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Femto-second laser device convenient for laser pulse width adjustment

A femtosecond laser, laser technology, applied in lasers, laser parts, phonon exciters, etc., to achieve the effect of continuously adjustable laser pulse width and stable beam quality

Inactive Publication Date: 2018-05-25
ACAD OF OPTO ELECTRONICS CHINESE ACAD OF SCI
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] However, the femtosecond lasers currently used clinically have a fixed laser pulse width during surgery, and the laser pulse width is the same value at different corneal depths, which cannot guarantee the best laser ablation effect at different corneal depths. , if the laser pulse width can change with the depth of laser action in the cornea, better surgical results can be achieved

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  • Femto-second laser device convenient for laser pulse width adjustment

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Embodiment Construction

[0035] The present invention will be described below through specific embodiments in conjunction with the accompanying drawings. Those skilled in the art can understand that this description is only for the purpose of illustration and does not constitute any limitation on the scope of the present invention.

[0036] Such as figure 1As shown, the present invention relates to a femtosecond laser capable of conveniently adjusting the laser pulse width, which includes a pumping laser diode 1, a converging lens 2, a laser crystal 3, a chirped mirror 4, and a semiconductor saturable Absorbing mirror 7, prism 5, and end mirror 6, wherein prism 5 is a pair of prisms placed on a motorized translation stage that can adjust relative positions, wherein the laser cavity of the femtosecond laser oscillator also includes a chirped mirror for dispersion compensation 4 and a pair of prisms 5 .

[0037] The prism pair includes the first prism and the second prism, and the adjustment range of i...

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Abstract

The invention relates to a femto-second laser device convenient for laser pulse width adjustment. The laser device comprises a pump laser diode, a condenser lens, a laser crystal, a chirped mirror, asemiconductor saturable absorber mirror, prisms and an end mirror which are sequentially disposed on the laser output path, wherein the prisms are a prism pair arranged on a motorized translation stage and can realize adjustment of the relative position, and a laser chamber of the femto-second laser device further comprises one chirped mirror for dispersion compensation and the prism pair. The invention further relates to the femto-second laser device for purposes of steel sample component detection or the laser eye surgery. The femto-second laser device is advantaged in that a light source with 200-1000 femto-second continuous change laser pulse width for the femto-second laser eye surgery can be realized, the laser pulse width changes along with the laser position in a cornea during femto-second laser ablation of the cornea, and the best laser ablation effect can be realized.

Description

technical field [0001] The invention relates to a femtosecond laser which can conveniently adjust the pulse width of the laser and is used as a light source of a laser-induced plasma spectroscopic analysis device (LIBS) for the detection of steel sample components, especially for real-time on-line detection of steel sample components, or for laser eye surgery , especially femtosecond laser keratoplasty and femtosecond laser in situ keratomileusis. Background technique [0002] On the one hand, laser-induced plasma spectroscopy (Laser Induced Plasma Spectroscopy, LIPS), also known as laser-induced breakdown spectroscopy (Laser Induced Breakdown Spectroscopy, LIBS), is an atomic The emission spectrum analysis method is an element composition and concentration analysis technology based on the physics and spectroscopy of laser-matter interaction. LIPS focuses a high-energy short-pulse laser beam on the sample to be detected, thereby generating a high-temperature and high-densit...

Claims

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Application Information

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IPC IPC(8): H01S3/10G01N21/71
CPCG01N21/718H01S3/0071H01S3/10023
Inventor 孙辉樊仲维
Owner ACAD OF OPTO ELECTRONICS CHINESE ACAD OF SCI
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