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Phase locking multi-light beam coherent superimposed optical fiber laser

A fiber laser, coherent superposition technology, applied in the direction of the structure/shape of the active medium, can solve problems such as poor beam quality, achieve high beam quality, increase system stability, and reduce echo reflections

Inactive Publication Date: 2005-10-26
CHANGCHUN INST OF OPTICS FINE MECHANICS & PHYSICS CHINESE ACAD OF SCI
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Problems solved by technology

[0004] In order to solve the problem that the superimposed beam energy in the incoherent superposition of multiple laser beams is just a simple addition of the energy of each laser beam, and the beam quality of the multi-mode output after superimposition is not good, the invention realizes the phase locking of multiple laser beams, and provides a A fully coherent and single-mode laser is output to obtain a fiber laser with higher power and better beam quality than ordinary multi-laser beams without phase locking.

Method used

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  • Phase locking multi-light beam coherent superimposed optical fiber laser
  • Phase locking multi-light beam coherent superimposed optical fiber laser

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Embodiment 1

[0019] Specific Implementation A phase-locked multi-beam coherent superposition fiber laser is fabricated. like figure 1 As shown, it includes a fiber laser 1 that outputs polarized light, a polarization-maintaining fiber isolator 2, a 1×N+1 fusion-tapered polarization-maintaining fiber coupler 3, a fiber phase modulator 4, a fiber amplifier 5, and 90:10 polarization-maintaining Fiber coupler 6, 1×N fusion-tapered polarization-maintaining fiber coupler 7, 1×2 fusion-tapered polarization-maintaining fiber coupler 8, feedback control circuit 9, lens 10. like figure 2As shown, the feedback control circuit 9 includes an avalanche photodiode or PIN photodiode 11 and a high frequency amplifier 12 . The polarized light output from the fiber laser 1 is split into N+1 beams of polarized laser beams with equal energy through a 1×N+1 fusion-tapered polarization-maintaining fiber coupler 3, one of which is used as a reference laser beam, which is again The 1×N fusion-tapered polarizat...

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Abstract

This invention relates to a phase-locking multi-beam coherent addition fiber laser, which is made up of a fiber laser outputting polarized lights, a fiber phase modulator, a fiber amplifier, a melted tapered polarization maintaining fiber coupler and a feed-back control circuit. It is a fiber laser with high bean quality as well as outputting high power by phase-locking multi-beam coherent addition.

Description

Technical field: [0001] The invention relates to a fiber laser, in particular to a fiber laser with coherent superposition output of phase-locked multi-laser beams. technical background: [0002] Fiber lasers have been around almost as long as the lasers themselves. Not long after the advent of lasers, Znitzer and Koestor of American Optical Corporation first proposed the idea of ​​fiber lasers and amplifiers in 1963. Fiber laser has the characteristics of high efficiency, low threshold, narrow line width, tunable, compact, high cost performance, easy to manufacture, rich wavelength, etc. It is widely used in optical communication, industrial processing, medicine, scientific research, image recording and printing, computer and Microelectronics manufacturing, spectroscopy and other fields have a very wide range of uses. By superimposing multiple laser beams, if the multiple laser beams meet the complete coherence condition, high-power and near-diffraction-limited laser ligh...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01S3/067
Inventor 王蓟王国政王立军
Owner CHANGCHUN INST OF OPTICS FINE MECHANICS & PHYSICS CHINESE ACAD OF SCI
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