Double-electro-optic modulation QNdi:YAG laser

A YAG laser, electro-optical technology, applied in the field of lasers, can solve the problems of shrinking the size of the oscillation mode, increasing the loss, and decreasing the effective utilization rate of the number of activated particles, and achieves the effect of compact structure and improved output power.

Inactive Publication Date: 2007-08-22
SHANGHAI INST OF OPTICS & FINE MECHANICS CHINESE ACAD OF SCI
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Problems solved by technology

Among them, the thermally induced birefringence of the gain medium significantly degrades the polarization of the laser beam. When there is a polarizer in the cavity, the loss in the cavity increases significantly, which will directly lead to a decrease in laser output power and become an important factor restricting

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  • Double-electro-optic modulation QNdi:YAG laser

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Embodiment Construction

[0019] Please refer to FIG. 1 . FIG. 1 is an overall schematic diagram of the laser resonator of the present invention. As can be seen from Fig. 1, the dual electro-optical Q-switched Nd:YAG laser of the present invention comprises a main optical path, which is on the main oscillation axis, and consists of an output coupling mirror 1, a Nd:YAG rod 2, and a polarizer 3 placed in sequence , the first 1 / 4 wave plate 4, the first Q-switching crystal 5, and the first rear cavity mirror 6, wherein the polarizer 3 forms a Brewster angle with the opposite direction of the outgoing laser light, and its characteristic is that there is also a Q-switching branch, the Q-switching branch is along the depolarization loss output optical path direction of the polarizer 3, composed of the second 1 / 4 wave plate 7, the second Q-switching crystal 8 and the second rear Laparoscope 9 constitutes.

[0020] The output coupling mirror 1 is a flat coupling mirror, and the rear cavity mirrors 6 and 9 ar...

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Abstract

A dual-photoelectric Q-switched Nd:YAG laser includes a main optical path on a main oscillation axes composed of an output coupling mirror, a Nd:YAG bar, a polariser, a first 1/4 wave plate, a first Q-switched crystal and a first back control mirror arranged orderly, in which, said polarizer is in Brewster angle with the opposite direction of emitted laser, which is charactered that a Q-switched branch is along the direction of depolarization lost of the polarizer and is composed of a second 1/4 wave plate, a second Q-switched crystal and a second back cavity mirror. This invention adds a Q-switched branch along the depolarization lost output optical path on the basis of the traditional Q-switched polarization cavity, so that, lost component is fed back to the cavity along the original path via the Q-switched switch to form effective laser output.

Description

technical field [0001] The invention relates to a laser, in particular to a double electro-optic Q-switched Nd:YAG laser. Background technique [0002] Solid-state lasers with high average power, high repetition rate, and high beam quality have important application values ​​in the fields of industrial processing, military equipment, space communication, and medical diagnosis and treatment. With the continuous improvement of the output performance of high-power semiconductor laser diode arrays, semiconductor laser-pumped all-solid-state lasers (DPSSL) have rapidly become a hot spot in the development of lasers due to their small size, high efficiency, and long life. [0003] In high-power all-solid-state lasers, the pumping spectrum of the semiconductor laser diode and the absorption spectrum of the solid gain medium can be matched, but due to the significant increase in the power density of the pumping light in the medium, severe thermal effects will occur, causing thermall...

Claims

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Application Information

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IPC IPC(8): H01S3/08
Inventor 邵杰冯永伟朱小磊陆雨田
Owner SHANGHAI INST OF OPTICS & FINE MECHANICS CHINESE ACAD OF SCI
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