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A dual-wavelength tunable solid-state laser and its application

A solid-state laser and solid-state laser technology, applied in the field of lasers, can solve problems such as limitations of laser pumping methods, inconvenient applications, and limited applications, and achieve the effects of large tuning range, stable performance, and high energy

Active Publication Date: 2017-04-19
SHANDONG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This method realizes tunable dual-wavelength laser output, but the output laser is randomly polarized light, which greatly limits its application
Due to the Littrow structure of the grating used and the limitations of the fiber itself, this method is not suitable for high-energy laser operation
In addition, the Littrow grating structure has its inherent disadvantages as a tuning element. For example, if it is used as the output end of a laser resonator, the direction of the output laser will change with the tuning wavelength, which is extremely inconvenient to use; and if it is used as a laser The all-inverted end of the resonator is used, and the laser pumping method is limited

Method used

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  • A dual-wavelength tunable solid-state laser and its application
  • A dual-wavelength tunable solid-state laser and its application
  • A dual-wavelength tunable solid-state laser and its application

Examples

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Effect test

Embodiment 1

[0038] like Image 6 shown.

[0039] A dual-wavelength tunable solid-state laser, including a pump source and a resonant cavity, the resonant cavity including a rear cavity mirror 1, a solid-state laser medium 3, a polarizer 4, a first Littman grating structure and a second Littman grating structure;

[0040] A solid laser medium 3 that emits laser light, and a polarizer 4 that is sequentially arranged along the laser emission direction; the laser is divided into a horizontal polarization direction and a vertical polarization direction after being passed through the polarizer 4, and a first beam is arranged in the horizontal polarization direction. Tieman grating structure; a second Litman grating structure is arranged in the vertical polarization direction;

[0041] The first Littmann grating structure includes a first blazed grating 5 and a first tuning mirror 6: the horizontally polarized light emitted by the polarizer 4 is diffracted by the first blazed grating 5, and th...

Embodiment 2

[0061] like figure 1 shown.

[0062] A dual-wavelength tunable solid-state laser as described in Embodiment 1, the difference is that the pumping source is a flash lamp pumping system; the pumping method is side pumping.

Embodiment 3

[0064] like figure 2 shown.

[0065] A dual-wavelength tunable solid-state laser as described in Embodiment 2, the difference is that a Q-switching device is also provided between the rear cavity mirror 1 and the solid-state laser medium 3; the Q-switching device is an electro-optic Q-switching device , Acousto-optic Q-switching device or saturable absorber passive Q-switching device. The acousto-optic Q-switching device is composed of a radio frequency input device and a Q-switching crystal. Both ends of the Q-switching crystal are coated with an anti-reflection film with a transmittance greater than 99%. The modulation frequency is 1Hz-100KHz, and the modulation frequency is changed by inputting radio frequency waves. The density of the Q crystal is used to achieve the purpose of periodically changing the threshold of the laser resonator, which acts as a Q-switching switch; the electro-optic Q-switching device is composed of an electro-optic crystal and a driving power sup...

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PUM

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Abstract

The invention relates to a dual-wavelength tunable solid laser comprising a pumping source and a resonant cavity. The resonant cavity comprises a rear cavity lens, a solid laser medium, a polarizer, a first Littmann grating structure and a second Littmann grating structure, laser light is emitted in a horizontal polarization direction and a vertical polarization direction after passing the polarizer, the first Littmann grating structure is arranged in the horizontal polarization direction, and a half-wave plate and the second Littmann grating structure are arranged in the vertical polarization direction. Two wavelengths of the laser can be tuned independently, and the laser has the advantages of high power, high energy, large tuning range, unchanging of the laser output direction with the wavelength, stable performance and the like.

Description

technical field [0001] The invention relates to a dual-wavelength tunable solid-state laser and its application, belonging to the technical field of lasers. Background technique [0002] In recent years, dual-wavelength lasers have become a research hotspot due to their more and more applications in the fields of laser ranging, holographic interferometry, laser medical treatment and nonlinear frequency conversion. On the other hand, many applications place special demands on the performance of dual-wavelength lasers. Especially in the fields of spectral measurement, optical sensing and tunable terahertz sources, it is required that the two lasers of the dual-wavelength laser can be independently tuned within a certain wavelength range. For example, frequency difference between two lasers with similar wavelengths is an effective way to generate terahertz waves. In order to generate tunable terahertz waves that can cover the range of 0.3THz-3THz, the two lasers for frequency...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01S3/105H01S3/11H01S3/16
Inventor 刘兆军张行愚丛振华门少杰张飒飒刘杨饶瀚
Owner SHANDONG UNIV