Laser beam combination device based on gradient-index electro-optical crystal and method thereof

A graded refractive index, electro-optic crystal technology, applied in lasers, laser parts, circuits, etc., can solve the problems of high average output power, difficult to achieve, and limited single-channel laser power improvement.

Inactive Publication Date: 2016-01-06
LASER FUSION RES CENT CHINA ACAD OF ENG PHYSICS
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Problems solved by technology

However, directly increasing the repetition rate of high-energy pulsed laser operation will cause serious thermal effects, which will affect the performance of the laser, and even cause the output pulse energy of the laser to drop or fail to work.
For high average power lasers, application requirements continuously put forward higher requirements for laser output power, but the single-channel laser power is limited, and it is difficult to achieve higher average output power

Method used

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  • Laser beam combination device based on gradient-index electro-optical crystal and method thereof
  • Laser beam combination device based on gradient-index electro-optical crystal and method thereof

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Embodiment 1

[0032] like figure 1 As shown, a laser beam combining device based on a graded-index electro-optic crystal includes: an electro-optic crystal 1 , a driving circuit 2 , three lasers, a synchronization machine 4 and a laser collimator 5 .

[0033] In the present invention, the electro-optic crystal 1 has Kerr effect and space charge effect, and the electro-optic crystal 1 is potassium niobate tantalate crystal. The Kerr effect refers to the inductive birefringence that is proportional to the square of the electric field, and the space charge is the residual charge that exists in the local area inside the semiconductor. Due to the existence of the Kerr effect, when a voltage is applied to the two parallel bottom surfaces of the electro-optic crystal 1, a uniform electric field will be generated inside the electro-optic crystal 1, and the refractive index of the electro-optic crystal 1 to the pulsed laser is different according to the applied voltage. There is a space charge in t...

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Abstract

The invention discloses a laser beam combination device based on a gradient-index electro-optical crystal and a method thereof. The laser beam combination device comprises the electro-optical crystal provided with a Kerr effect and a space charge effect; a drive circuit; at least two lasers, wherein output ports of the lasers are opposite to an incidence surface of the electro-optical crystal, emission positions of the lasers on an emission surface of the electro-optical crystal are the same point, the transmission directions of emitted pulse lasers are the same, and both the incidence surface and the emission surface are perpendicular to an electrode board; and a synchronous machine, wherein the drive circuit and all lasers are respectively connected with the synchronous machine. According to the invention, the Kerr effect and the space charge effect of the electro-optical crystal are utilized, and the output repetition frequency and mean power of the pulse lasers are improved on the premise that the pulse energy is not reduced.

Description

technical field [0001] The invention relates to the field of high-power lasers, in particular to a laser beam combining device and method based on graded-refractive-index electro-optic crystals. Background technique [0002] With the continuous development and maturity of laser technology, high-power lasers have become more and more widely used, which has profoundly affected the development of many industries. According to the working mode, high-power lasers are mainly divided into high peak power lasers (ie high-energy pulsed lasers) and high average power lasers. [0003] For high-energy pulsed lasers, lasers are required to have a certain repetition rate in various application fields. However, directly increasing the repetition rate of high-energy pulsed laser operation will produce serious thermal effects, which will affect the performance of the laser, and even cause the output pulse energy of the laser to decrease or fail to work. For high-average-power lasers, appli...

Claims

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Application Information

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IPC IPC(8): H01S3/107
Inventor 张永亮邓颖康民强罗韵薛海涛王少奇郑建刚张雄军李明中周丹丹董一方王振国张锐严雄伟王德恩郝欣胡东霞郑奎兴粟敬钦朱启华魏晓峰郑万国
Owner LASER FUSION RES CENT CHINA ACAD OF ENG PHYSICS
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