Laser adopting inverted trapezoidal prism for reflection

Abstract

The invention discloses a laser adopting an inverted trapezoidal prism for reflection, relates to the technical field of the laser, and solves the problems of high threshold value and low conversion efficiency in the prior art. The laser comprises an output mirror, a first total reflection mirror, a gain medium, a pump source, the inverted trapezoidal prism and a second total reflection mirror; the first total reflection mirror, the second side surface of the inverted trapezoidal prism, the second total reflection mirror, the upper bottom surface of the inverted trapezoidal prism, the first side surface of the inverted trapezoidal prism and the output mirror form an optical resonant cavity; and the upper bottom surface of the inverted trapezoidal prism and the second total reflection mirror are arranged oppositely in a non-parallel arrangement mode. According to the structure of the optical resonant cavity, the inverted trapezoidal prism and the second total reflection mirror are utilized, so that information light can pass through the laser gain medium for multiple times, thereby improving the net gain in the laser resonant cavity, enlarging the difference value between the initial gain and the threshold value gain, lowering the laser threshold value and obviously improving the conversion efficiency of the pump laser; and in addition, the laser is simple in structure and low in cost and can be applied to the fields of a Q-switched laser and a mode-locking laser.

Description

technical field [0001] The invention relates to the technical field of lasers, in particular to a laser reflected by an inverted trapezoidal prism. Background technique [0002] With the rapid development of the laser field, low threshold and high conversion efficiency have become an important direction for the development of solid-state lasers. To achieve this goal, the only way to improve the laser output power and energy conversion efficiency is to optimize the pump source, pump mode, and laser gain medium (shape and doping concentration). Although the energy conversion efficiency of the laser can be improved by reducing the threshold of the laser resonator by these means, it will be severely restricted by the pump source level and the laser crystal material, and the energy loss rate is also very large. Contents of the invention [0003] In order to solve the problems of high pumping threshold and low laser conversion efficiency existing in existing lasers, the inventi...

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Problems solved by technology

[0003] In order to solve the problems of high pumping threshold and low laser conversion efficiency existing in existing lasers, the present invention provides a laser that uses inverted trapezoidal prism reflection to achieve low threshold output

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