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Device for measuring damage threshold under combined action of three-wavelength pulse laser and debugging method

A technology of pulsed laser and co-action, applied in the direction of measuring devices, optics, optical components, etc., can solve the problems of different refraction offsets, deviations, and increased measurement errors

Active Publication Date: 2011-09-07
TONGJI UNIV
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Problems solved by technology

However, multiple high reflection sheets and neutral density attenuators have different refraction offsets for different wavelengths, and the actual deviation will be caused after the element is removed; more importantly, the attenuation sheets with different attenuation multiples have different transmittances for different wavelengths. The rate is different, with the fundamental frequency ω 1 and triple frequency ω 3 For example, it is possible to reach 10 3 and above, forcing different wavelengths to require different numbers of attenuation components; in addition, the difference between this debugging environment and the real application environment significantly increases the measurement error

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  • Device for measuring damage threshold under combined action of three-wavelength pulse laser and debugging method
  • Device for measuring damage threshold under combined action of three-wavelength pulse laser and debugging method
  • Device for measuring damage threshold under combined action of three-wavelength pulse laser and debugging method

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Embodiment Construction

[0044] The present invention will be further described below in conjunction with the embodiments shown in the accompanying drawings.

[0045] refer to figure 1 , a damage threshold measurement device under the combined action of three-wavelength pulsed lasers,

[0046] It includes first lasers 1 sequentially arranged on the optical path to generate a fundamental frequency beam;

[0047] One-half wave plate 2, changing the vibration direction of the linearly polarized light of the fundamental frequency beam, adjusting the half wave plate 2 will change the frequency doubling and triple frequency of the fundamental frequency laser after the frequency doubling and frequency doubling crystal 3 Conversion efficiency, by adjusting the half-wave plate 2, the fundamental frequency, frequency-doubled and triple-frequency lasers with different maximum output energies can be obtained;

[0048] Frequency-doubling and triple-frequency crystal 3, the base frequency beam passes through the ...

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Abstract

The invention discloses a device for measuring a damage threshold under the combined action of a three-wavelength pulse laser and a debugging method. The measuring device is used for separating the three-wavelength pulse laser, singly controlling energy and gathering light beams. And then a light beam coupling system which is matched with an optical distance of a light split system is used for ensuring the time synchronization of the three-wavelength. The method comprises the following steps: primarily aligning by utilizing an alignment laser, two light-transmitting diaphragms and a three-wavelength light beam; utilizing an on-line microscope to monitor the damage information of each wavelength laser to the sensitive photographic paper and calculating the central coordinates of the damagepoints generated on a measured sample by different wavelengths, by comparing and analyzing the images before and after being radiated with lasers; and referring the central coordinates, and successively adjusting the light spot information of each wavelength till superposing the three-wavelength light spot centers.

Description

technical field [0001] The invention relates to the field of testing the anti-laser damage performance of optical components, in particular to a method for adjusting the time and space synchronization of three-wavelength pulse lasers to realize the measurement of the damage threshold of optical components under the joint action of different wavelength lasers. Background technique [0002] In the field of strong laser applications, frequency-doubling and triple-frequency separation components are used under the joint action of multiple wavelengths, especially triple-frequency separation membranes, which are often irradiated by pulsed lasers of three wavelengths at the same time. Laser damage characteristics affect the normal operation of the entire system. Therefore, studying the anti-laser damage performance under simultaneous irradiation of three-wavelength pulsed lasers, understanding the mechanism of three-wavelength laser action and coupling damage mechanism is one of th...

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Application Information

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IPC IPC(8): G01N17/00G02B27/10
Inventor 马彬沈正祥丁涛程鑫彬周刚焦宏飞张锦龙王占山
Owner TONGJI UNIV
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