Hybrid amplifying laser with tunable high-energy ultra-short pulse width and repetition frequency

Abstract

The invention relates to a hybrid amplifying laser with tunable high-energy ultra-short pulse width and repetition frequency. The laser is characterized in that: (1) a semiconductor laser is controlled by a driving controller to emit two paths of control signals, one path is used for controlling the frequency of the semiconductor laser, and the other path is a frequency-divided signal, (2) the laser outputted by fiber coupling and a fiber pump source are combined into one fiber through a combiner to pass a gain fiber together, and (3) a selected pulse is amplified by a solid laser through a synchronous pumping mode. The combination of the three makes the pulse of the laser more stable, the anti-interference ability is strong, and the laser can run stably for a long time. At the same time,different types of gain fibers and different gain crystals can be used to achieve the output of narrow-pulse-width and low-repetition-rate lasers with different center wavelengths.

Description

technical field [0001] The invention relates to a high-energy ultra-short pulse width and a tunable hybrid amplification laser, and the high-energy laser belongs to the field of optics and nonlinear optics. [0002] technical background [0003] With the development of science and technology today, laser radar, laser ranging, laser early warning, and laser military reconnaissance have become the main means of modern military confrontation. In order to gain an advantage in war, lasers need to have shorter pulses and higher energy, so as to ensure that we can obtain the enemy's situation in the shortest time. Therefore, it is imperative to find high-energy short-pulse lasers. Lasers used in domestic military confrontation mainly include semiconductor lasers, fiber lasers and solid-state lasers, but they each have their own advantages and disadvantages. Semiconductor lasers have the advantages of small size, wide wavelength range coverage, and good pulse width tuning. However,...

AI Technical Summary

Problems solved by technology

However, solid-state lasers are greatly affected by temperature, and the laser cavity is prone to thermal lens effect, and the beam quality will deteriorate after long-term use, thus affecting the distance measurement effect

Moreover, the laser pulse width is wide and cannot be adjusted, and the small signal gain amplification effect is poor

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