An ultra-short pulse laser scan device

A technology of ultra-short pulse laser and scanning device, which is applied in optics, optical components, nonlinear optics, etc., can solve the problems of complex optical path design, improve focusing quality, improve multi-photon excitation efficiency, and facilitate wide-scale application Effect
CN100458493CInactive Publication Date: 2009-02-04HUAZHONG UNIV OF SCI & TECH
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
HUAZHONG UNIV OF SCI & TECH
Publication Date
2009-02-04
Estimated Expiration
Not applicable · inactive patent

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Abstract

The invention discloses an ultrashort pulse laser scanning device. It includes acoustooptic modulator and 2-D acousto-optic deflector which are at the same light path, the 2-D acousto-optic deflector is constructed with two acousto-optic deflectors, the included angle between the acousto-optic deflector and the acoustooptic modulator is 45+-5 degree. The modulating frequency of the acoustooptic modulator is fAOM=f+-10%f, the distance between the acoustooptic modulator and 2-D acousto-optic deflector is D=L+-10%L. When acousto-optic deflector is used to 2-D scan the laser, the device can compensate the spatial dispersion and temporal dispersion introduced by using acousto-optic deflector to scan ultrashort pulse laser beam. The device possesses simple structure, light path is easy to adjust, and it fits for the fields of femtosecond laser storage, imaging and laser micro-processing, specially the random scan of the laser beam.
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Description

technical field

[0001] The invention belongs to the technical field of laser scanning, and in particular relates to an ultrashort pulse laser scanning device with dispersion compensation function based on a two-dimensional acousto-optic deflector (AOD), which is suitable for femtosecond laser storage, imaging and laser scanning fields of micromachining. Background technique

[0002] Using acousto-optic deflectors to scan laser light is a very promising laser scanning technology. It is especially suitable for the fields of femtosecond laser storage, imaging and laser microprocessing. However, when using an acousto-optic deflector to scan an ultrashort pulse laser, the laser beam will produce spatial dispersion and temporal dispersion, which will affect the excitation efficiency of multiphotons. Therefore, spatial and temporal dispersion must be compensated for when ultrashort pulses are scanned using an AOD.

[0003] At present, there have been many articles and patents on...

Claims

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