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Adjustment device for eliminating offset error of tiled grating

A technology for adjusting devices and gratings, which is applied in optics, optical components, instruments, etc., can solve the problems that there is no parallel monitoring of the grating surface, it is difficult to realize, and the cost is expensive, and achieves the effect of large error capture range, low cost, and simple structure

Inactive Publication Date: 2008-10-01
LASER FUSION RES CENT CHINA ACAD OF ENG PHYSICS
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Problems solved by technology

In 2006, Professor Zeng Lijiang of Tsinghua University published an article "Method to mosaic gratings by using a two-color heterodyne interferometer containing a reference grating" on Optics Letter, proposing to use two-wavelength heterodyne interferometry to eliminate misalignment errors, but This method does not monitor the parallelism of the two grating surfaces, and assumes that the groove density of the reference grating is exactly the same as that of the spliced ​​grating, which is difficult to achieve in practice; in addition, the experimental device includes two interferometers, two coaxial transmission beams The laser and the other two identical gratings are expensive and the process is complicated

Method used

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  • Adjustment device for eliminating offset error of tiled grating
  • Adjustment device for eliminating offset error of tiled grating
  • Adjustment device for eliminating offset error of tiled grating

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Embodiment Construction

[0019] The adjustment device for eliminating dislocation errors of spliced ​​gratings of the present invention includes a laser far-field monitoring part and a grating position adjustment part, and the dislocation error between spliced ​​grating surfaces is eliminated by the grating position adjustment part by monitoring the change of the far-field shape of the laser pulse.

[0020] The implementation process of the invention is as follows: firstly, a laser far-field monitoring part is established, and then the grating is finely adjusted by the monitoring laser far-field and the grating position adjustment part. like figure 1 As shown, build the monitoring optical path. The transmitted part of the probe light incident on the beam splitter 3 is respectively reflected by the first plane mirror 10, the second plane mirror 11, and the third plane mirror 12, and then vertically incident on the first grating 17 and the second grating 18, and the reflection The light returns through...

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Abstract

The invention relates to a adjusting device for eliminating the joining grating error. The adjusting device comprises the laser wave zone monitoring section and the grating location adjusting section, with the monitoring light divided into transmission beam and reflective beam after light splitter, with the transmission light vertically incidence to the jointing grating after three time reflection by plane reflective mirror, returning to the light splitting mirror along the original path, focused through lenses, amplified through microscope, imaging on ccd, reflective light after light splitter reflected through two times of plane reflection, a small hole plate, lens focusing, microscope amplification and imaging on the other ccd. It changes the angle of the detecting light based on the incidence angle relationship formula, eliminating the error location of the jointing grating, with simple structure, low cost, with error eliminated to the precision scope.

Description

technical field [0001] The invention belongs to a short-pulse laser pulse compression device, in particular to an adjustment device for eliminating misalignment errors of spliced ​​gratings. Background technique [0002] In short-pulse compression cell systems using stitched gratings, micron-scale misalignment errors between the stitched grating faces can cause focal spot splitting. Even if the method of pairing error compensation is used to compensate for the misalignment error by adjusting the width of the grating slit, it will affect the far-field time-domain characteristics of the compressed pulse, so it is necessary to fundamentally eliminate the misalignment error. In 2006, Professor Zeng Lijiang of Tsinghua University published an article "Method to mosaic gratings by using a two-color heterodyne interferometer containing a reference grating" on Optics Letter, proposing to use two-wavelength heterodyne interferometry to eliminate misalignment errors, but This method ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G02B27/00
Inventor 左言磊王逍朱启华黄征王凤蕊邓武黄小军魏晓峰
Owner LASER FUSION RES CENT CHINA ACAD OF ENG PHYSICS
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