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Automatic calibrating device for positive branch confocal unstable resonator mirror

An automatic calibration, unstable cavity technology, applied in nonlinear optics, laser parts, optics, etc., can solve the problems of complex device, control algorithm, poor output beam quality, and difficulty in correcting multi-order aberrations. The effect of reducing the relative freedom of movement, saving control costs, and improving the efficiency of cavity adjustment

Inactive Publication Date: 2006-03-08
INST OF OPTICS & ELECTRONICS - CHINESE ACAD OF SCI
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Problems solved by technology

When a high-energy laser outputs laser light, the environment in the cavity is very harsh, there are strong airflow disturbances and other factors that affect the imbalance of optical components in the cavity, so the quality of the output beam will deteriorate, which will affect the application of the laser. Correcting all beam aberrations not only complicates the device and control algorithm, but also makes it difficult to take care of multi-order aberrations, because there is no theoretical solution to the aberrations in the laser resonator cavity and the laser output power, near-field light intensity and phase. The corresponding relationship of the distribution; in addition, if the correction of all beam quality is handed over to the external purification system, it will increase the burden on the external purification system, and it is difficult to achieve satisfactory results

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  • Automatic calibrating device for positive branch confocal unstable resonator mirror
  • Automatic calibrating device for positive branch confocal unstable resonator mirror
  • Automatic calibrating device for positive branch confocal unstable resonator mirror

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Embodiment Construction

[0023] As shown in Figure 1, it is a schematic diagram of the structure of the current standard positive branch confocal unstable cavity. Since no folding mirror is used, the lateral dimension of the resonant cavity is relatively long;

[0024] Figure 2 is figure 1 Schematic diagram of the improved structure of the non-stable cavity, that is, adding a folding mirror, which improves the working efficiency of the resonator and shortens the lateral size of the resonator. It is the optical path diagram of the resonator without considering the automatic calibration system in the cavity;

[0025] As shown in Figure 3, the present invention consists of a He-Ne laser 5, an intracavity folding mirror 4 with a small hole 15 structure, a scraper mirror 3 with a small hole 16, a convex mirror 2, and a Hart detector for detecting the output beam quality of the laser. Mambo front sensor 8, main controller 9 and concave mirror 1 with stepper motor actuator three-position adjustment frame 10,...

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Abstract

The calibrating device is composed of following parts: He-Ne laser, folding mirror with structure of aperture in cavity, drawknife mirror with aperture, convex mirror, Hartmann wave front sensor for detecting quality of light beam output from laser, main controller and concave mirror with actuator of step motor. Adjusting convex mirror of main control mirror can correct errors of slant, dithering and defocus of laser beam in high energy inside laser cavity. Comparing with prior art, the invention solves main factor of influencing quality of light quality so as to simplify installation and adjustment of control system. Features are: simple structure, stable, easy of manufacturing and easy of implementation of control algorithm.

Description

technical field [0001] The invention belongs to an automatic calibration device of a laser resonant cavity mirror, and an automatic calibration device in a positive branch confocal unstable cavity mirror. Background technique [0002] The vigorous development of modern communication, the research of high-energy laser applications and the application of laser radar have put forward higher requirements on the quality of laser output beams. Therefore, continuous improvement and improvement of the quality of laser output beams is a hot spot in the world's cutting-edge technology research. [0003] Research has found that high-energy lasers can output approximate plane waves when working in an unstable cavity, and contain a small amount of high-order aberrations under the condition of removing beam tilt and defocus aberrations. Therefore, intracavity tilt and defocus aberrations are the main causes of beam quality deterioration major factor. When a high-energy laser outputs lase...

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Application Information

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IPC IPC(8): H01S3/00H01S3/08G02F1/35
Inventor 杨伟张翔杨平许冰
Owner INST OF OPTICS & ELECTRONICS - CHINESE ACAD OF SCI
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