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355nm laser

A technology of lasers and main lasers, applied in the field of lasers, can solve problems affecting efficiency and crystal selection, maximum output power limitation, conversion efficiency limitation, etc.

Inactive Publication Date: 2020-05-05
RAINBOW SOURCE LASER RSLASER
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, due to the limited conversion efficiency of 532nm, the maximum output power of 355nm is also limited
Therefore, in the traditional scheme, the power contradiction between 1064nm and 532nm directly affects the efficiency and crystal selection of 355nm production

Method used

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  • 355nm laser
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Embodiment Construction

[0020] The following combination figure 2 A 355nm laser provided by the present invention is specifically described.

[0021] In the process of generating ultraviolet 355nm picosecond laser pulses, the different power density ratios of 1064nm fundamental frequency light and frequency doubled light 532nm have a great influence on the generation of 355nm. The output power of 532nm determines the final output power of 355nm, and the power of 1064nm determines the conversion rate from 532nm to 355nm, that is, the optimal crystal length corresponding to the highest conversion efficiency. Since the 532nm frequency doubled light is generated by frequency doubling of the 1064nm fundamental frequency light, it is impossible to simultaneously take into account the power of the fundamental frequency light 1064nm and the frequency doubled light 532nm in the traditional solution.

[0022] Such as figure 2 As shown, the present invention provides a kind of 355nm laser, comprises the fre...

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Abstract

The invention belongs to the technical field of laser, in particular to a 355nm laser. The 355nm laser is obtained through the following steps: firstly, carrying out frequency doubling on 1064nm fundamental frequency light by using a frequency doubling crystal to generate 532nm second harmonics; and then, making the 1064nm fundamental frequency light separated and amplified, and making the generated second harmonic 532nm laser and the amplified 1064nm fundamental frequency light subjected to frequency summation in a sum frequency crystal. According to the method, the conversion efficiency of 355 nm can be effectively improved, and efficient conversion output of 355 nm ultraviolet light can be achieved under the short crystal length; meanwhile, the influence of absorption and walk-off effects on 355 nm laser pulses can be reduced, the damage risk of the frequency doubling crystal is reduced, and purple picosecond 355 nm laser can be achieved under the condition of low-power fundamentalfrequency light incidence; and compared with a traditional scheme, the output power is improved by 40% or above, and the light beam quality can also be improved.

Description

technical field [0001] The invention belongs to the field of laser technology, in particular to a 355nm laser. Background technique [0002] Due to its short wavelength, high single-photon energy, relatively concentrated energy, and short action time, picosecond lasers in the ultraviolet band are widely used in high-precision mechanical parts processing, material detection, and biomedical technology, and have a large market Therefore, the development of highly stable and efficient ultraviolet picosecond laser light sources is an important direction that researchers are currently focusing on. [0003] At present, there is no corresponding laser gain crystal for laser in the ultraviolet band. Therefore, the method of obtaining laser output in the 355nm ultraviolet band is mainly to use nonlinear frequency conversion. In 1980, R.S.Craxton proposed the theory of high-efficiency third harmonic generation of Nd-glass laser; in 2001, N.Hodgson et al. used diode end-pumped Nd:YVO4...

Claims

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Application Information

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IPC IPC(8): H01S3/108H01S3/109
CPCH01S3/108H01S3/109
Inventor 王家赞张旭东储玉喜陈彬彬
Owner RAINBOW SOURCE LASER RSLASER