Ultra-narrow linewidth single-frequency fiber laser

A fiber laser, ultra-narrow linewidth technology, applied in lasers, laser parts, phonon exciters, etc., can solve the problems of no substantial progress, single-frequency fiber laser stay, etc., to achieve simple structure, short length, high performance stable effect

Pending Publication Date: 2021-06-29
江苏朗普达光电科技有限公司
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, due to no substantial progress in ultra-narrow-spectrum fiber grating filters, the linewidth of single-frequency fiber lasers has remained at the kHz level, and there has been no breakthrough for a long time

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  • Ultra-narrow linewidth single-frequency fiber laser
  • Ultra-narrow linewidth single-frequency fiber laser
  • Ultra-narrow linewidth single-frequency fiber laser

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Embodiment Construction

[0022] Embodiments of the present invention are described in detail below, examples of which are shown in the drawings, wherein the same or similar reference numerals designate the same or similar elements or elements having the same or similar functions throughout. The embodiments described below by referring to the figures are exemplary only for explaining the present invention and should not be construed as limiting the present invention.

[0023] Those skilled in the art will understand that unless otherwise stated, the singular forms "a", "an", "said" and "the" used herein may also include plural forms. It should be further understood that the word "comprising" used in the description of the present invention refers to the presence of said features, integers, steps, operations, elements and / or components, but does not exclude the presence or addition of one or more other features, Integers, steps, operations, elements, components, and / or groups thereof. It will be unders...

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Abstract

The invention provides an ultra-narrow linewidth single-frequency fiber laser. The ultra-narrow linewidth single-frequency fiber laser is composed of a symmetric variable ripple period grating directly engraved on a rare earth-doped fiber, a wavelength division multiplexer, pumping laser and a fiber isolator, the symmetric variable ripple period grating engraved on the rare earth-doped fiber is welded with a signal end of the wavelength division multiplexer to form an ultra-narrow linewidth fiber laser resonant cavity, the pumping laser is welded with a pumping end of the wavelength division multiplexer, the input end of the optical fiber isolator is connected with the other signal end of the wavelength division multiplexer, pumping laser pumps an optical fiber laser cavity of the erbium-doped optical fiber engraved with the symmetric variable ripple period grating through the optical fiber wavelength division multiplexer, and ultra-narrow linewidth laser is output to the input end of the optical fiber isolator from the other signal end of the wavelength division multiplexer and is output in a one-way mode through the output end of the optical fiber isolator. The ultra-narrow linewidth fiber laser can effectively suppress or eliminate the influence of environmental changes on laser output parameters. The fiber laser has the advantages of being simple in structure, stable in performance and ultra-narrow in output single-frequency laser linewidth.

Description

technical field [0001] The invention relates to the technical field of fiber lasers, in particular to an ultra-narrow linewidth single-frequency fiber laser. Background technique [0002] At present, the main cavity types used in narrow-linewidth single-frequency fiber lasers are wired cavity and ring cavity. The structure of the linear cavity is simple, the cavity is short and the work is stable, and there is basically no problem of mode hopping; the cavity of the ring cavity is long and the gain is high, and various filter devices can be added in the cavity to obtain narrow line width or wavelength Tuning, but there will be random mode hopping. In order to solve this problem, a saturable absorber or composite ring is generally set in the light wave transmission loop to achieve single-frequency output, but this design increases the complexity of the optical path, which directly leads to the large size of the fiber laser and the impact on the environment (temperature, vibra...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01S3/067H01S3/094
CPCH01S3/06716H01S3/0675H01S3/094
Inventor 周开军杨远洪
Owner 江苏朗普达光电科技有限公司
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