to as VCSEL) as the end pump source. Because of the circularity of the emission spot, it is easy to integrate into a large-area array and can be directly focused on the crystal surface. After adding a rear mirror , the output beam quality is good and the divergence angle is small, but the output energy is only 18mJ

Images