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Regenerative amplifier

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

Active Publication Date: 2018-10-19
WUHAN HUARAY PRECISION LASER
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  • Abstract
  • Description
  • 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 technical field of laser and provides a regenerative amplifier comprising a pumping component and a regenerative amplifying cavity, wherein a gain medium, a hollow opticalfiber component and an acousto-optic switch are arranged in the regenerative amplifying cavity; the hollow optical fiber component is used for extending a total optical path within the regenerative amplifying cavity and seed light is conducted thereon; the pumping assembly is used for providing energy for the gain medium; the gain medium is used for storing energy provided by the pumping component and the energy is extracted via seed light; the acousto-optic switch is used for injecting the seed light into the regenerative amplifying cavity and exporting the seed light which extracts the energy in the gain medium. In the regenerative amplifier disclosed in the invention, the hollow optical fiber module is used to extend the total optical path in the regenerative amplifying cavity, so thattime required for a laser pulse to be transmitted in the cavity for one cycle is more than 50 ns, the acousto-optic switch is enabled to be sufficient in efficiency and response time to turn on or off the laser pulse which is greater than 0.3 mm in beam diameter, requirements of the acousto-optic switch can be lowered, cost is saved and easy maintenance can be realized.

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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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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