Biaxial-crystal electro-optical Q switch and fabrication method thereof

Abstract

The invention provides a biaxial-crystal electro-optical Q switch and a fabrication method thereof. The biaxial-crystal electro-optical Q switch is made of an integrated rectangular biaxial-crystal electro-optical crystal, a phase compensation wave plate is arranged at a central position of a light through direction of the electro-optical Q switch, electro-optical crystal components are arranged at parts of two sides of the phase compensation wave plate of the electro-optical Q switch, electrode plates are electroplated on two c surfaces, which extend along the light through direction and are parallel to each other, of each electro-optical component, the length of the phase compensation wave plate in the light through direction is odd times of the thickness of the phase compensation plate which is used for generating phase delay on a target laser, and the lengths of the two electro-optical crystal components are same. By the biaxial-crystal electro-optical Q switch, the temperature stability of the Q switch can be effectively and reliably improved, the Q switch is low in insertion loss and is simple to operate, the influence on the temperature stability of the Q switch caused by change of static birefringence of the biaxial-crystal electro-optical crystal with a temperature can be solved, and the inherent extinction ratio of the electro-optical Q switch is also ensured.

Description

technical field [0001] The invention relates to the technical field of laser equipment, in particular to a biaxial crystal electro-optical Q-switch and a preparation method thereof. Background technique [0002] The electro-optical Q-switch is a switch that uses the electro-optic effect of the crystal to change the polarization state of the laser light passing through the crystal, thereby connecting or cutting off the oscillating optical path in the cavity. It has the advantages of short switching time, high efficiency, pulse width, and peak power. It is an important device for solid-state lasers and has been widely used in laser technology. The traditional electro-optical Q-switches currently used in laser technology are mainly composed of KD 2 PO 4 , LiNbO 3 Made of uniaxial crystals. But these two crystals each have some shortcomings. KD 2 PO 4 (KD*P for short) crystal absorbs moisture and needs to be protected by a moisture-proof box with a complex structure durin...

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Problems solved by technology

[0005] Aiming at the defects in the prior art, the present invention provides a biaxial crystal electro-optical Q-switched switch and its preparation method; it can effectively and reliably improve the temperature stability of the Q-switched switch, has low insertion loss and is easy to operate, and can not only solve the problems caused by dual The influence of the static birefringence of the axial crystal electro-optic crystal on the temperature stability of the Q-switching switch as the temperature changes, while also ensuring the inherent extinction ratio of the electro-optic Q-switching switch

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