Optical fiber alkali metal vapor laser

Abstract

The invention discloses an optical fiber alkali metal vapor laser which comprises a hollow-core photonic crystal fiber, a first single mode fiber, a second single mode fiber, a first Bragg grating etched on the first single mode fiber, a second Bragg grating etched on the second single mode fiber and a pump light source connected with the first single mode fiber. The hollow-core photonic crystal fiber is evenly filled with operation materials, pump light emitted by the pump light source acts on the operation materials through first single mode fiber in a coupling mode and generates stimulated seed lasers, the simulated seed lasers are oscillated and gained back and forth in a resonant cavity formed by the first Bragg grating and the second Bragg grating, and continuous lasers are output from the second single mode fiber. The optical fiber alkali metal vapor laser is low in collimation requirement on a light path, the integrated design of the resonant cavity and the operation materials is free from adjustment and maintenance and high in stability, the whole design is small in size, light in weight, good in compactedness, and beneficial for being moved, and the lasers output by a fiber end facer is beneficial for be in coupling with an external light path.

Description

technical field [0001] The invention belongs to the field of laser technology, and more specifically relates to an optical fiber alkali metal vapor laser. Background technique [0002] Optically pumped alkali metal vapor laser is a new type of laser device that has attracted great interest and developed rapidly in recent years. It has the advantages of both solid-state laser and gas laser, and is expected to obtain high-efficiency and high-power near-infrared laser output with high-quality beams. It has broad application prospects in laser cooling, directional energy transfer, material processing, and medical magnetic resonance imaging systems. Compared with other high-power lasers, the optically pumped alkali metal vapor laser also has the advantages of high quantum efficiency, good optical properties of the gain medium (gas), and narrow linewidth. [0003] Such as figure 1 As shown in , it is a schematic diagram of the three energy levels of diode optically pumped alkali...

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Problems solved by technology

[0007] Aiming at the defects of the prior art, the purpose of the present invention is to provide a fiber optic alkali metal vapor laser, which aims to solve the problem that the complex structure of the existing laser resonator cavity may lead to a slight change in the position of any optical device in the cavity, which may cause the laser output performance Deterioration problem

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