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Optical fiber laser of semiconductor laser pumping

A fiber laser and laser pumping technology, applied in the laser field, can solve the problems of complex structure, high cost and low laser beam brightness of fiber lasers, and achieve the effect of improving the quality of the outgoing beam and simple installation

Active Publication Date: 2013-07-10
杭州盛镭激光科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] The present invention provides a fiber laser pumped by a semiconductor laser, aiming to solve the problems in the prior art that the brightness of the laser beam produced by the fiber laser is low, or the fiber laser with high power output has a complex structure and high cost

Method used

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  • Optical fiber laser of semiconductor laser pumping
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  • Optical fiber laser of semiconductor laser pumping

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Embodiment 1

[0041] Embodiment 1 of the present invention provides a fiber laser pumped by a semiconductor laser.

[0042] There are two main methods to improve the brightness of fiber-coupled lasers: coherent superposition and non-coherent superposition: the essence of coherent superposition is the superposition of light wave amplitude, which can effectively improve the beam quality of the output beam of a single semiconductor array, and finally improve the brightness of fiber-coupled laser. However, it is necessary to lock the phase of each superimposed sub-light source synchronously, which is technically difficult, and it is not easy to obtain high-power in-phase stable output; incoherent superposition is the superposition of light intensity, such as beam shaping method, polarization superposition method and wavelength superposition method. However, incoherent stacking is difficult to obtain high-brightness fiber-coupled laser beams, and the improvement of beam quality is limited. The b...

Embodiment 2

[0055] Embodiment 2 of the present invention also provides a fiber laser pumped by a semiconductor laser.

[0056] The difference between this embodiment and Embodiment 1 is that in this embodiment, the semiconductor laser device 1 is a multi-array semiconductor laser device. The fiber laser also includes a semiconductor laser device, an aspheric lens, a dielectric fiber, a first grating and a second grating, which are sequentially arranged along the optical path for generating ultra-high brightness pump laser light, wherein the first grating and the second grating respectively Engraved on both ends of the core of the dielectric fiber, the first grating and the second grating form an all-fiber reflection cavity mirror. Wherein, both the first grating and the second grating are Bragg gratings, that is, the first Bragg grating and the second Bragg grating. The ultra-high-brightness pump laser beam output from the semiconductor laser device is focused by an aspheric lens and ent...

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Abstract

The invention relates to the technical field of laser and provides an optical fiber laser of semiconductor laser pumping. The optical fiber laser comprises a semiconductor laser device, an aspheric surface lens, medium optical fiber, a first grating and a second grating, wherein the semiconductor laser device, the aspheric surface lens, the medium optical fiber, the first grating and the second grating are sequentially arranged along a light path and used for producing super brightness pumping laser. The first grating and the second grating are respectively etched at two ends of a fiber core of the medium optical fiber in an optical mode, and the first grating and the second grating form a full optical fiber reflection cavity mirror; a super brightness pumping laser bundle output by the semiconductor laser device enters a pumping package layer of the medium optical fiber through the aspheric surface lens; and under effects of the first grating and the second grating, after the pumping laser bundle exceeds pumping power threshold value, laser oscillation is generated in the inner core diameter of the optical fiber, and the super brightness laser is output outwards from one end of the second grating. The super brightness optical fiber laser can be obtained, and the optical fiber has the function of preventing light from reflecting by self.

Description

【Technical field】 [0001] The invention relates to the field of laser technology, in particular to a fiber laser pumped by a semiconductor laser. 【Background technique】 [0002] High-power semiconductor laser devices have the advantages of high electro-optical conversion efficiency, small size, high reliability and long life, and have extremely important application values ​​in many fields such as industrial processing, biomedicine, and national defense. With the development of semiconductor laser technology, the output power of a single-array semiconductor laser (LDA, Laser Diode Array) has reached the kilowatt level, and the electro-optical conversion efficiency can reach more than 60%. However, the waveguide structure of semiconductor lasers leads to poor beam quality, the optical parameters in the fast and slow axis directions are positively unbalanced, the fast axis direction is close to the diffraction limit, and the beam quality in the slow axis direction is extremely ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01S3/067H01S3/0941H01S3/23H01S3/101
Inventor 扈金富余勤跃
Owner 杭州盛镭激光科技有限公司