Er: YAG single-frequency solid-state lase system

A solid-state laser and laser technology, applied in the field of lasers, can solve the problems of decreased output efficiency of the laser system, difficult to improve the output efficiency, large load of the temperature control system, etc., to achieve the effect of reducing thermal lens effect, reducing load, and reducing volume

A solid-state laser and laser technology, applied in the field of lasers, can solve the problems of decreased output efficiency of the laser system, difficult to improve the output efficiency, large load of the temperature control system, etc., to achieve the effect of reducing thermal lens effect, reducing load, and reducing volume

CN109149338AActive Publication Date: 2019-01-04BEIJING INSTITUTE OF TECHNOLOGYGY
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  • Er: YAG single-frequency solid-state lase system
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  • Er: YAG single-frequency solid-state lase system

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Embodiment Construction

[0015] The present invention will be described in detail below with reference to the accompanying drawings and examples.

[0016] The invention provides an Er:YAG single-frequency solid-state laser system, which includes a single-frequency continuous seed laser, a pulse slave laser and a programmable logic control circuit module.

[0017] Wherein, the single-frequency continuous seed laser is used to generate a single-frequency continuous seed laser, and the single-frequency continuous seed laser is injected into the pulse slave laser;

[0018] The pulse-driven laser includes more than two pumping sources, Er:YAG ceramic gain medium, resonant cavity, Q-switching device and piezoelectric ceramics with the same number of pumping sources; the Er:YAG ceramic gain medium doped The impurity concentration is 0.2at% to 0.5at%. The pulse slave laser is used to generate high-energy pulse output. After injection locking is performed by a single-frequency continuous laser, the optical fie...

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Abstract

The invention discloses a method and system for improving the energy and efficiency of an Er: YAG single-frequency solid-state laser, belonging to the technical field of laser. In order to reduce theinfluence of a thermal lens effect and upper energy level effect on laser output, Er: YAG crystal or ceramic with low doping concentration is the first choice of a gain medium. However, due to its lowdoping concentration, in order to achieve high-power and high-energy single-frequency laser output, it is usually necessary to inject a single-frequency seed laser into Q-switched pulsed slave laserand one or more amplifiers. The invention discloses a system for improving the energy and efficiency of an Er: YAG single-frequency solid-state laser, which can obtain a single-frequency laser outputwith large energy in a seed injection mode. The invention can not only solve the problem that the output efficiency of the high-energy single-frequency laser output is low due to adoption of a high-power pumping source and increase of the doping concentration of the gain medium, but also avoids the complex system caused by excessive amplification structure, thereby facilitating the realization ofsmall-sized large-energy single-frequency laser output.

Description

technical field [0001] The invention belongs to the field of laser technology, and relates to an Er:YAG single-frequency solid-state laser system, which realizes high-energy and high-efficiency laser output. Background technique [0002] The laser in the 1.6 μm band is eye-safe and is in the atmospheric window (1.5-1.8 μm and 2-2.4 μm), which can meet the requirements of lidar for higher atmospheric transmittance. From the perspective of device maturity, 1.6 μm belongs to the communication band, and various mature devices in the communication band can be directly used, including detectors with high responsivity and optical fiber devices that are easy to miniaturize, so the 1.6 μm lidar is easy to realize miniaturization . From the perspective of absorption of special gas molecules, CH4 gas has abundant absorption peaks in the 1.6 μm band, so 1.6 μm lasers can be used for CH4 differential absorption lidar to achieve fast and real-time detection of CH4 gas. 1.6μm is just in ...

Claims

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Application Information

Patent Timeline
04 Jan 2019
Publication
CN109149338A
IPC
H01S3/094; H01S3/16
CPC
H01S3/094038; H01S3/094049; H01S3/1608; H01S3/1643
Inventors
高春清; 史阳