a regenerative amplifier

A regenerative amplifier and regenerative amplification technology, which is applied in the laser field, can solve the problems of limiting the highest pulse energy and the limited damage threshold of acousto-optic crystals, and achieve the effects of reducing requirements, saving costs, and facilitating maintenance

Active Publication Date: 2021-02-26
WUHAN HUARAY PRECISION LASER
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  • Abstract
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  • Claims
  • Application Information

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Problems solved by technology

Because of the limited damage threshold of acousto-optic crystals, the thin beam limits the highest pulse energy that can be generated by regenerative amplifiers with Bragg cells as switching elements

Method used

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Embodiment Construction

[0026] The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only some, not all, embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the protection scope of the present invention.

[0027] see figure 1 , The embodiment of the present invention provides a regenerative amplifier, including a pumping component 30 and a regenerative amplifier cavity 20, and the regenerative amplifier cavity 20 is provided with a gain medium 5, a hollow fiber assembly and an acousto-optic switch. Wherein, the hollow fiber assembly is used to prolong the total optical path in the regenerative amplification cavity 20 and conduct the seed light 18 therein, the pu...

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Abstract

The invention relates to the field of laser technology, and provides a regenerative amplifier, including a pumping component and a regenerative amplifier cavity, in which a gain medium, a hollow fiber component, and an acousto-optic switch are arranged; the hollow fiber component is used to prolong the regenerative The total optical path in the amplifying cavity is used to conduct the seed light; the pumping component is used to provide energy for the gain medium; the gain medium is used to store the energy provided by the pumping component and supply the seed light Extraction: an acousto-optic switch, used to inject seed light into the regenerative amplification cavity and export the seed light extracted from the energy in the gain medium to the outside of the regenerative amplification cavity. The present invention prolongs the total optical path in the regenerative amplification cavity by adopting the hollow fiber assembly, so that the time required for the laser pulse to travel in the cavity for a week is more than 50 ns, which is convenient for the acousto-optic switch to have sufficient efficiency and response time to switch a beam with a diameter of The laser pulse above 0.3mm reduces the requirement of the acousto-optic switch, saves the cost and facilitates the maintenance.

Description

technical field [0001] The invention relates to the field of laser technology, in particular to a regenerative amplifier. Background technique [0002] High-power pulsed laser energy with pulse energy ranging from tens of μJ (microjoule) to mJ (mJ), repetition frequency ranging from tens of kHz (kilohertz) to several MHz (megahertz), and pulse width ranging from picoseconds to nanoseconds It meets the fine processing requirements of many materials and can be widely used in laser cutting, engraving, scribing and marking and other fields. Picosecond lasers can also be applied to fine processing of brittle materials. Since the pulses directly generated by gain switches or mode-locked lasers (when the pulse width is 1 nanosecond or less) are generally low in energy, they cannot be directly used in laser processing. [0003] Regenerative amplification technology can be used to amplify the optical pulse generated by the above-mentioned oscillator, so as to obtain laser pulses wi...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01S3/067H01S3/10H01S3/102H01S3/106
CPCH01S3/06741H01S3/06754H01S3/10007H01S3/1024H01S3/1068
Inventor 华仁忠
Owner WUHAN HUARAY PRECISION LASER
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