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473nm electro-optic q-switch laser

A laser, electro-optical technology, applied in lasers, laser parts, phonon exciters, etc., to achieve the effect of improving power density, improving laser ranging accuracy, and narrowing pulse width

Active Publication Date: 2013-03-27
NANJING ZHONGKE SHENGUANG TECH
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  • Application Information

AI Technical Summary

Problems solved by technology

However, in the reports on pulsed 473nm lasers, passive Q-switching or acousto-optic Q-switching is mostly used, and there is no report on electro-optic Q-switched 473nm lasers.

Method used

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  • 473nm electro-optic q-switch laser

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Embodiment Construction

[0028] The following structural drawings further illustrate the specific implementation of the present invention, but should not limit the protection scope of the present invention.

[0029] Such as figure 1 As shown, the 473nm electro-optic Q-switched laser of the present invention is characterized in that its structure includes three parts: local oscillator level 1, amplification level 2 and extracavity frequency doubling 3:

[0030] The local oscillator stage 1 consists of a plano-convex rear cavity mirror 1-1, an electro-optic Q-switched crystal 1-2, a 1 / 4 wave plate 1-3, a Brewster polarizer 1-4, and a first laser diode pumping source 1-5, the first pump coupling system 1-6 and 1-7, the first beam splitter 1-8, the first gain medium 1-9, the second beam splitter 1-10, the second pump coupling system 1- 11 and 1-12, the second laser diode pumping source 1-13 and the plano-convex output mirror 1-14, the positional relationship of the above components is as follows:

[003...

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Abstract

A 473nm electro-optic q-switch laser comprises a local oscillator stage, an amplifier stage and an extracavity frequency doubling stage. A convex-concave cavity suitable for high-power laser output is adopted for a resonant cavity of the local oscillator stage, a double-end pulse pump is in bonding with a neodymium-doped yttrium aluminium garnet (Nd:YAG) crystal, an electro-optic q-switch generates 946nm fundamental frequency light, high-power 946nm laser is obtained through the amplifier stage, and 473nm blue light laser is generated by two lithium triborate (LBO) crystals placed in a cascade mode finally. The 473nm electro-optic q-switch laser has the advantages of being high in repetition frequency, narrow in pulse width, high in single pulse energy and good in light beam quality, and is suitable for underwater measurement of a high-precision laser radar.

Description

technical field [0001] The invention belongs to solid-state lasers, in particular to a 473nm electro-optic Q-switched laser Background technique [0002] Laser underwater communication has the advantages of strong anti-interference ability, high data transmission rate and good confidentiality. Seawater has scattering and absorption characteristics for laser light, among which the attenuation coefficient of blue light laser is the lowest, which is the window of seawater. Therefore, the 473nm blue laser is an important light source for laser underwater communication and detection. [0003] Using neodymium-doped yttrium aluminum garnet (Nd:YAG) as the gain medium, using 4 f 3 / 2 → 4 I 9 / 2 The quasi-three-level laser transition between them can obtain the fundamental frequency light with a wavelength of 946nm, and then through the nonlinear crystal frequency doubling technology, the blue light output of 473nm can be obtained. This is also the main method for producing blue ...

Claims

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Application Information

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IPC IPC(8): H01S3/115H01S3/109H01S3/0941H01S3/16
Inventor 陈卫标黄晶
Owner NANJING ZHONGKE SHENGUANG TECH
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