Regenerative amplifier device with adjustable pulse energy and time intervals

A pulse energy, regenerative amplification technology, which is applied to the device for controlling laser output parameters, laser components, semiconductor lasers, etc., can solve the problems of poor controllability of pulse energy, inability to adapt to various processing materials, poor controllability of pulse energy, etc.

Inactive Publication Date: 2017-05-17
ACAD OF OPTO ELECTRONICS CHINESE ACAD OF SCI
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Problems solved by technology

[0006] 2) The energy controllability of the pulses in the pulse train is poor, and it can only be controlled to rise or fall with a specific slope
[0007] The existing pulse train mode has problems such as constant pulse time interval and poor controllability of specific pulse energy, which cannot be adapted to a variety of processing materials

Method used

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  • Regenerative amplifier device with adjustable pulse energy and time intervals
  • Regenerative amplifier device with adjustable pulse energy and time intervals

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Embodiment Construction

[0027] In order to make the object, technical solution and advantages of the present invention clearer, the present invention will be described in further detail below in conjunction with specific embodiments and with reference to the accompanying drawings.

[0028] A regenerative amplification device with adjustable pulse energy and time interval provided by an embodiment of the present invention includes: an optical part and an electrical part; the optical part sequentially includes a mode-locked oscillator, an optical isolation system and a regenerative amplifier according to the direction of light propagation, Wherein, the mode-locked oscillator is used to generate a seed pulse sequence, the optical isolation system includes a first polarization device, a Faraday rotator, and a half-wave plate in sequence according to the direction of light propagation, and the regenerative amplifier includes a pump source , a first lens, a gain crystal, a second polarizer, a quarter-wave p...

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Abstract

The invention discloses a regenerative amplifier device with adjustable pulse energy and time intervals, and a method for generating controllable pulses by using the regenerative amplifier device. An electro-optical Q-switch driving source is controlled through controlling a synchronous trigger, so that voltage at two ends of an electro-optical Q-switch is changed and switching of one energy storage stage and a pulse amplification stage is completed; and arbitrary control on the time intervals and the energy of the pulses in a pulse train is achieved through controlling the turn-on or turn-off time length of the electro-optical Q-switch and the time intervals of the pulse amplification stage and the next energy storage stage.

Description

technical field [0001] The invention relates to the technical field of laser processing, in particular to a regenerative amplification device with adjustable pulse energy and time interval. Background technique [0002] In laser ultrafast (picosecond or femtosecond) processing, the ablation effect has a logarithmic relationship with the pulse energy, and the burst mode (Burst Mode) can significantly increase the material ablation speed. This mode allows the same total energy to be divided into several pulses, which can then be superimposed to achieve higher removal rates. The "BurstMode" mode effectively improves the laser processing capability and greatly expands its application field. This mode has proven to be very effective when machining conductive materials such as steel and carbide. For example, tests have shown that under certain conditions, using a train of five consecutive pulses instead of a single pulse can increase the ablation rate by a factor of 5 to 10. ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01S3/102H01S5/06
CPCH01S3/1024H01S5/0615
Inventor 黄玉涛樊仲维张鸿博刘学松麻云凤闫莹连富强白振岙
Owner ACAD OF OPTO ELECTRONICS CHINESE ACAD OF SCI
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