Crystal frequency multiplier

A frequency doubler and crystal technology, applied in the field of lasers, can solve the problems of increasing the loss in the laser and the laser cavity, and the damage of the film layer, and achieve the effect of simplifying the coating process, improving the output power, and reducing the loss in the cavity

Active Publication Date: 2012-10-31
FUZHOU PHOTOP QPTICS CO LTD
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, for conventional film materials, the irradiation of ultraviolet laser will cause irreversible damage, which will seriously increase the intracavity loss of the laser, greatly increase the threshold of the laser, and reduce the working efficiency.
However, the Brewster angles of fundamental frequency light and double frequency light are quite different, making it difficult to achieve anti-reflection effects at the same time
The conventional treatment method is to use a special UV film material for coating to reduce the UV absorption to reduce the damage to the film layer, but the long-term UV laser may still cause damage to the film layer
This undoubtedly leads to serious restrictions on the working efficiency, working performance and working life of frequency-doubled ultraviolet lasers.

Method used

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Experimental program
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Effect test

Embodiment 1

[0019] Such as figure 2 , image 3 As shown in Example 1 of the present invention, the incident fundamental frequency light enters and exits the frequency-doubled crystal at the Brewster angle, and generates frequency-doubled light e light during this process, and the frequency-doubled light walks away and is polished Total reflection occurs on the side of the doubled frequency crystal, and then exits from the side of the crystal opposite to the total reflection surface at Brewster's angle without loss. similar to figure 1 As shown, the reflective surface of the frequency doubled light can be parallel to the optical track of the fundamental frequency light o, or present a certain angle. Since the frequency-doubled light will continue to be generated during the whole process of the base-frequency light passing through the frequency-doubled crystal, in order to avoid the ultraviolet frequency-doubled light generated near the base-frequency light output end as e-light from bei...

Embodiment 2

[0021] Such as Figure 4 As shown in Embodiment 2 of the present invention, the incident fundamental frequency light (including o light and e light at the same time) passes through the frequency doubling crystal coated with the fundamental frequency light antireflection film, and in this process generates frequency doubling light e light, the fundamental frequency The e-light λ1 of the light and the generated frequency-doubled light e-light λ2 are totally reflected on the side of the polished frequency-doubled crystal, and then the frequency-doubled light exits from the side of the crystal opposite to the total reflection surface at the Brewster angle without loss. similar to figure 1 As shown, the reflective surface of the frequency doubled light can be parallel to the optical track of the fundamental frequency light o, or present a certain angle. Since the frequency doubled light will continue to be generated during the whole process of the base frequency light passing thro...

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Abstract

The present invention discloses a crystal frequency multiplier. By adopting the Walk-Off effect of a nonlinear crystal, frequency multiplication ultraviolet light of e light produced in a nonlinear process is reflected by a side face and is transmitted out through another side face at a Brewster angle. Therefore, the output end of a crystal apparatus needs not to be coated with a membrane relatedto the frequency multiplication light, a membrane layer can be prevented from being damaged by light in the frequency multiplication ultraviolet light capable of damaging the membrane layer, and the coating process can be simplified.

Description

technical field [0001] The invention relates to the field of lasers, in particular to a crystal frequency doubler. Background technique [0002] Usually, in order to reduce the intracavity loss of the laser, reduce the threshold value, and increase the output power, we often need to coat the transparent surface of the laser crystal with an anti-reflection coating or use Brewster's angle to reduce the reflectivity. However, for conventional film materials, the irradiation of ultraviolet laser will cause irreversible damage, which will seriously increase the intracavity loss of the laser, greatly increase the threshold of the laser, and reduce the working efficiency. However, the Brewster angles of the fundamental frequency light and the double frequency light are quite different, making it difficult to achieve anti-reflection effects at the same time. The conventional treatment method is to use a special UV film material for coating to reduce the UV absorption to reduce the ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G02F1/35
Inventor 凌吉武吴砺任策林江铭
Owner FUZHOU PHOTOP QPTICS CO LTD
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