Structure for increasing one-way gain through angular side pumping and implementation method

Abstract

The invention discloses a structure for increasing one-way gain by side pumping and an implementation method. A non-absorptive cladding material is bonded on the outer side of a gain medium, so that pumping light is reflected on an upper reflecting surface, a lower reflecting surface and side surfaces of a cladding; and the two side surfaces have a relative angle, the light travels back and forthalong the gain medium while being reflected by the side surfaces, so that the light can pass through the gain medium for multiple times, the absorption of the gain medium is increased, and the size ofthe gain medium is effectively reduced while the pumping light absorption frequency is increased. Because the pump light is reflected for multiple times and passes through the gain medium, the energydistribution of the pump light is more uniform, the cladding material has high thermal conductivity, the temperature gradient of the gain medium can be effectively reduced, the possibility of damaging a device is reduced, and the quality of an output light beam is improved.

Description

Technical field [0001] The invention relates to the application field of laser technology, in particular to a structure and an implementation method for side pumping to increase single-pass gain. The present invention designs a new type of side pumping structure, which realizes increasing the single-pass gain of the laser by bonding a cladding with cut corners, forming a brand-new pumping structure, belonging to the field of solid lasers. Background technique [0002] Q-switched pulsed solid-state lasers with narrow pulse width (several nanoseconds to tens of nanoseconds) and large pulse energy (tens of megajoules to 100 megajoules), because of their high peak power, compact structure, and moderate beam quality, It plays an important role in industrial processing, laser measurement and other fields. With the use of high-power semiconductor lasers as pump sources, the efficiency of solid-state lasers has been improved, and the beam quality has been improved. On this basis, due to...

AI Technical Summary

Problems solved by technology

[0003] There are some means and methods to increase the one-way gain. The most commonly used method is end pumping, but its absorption power decreases exponentially, and the length of the gain medium required to fully absorb the pump light is long, which cannot guarantee the small size and lightness of the laser system. Weight; at the same time, the distribution of pump light in the gain medium is extremely uneven, and the high-gain area is concentrated on the pump side, which affects the quality of the laser output beam; the high power density of the end face is easy to cause damage to the laser device

Images