Compact and stable high-peak-power optical fiber output laser

Abstract

The invention discloses a compact and stable high-peak-power optical fiber output laser. The laser comprises a resonant cavity, pumping sources, a half-wave plate, a polarization beam splitter, a photoelectric detector, a coupling lens, an optical fiber and a collimating lens group, wherein the resonant cavity comprises a Porro prism, a passive Q-modulation crystal, a laser crystal and an output mirror; in the compact and stable high-peak-power optical fiber output laser, the Porro prism, the passive Q-modulation crystal, the laser crystal, the output mirror, the half-wave plate, the polarization beam splitter and the photoelectric detector are arranged in sequence in a light path direction of laser; the pumping sources are uniformly arranged in the center of the laser crystal by using stack arrays; the polarization beam splitter splits the laser into a branch light path perpendicular to the light path; the laser on the branch light path enters the optical fiber through the coupling lens; and the collimating lens group is arranged at the end of the branch light path. According to the compact and stable high-peak-power optical fiber output laser, the stability of a system is ensured, the risk of optical fiber damage is lowered, and the peak power of the optical fiber output laser is indirectly increased.

Description

technical field [0001] The invention relates to the technical field of fiber lasers, in particular to a compact and stable high peak power fiber output laser. Background technique [0002] Nowadays, pulsed lasers are widely used in many fields, but the peak power output by existing pulsed lasers is far from meeting the requirements of many important practical applications. For this problem, a solution is to use Q-switching technology. Q-switching technology, also known as Q-switching technology, is a technology that compresses the generally output continuous laser energy into extremely narrow pulses for emission, so that the peak power of the light source can be increased by several orders of magnitude. Today, Q-switching technology is an important means of obtaining megawatt-level peak power lasers. The methods for implementing Q-switching are mainly divided into active Q-switching and passive Q-switching. Passive Q-switching does not require high-voltage, fast electro-o...

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Problems solved by technology

[0003] However, the disadvantages of the existing passive Q-switching technology are: but because there is no external control, the accuracy of the performance is not high, the stability of the output beam is poor, and the output energy is lower than that of active Q-switched lasers

[0004] It is more difficult to debug the coupling of spatial light into multimode fiber. What is more critical is the design of the fiber fixture, such as end face protection, heat dissipation, stability, etc., as well as the stability of the spatial light itself, often due to the stability of the high peak power laser itself. Poor, especially the deformation generated on the mechanical structure, which leads to the reduction of the spatial optical coupling efficiency and damages the end face of the fiber, so that the stability of the laser product cannot be guaranteed

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