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Side pumping method of optical-fiber laser

A fiber laser, side-pumped technology, applied in lasers, laser parts, phonon exciters, etc., can solve problems such as poor repeatability and mechanical instability, and achieve the effect of avoiding thermal melting and non-linear effects.

Inactive Publication Date: 2007-06-13
INST OF SEMICONDUCTORS - CHINESE ACAD OF SCI
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  • Claims
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AI Technical Summary

Problems solved by technology

The final realization of these methods requires fine and complicated optical fiber processes, such as V-groove side pumping technology, embedded mirror pumping mode, etc.; some are mechanically unstable and have poor repeatability, such as angle grinding and polishing methods, etc.

Method used

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  • Side pumping method of optical-fiber laser

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Embodiment

[0030] Fig. 1 is a schematic diagram of the side pumping structure of the present invention. The parameters of the double-clad optical fiber 9 in this embodiment are: core layer diameter: 20 ± 2 μm; inner cladding diameter: 400 ± 15 μm; outer cladding diameter: 550 ± 20 μm ; Core N.A.1 (numerical aperture): 0.06±0.01; Inner cladding N.A.2 (numerical aperture): 0.46±0.01.

[0031] The side pumping method of the fiber laser of the present embodiment comprises the following steps:

[0032] a) Use a femtosecond pulse laser to drill holes on the side of the double-clad fiber. The femtosecond pulse laser has a wavelength of 800±2nm, a pulse width of 120fs, a pulse frequency of 0.1-1kHz, a peak power of 1000kW, and a spot diameter of The diameter of the light spot is adjustable between 100 μm and 5 mm, and the angle θ between the drilled hole 4 and the double-clad optical fiber is 5 to 30°. The hole 4 passes through the outer cladding 5 of the double-clad fiber and enters the inner ...

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Abstract

The method realizes outputting laser from fiber laser finally through following means: using femtosecond level pulsed laser with specific parameters to carry out slant punching on side of doubly coated fiber; next, embedding coupled apparatus of semiconductor laser diode; then, adding front and back cavity mirrors on two end faces of doubly coated fiber to form resonance; finally, realizes outputting laser from fiber laser. The invention possesses advantages: (1) not influence on transmission of optical waveguides, no additional dislocation or defect on slant hole so as to avoid non-linear effect and heat melting; (2) raising quality in light mode of pump source, being in favor of maintaining, and eliminating heat so as to prolong service life; (3) cumulating pumped power unlimitedly in order to implement outputting large power of fiber laser; (4) convenient operation.

Description

technical field [0001] The invention belongs to the field of optoelectronic devices, in particular, the invention relates to a side pumping method of a fiber laser. Background technique [0002] In recent years, with the rapid development of high-power fiber-coupled semiconductor lasers and cladding pumping technologies, the pumping power and output power of Ytterbium-doped fiber lasers have been greatly improved, and many foreign research institutes have achieved hundreds to thousands of Many companies have commercialized high-power fiber lasers. [0003] The structure of the double-clad rare-earth-doped fiber is that the mode core is made of quartz material doped with ytterbium ions and other elements, as a laser oscillation channel; while the inner cladding is composed of a lateral dimension and a numerical aperture much larger than the core, and a refractive index than the fiber. It is a multimode fiber that accepts multimode laser diode (LD) pump light; it is precisely...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01S3/094H01S3/0941H01S3/067
Inventor 冯小明马骁宇方高瞻刘媛媛
Owner INST OF SEMICONDUCTORS - CHINESE ACAD OF SCI
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