Multi-power solid laser structure

Abstract

The invention relates to the technical field of laser equipment, in particular to a multi-power solid laser structure which comprises an oscillation stage pumping module I, an oscillation stage pumping module II, a primary amplification pumping module, a secondary amplification pumping module and a coupling output mirror. An acousto-optic Q switch, a semi-reflecting mirror and a first mirror group are arranged between the front of the oscillation-stage pumping module II and the rear of the first-stage amplification pumping module; a second mirror group is arranged between the front of the second-stage amplification pumping module and the coupling output mirror; a third lens group is arranged on a light path between the rear part of the first-stage amplification pumping module and the first lens group, and a light path between the second lens group and the coupling output mirror; and a fourth lens group is arranged on a light path between the front part of the first-stage amplification pumping module and the rear part of the second-stage amplification pumping module, and a light path between the second lens group and the coupling output mirror. Multi-gear power output can be realized, optical fiber transmission can be realized, the optical fiber coupling efficiency is high, and the energy loss is low.

Description

technical field [0001] The invention relates to the technical field of laser equipment, in particular to a multi-power solid-state laser structure. Background technique [0002] Lasers are devices that can generate laser light, and the main types include solid-state lasers, gas lasers, fuel lasers, fiber lasers, excimer lasers, and free electron lasers. Lasers have the characteristics of high brightness, good monochromaticity and good directionality, and have different applications in various industries. [0003] The essential conditions for laser generation are population inversion and gain greater than loss, so the essential components in the device are the excitation (or pump) source and the working medium with metastable energy levels. Excitation is the excitation of the working medium to an excited state after absorbing external energy, creating conditions for realizing and maintaining the population inversion. The resonator can make the photons in the cavity have the...

AI Technical Summary

Problems solved by technology

In practical applications, low-power lasers still have use value, but low-power lasers are difficult to meet the needs of some occasions, and higher power modules need to be used to increase power

The existing technical solutions have high-power fiber lasers that can output different powers, but the high price makes some consumers discouraged

There are also plans to use a single high-power semiconductor pump module, which has certain limitations in crystal growth and heat dissipation, and has a complex structure and high cost

There are also multi-stage amplification modules in the existing scheme, but the output efficiency of the small-diameter fiber is low. The multi-stage amplification has thermal lens effect due to multiple pump modules, and the performance is not stable enough. When changing the current of the amplification stage, it can Realize power changes, but there are cases where the temperature of the amplification stage rises faster

And when the current is inconsistent, due to the existence of the thermal lens effect, efficient coupling cannot be performed

When Q-switching output, directly adjust the oscillation stage current to make the pulse width unstable, unable to achieve long-term work

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