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Monolithic pulse compressor and associated calibration method

A technology of pulse compression, intermediate components, applied to the structure/shape of optical resonators, instruments, lasers, etc.

Pending Publication Date: 2022-03-04
TRUMPF LASER GMBH CO KG
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

For lasers based on CPA technology, this requires a very high optomechanical stability of the pulse compressor, which is difficult to achieve with the aid of mechanical holders

Method used

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  • Monolithic pulse compressor and associated calibration method
  • Monolithic pulse compressor and associated calibration method
  • Monolithic pulse compressor and associated calibration method

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Embodiment Construction

[0037] The pulse compressor 1 shown in FIG. 1 is implemented as a so-called Trasser compressor with two diffraction gratings 2 , 3 and with a prism 4 . These optical components 2 - 4 are each fastened on a preferably transparent base plate 6 by means of three intermediate elements 5 a - 5 c. The three optical components 2-4, the intermediate elements 5a-5c and the substrate 6 can all consist of the same non-absorbing material, in particular of quartz glass, or have a difference in coefficient of thermal expansion of less than 10e -6 / K of different materials. These different materials can be, for example, sapphire, BK7 glass or glass-ceramic, all of which have less than 10e -6 / K expansion coefficient. Advantageously, the optical components 2-4, the intermediate elements 5a-5c and the substrate 6 have a thermal expansion coefficient of less than 10e -6 / K material composition.

[0038] as in figure 2 As shown in , the first intermediate element 5a and the second intermediat...

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PUM

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Abstract

In a pulse compressor (1) having a plurality of optical components (2-4) wherein at least one of the plurality of optical components is a diffraction grating (2, 3), according to the invention at least one of the optical components (2-4) is fixed to a substrate (6) by means of at least three intermediate elements (5a-5c) laser-welded to one another, a first and a second intermediate element (5a, 5c) being laser-welded to one another, according to the invention, the first and second intermediate elements (5a, 5b) are fastened to the substrate (6), while the third intermediate element (5c) is fastened to the optical component (2-4), and the joining surfaces (7b) of the first and second intermediate elements (5a, 5b) resting on the third intermediate element (5c) and the joining surfaces (8b) of the third intermediate element (5c) resting on the first and second intermediate elements (5a, 5b) are curved. In this case, the laser-welded joining surfaces of the at least one optical component (2-4), the intermediate element (5a-5c) and the substrate (6) consist of at least a material having a difference in coefficient of thermal expansion of less than 10 e-6 / K.

Description

technical field [0001] The invention relates to a pulse compressor with a plurality of optical components, at least one of which is a diffraction grating, and to a method for aligning and fixing at least one optical component of the pulse compressor. Background technique [0002] Pulse compressors are used for so-called chirped pulse amplification (CPA) in order to generate laser pulses with maximum pulse peak powers up to the petawatt range. Such high peak powers cannot be directly generated by laser beam sources because the laser's gain medium is usually destroyed by nonlinear optical effects. Thus, prior to amplification, the laser pulse is temporally stretched in a pulse stretcher, whereby the peak pulse power of the laser pulse is reduced, and the laser pulse then passes through the gain medium. After amplification, the laser pulses are compressed and then have a correspondingly higher power density. [0003] Due to the high strength that occurs, compressors usually c...

Claims

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Application Information

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IPC IPC(8): H01S3/067H01S3/00H01S3/08H01S3/11
CPCH01S3/06712H01S3/08036H01S3/1106H01S3/0057H01S3/0014H01S3/0071H01S3/005G02B7/003G02B7/008B23K26/21G02B5/18H01S3/067
Inventor D·鲍尔A·布德尼基R·塞勒M·沙龙
Owner TRUMPF LASER GMBH CO KG