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A low voltage driven electro-optic Q-switching switch based on tetragonal potassium tantalum niobate crystal

A technology of potassium tantalum niobate and tetragonal phase is applied in the field of low-voltage driving electro-optical Q-switching devices, which can solve problems such as no practical value, and achieve the effects of compact structure, stable structure and simple design.

Active Publication Date: 2019-09-20
山东山科智晶光电科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, traditional thinking shows that the electro-optic effect of the 4mm point group of the tetragonal system has no practical value: the linear electro-optic crystal of the 4mm point group of the tetragonal system, the crystal phase difference (T) and the electro-optic coefficient (γ 51 ) is proportional to the square of the product of the electric field strength (E) (the crystal length and the refractive index are constant), and the linear electro-optic coefficient is generally tens of Pm / V through analysis, even if the electric field strength E is large, the influence on the phase difference will be small

Method used

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  • A low voltage driven electro-optic Q-switching switch based on tetragonal potassium tantalum niobate crystal
  • A low voltage driven electro-optic Q-switching switch based on tetragonal potassium tantalum niobate crystal
  • A low voltage driven electro-optic Q-switching switch based on tetragonal potassium tantalum niobate crystal

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Embodiment 1

[0025] Embodiment 1: An electro-optic switch driven by low voltage based on tetragonal phase potassium tantalum niobate. An electro-optic switch, the structure is as follows figure 1 As shown, 1 is a polarizer, 2 is a KTN crystal device with a metal film plated on the surface, and 3 is a quarter-wave plate and a metal layer electrode 4 on the surface of the KTN crystal. Polarizer 1 is a device for generating polarization and detection. The optical axis of quarter-wave plate 3 is at a 45-degree angle to the polarization direction of the laser light passing through the potassium tantalum niobate (KTN) crystal device. The quarter-wave plate is used The phase difference between ordinary light and extraordinary light produced by the laser wavelength is π / 2. The light-transmitting surface of the KTN crystal device 2 coated with a metal film on the surface is a square whose sides are parallel to the X and Y axes of the potassium tantalum niobate (KTN) crystal, with a side length of 3...

Embodiment 2

[0026] Embodiment 2: As described in Embodiment 1, the difference is that the light-transmitting surface of the KTN crystal device 2 coated with a metal film on the surface is a square whose sides are parallel to the X and Y axes of the potassium tantalum niobate (KTN) crystal, The side length is 3 mm, the light transmission direction is along the Z-axis of the potassium tantalum niobate (KTN) crystal, and the length is 6 mm.

Embodiment 3

[0027] Embodiment 3: As described in Embodiment 1, the difference is that the light-transmitting surface of the KTN crystal device 2 coated with a metal film on the surface is a square whose sides are parallel to the X and Y axes of the potassium tantalum niobate (KTN) crystal, The side length is 3 mm, the light transmission direction is along the Z-axis of the potassium tantalum niobate (KTN) crystal, and the length is 9 mm.

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Abstract

The invention discloses an electro-optical Q-switch based on tetragonal phase potassium citrate (KTa<1-x>NbxO3, 0.4<x<0.7, KTN for short), and belongs to the field of laser devices. The electro-optical Q-switch consists of a polarizing film, a potassium niobate crystal, and a quarter-wave plate. The Nb component of the potassium citrate (KTN) crystal is between 0.4 and 0.7, and belongs to a tetragonal phase structure. A KTN crystal switch allows light to pass in the Z-direction of the optical axis of the crystal, and applies a driving voltage in the X / Y direction of the crystal, wherein the voltage is between 150 and 200V, and the repetition frequency is between 1 and 1000 Hz. The made KTN electro-optical laser is low in drive voltage, is good in universality, is wide in applicable bandwidth, is compact in structure, is low in cost, is good in stability, is practical and can be taken as a commodity.

Description

technical field [0001] The invention relates to a low-voltage driven electro-optical Q-switching switch device based on tetragonal potassium tantalum niobate crystal, which belongs to the field of laser devices. Background technique [0002] Large pulse, high repetition rate, high and low temperature suitable lasers are widely used in medical treatment, science and technology and measurement, especially in the fields of national defense and national security such as laser ranging, laser rejection and infrared countermeasures. need. Electro-optic Q-switching is a practical technology for directly generating high-energy pulsed lasers. Electro-optic crystals are the most widely used in electro-optic Q-switching switches. The most commonly used electro-optic crystals are diditerium potassium phosphate (abbreviation: DKDP), lithium niobate (abbreviation: LN), barium metaborate (abbreviation: β-BBO), and rubidium titanyl phosphate (abbreviation: RTP). It meets the basic needs o...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01S3/115H01S3/16
Inventor 王旭平马玲刘冰邱程程王继扬
Owner 山东山科智晶光电科技有限公司
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