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Annular-cavity single-column vector mode output pulse optical fiber laser device

A fiber laser and column vector technology, applied in lasers, laser parts, cladding fibers, etc., can solve the problem of inability to output column vector pulsed lasers, and achieve stable pulsed laser output, compact and stable structure.

Inactive Publication Date: 2019-05-17
安徽天琢激光科技有限公司
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  • Abstract
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Problems solved by technology

[0004] The purpose of the present invention is to solve the defect that the existing columnar vector pulsed fiber laser cannot output stable columnar vector pulsed laser. Column vector mode output pulsed fiber laser

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  • Annular-cavity single-column vector mode output pulse optical fiber laser device

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Embodiment Construction

[0026] In order to make the purpose, technical solution and advantages of the present invention clearer, the present invention will be further described in detail below in conjunction with specific embodiments and with reference to the accompanying drawings.

[0027] refer to figure 1 , which is an application example of the present invention—a pulsed fiber laser with a ring-cavity single cylinder vector mode output. In this laser, the pump source 1 is a semiconductor laser with a center wavelength of 975nm, and the wavelength division mode division multiplexer 2 is made of HI1060 single-mode fiber 8 and ring-core fiber 9, which can achieve 980nm / 1064nm wavelength multiplexing, and couple the LP01 mode with a center wavelength of 980 nm in the HI1060 fiber to the TE01 mode in the ring-core fiber 9 . The pigtail of the pump source 1 is welded to the pigtail of the pump end of the wavelength division mode division multiplexer 2 .

[0028] The structural reference of the ring c...

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Abstract

The invention discloses an annular-cavity single-column vector mode output pulse optical fiber laser device which comprises a pumping source (1), a waveform division and mode division multiplexer (2),a gain optical fiber (3), an optical fiber mode filter (4), a saturable absorber (5), an isolator (6) and an output coupler (7) which are sequentially connected, wherein the saturable absorber is based on an annular-core optical fiber. The optical fiber used by the laser device is the annular-core optical fiber, and cores of the optical fiber are annularly distributed, so that the refringence ishigh; the degeneracy between LP11 modes is reduced; intercoupling between a TE01 mode and other modes is reduced; the TE01 mode can stably exist in a laser cavity; and stable single-column vector modepulse laser output is achieved by adding the saturable absorber to the cavity. According to the laser device, a method of generating stable single-column vector mode pulse laser for an annular-cavityoptical fiber laser device is provided for the first time; and an application of the column vector pulse optical fiber laser device is facilitated. The laser device can be applied in the fields of laser processing, microimaging, photomemory and the like.

Description

technical field [0001] The invention relates to the technical field of pulsed fiber lasers, and specifically discloses a ring-cavity single cylinder vector mode output pulsed fiber laser. Background technique [0002] The TE01 mode beam is a kind of cylindrical vector beam, which can be converted to other cylindrical vector beams (TE01 mode, HE21 mode) through a wave plate. The cylindrical vector beam has an annular field intensity distribution with zero central intensity, and its polarization has axisymmetric Thanks to these two unique properties, column vector beams have important applications in the fields of laser processing, particle manipulation, microscopic imaging and optical storage. Compared with traditional circularly polarized beams, cylindrical vector beams have smaller focus spots and stronger longitudinal components under strong focusing conditions. Under the same power, the metal cutting efficiency of the cylindrical vector beam is more than twice that of th...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01S3/067H01S3/11G02B6/255G02B6/02
Inventor 张一民
Owner 安徽天琢激光科技有限公司
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