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Research on Outputting Technology of High Power Diode Laser Coupling with Optical Fiber

Author: ChenQu
Tutor: DingYingChun
School: Beijing University of Chemical Technology
Course: Condensed Matter Physics
Keywords: High - power semiconductor laser Fiber coupling Beam quality Tapered fiber Bending the fiber
CLC: TN253
Type: Master's thesis
Year: 2010
Downloads: 337
Quote: 3
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Abstract


Its small size, good beam quality, long life and stable performance advantages, fiber-coupled high-power semiconductor lasers as the pump source used in high-power fiber lasers can also be directly applied to the field of laser medical and material processing. To promote the practical application of fiber-coupled high-power semiconductor lasers, in order to improve the performance of high-power semiconductor laser fiber-coupled output, respectively, from the theoretical and experimental research study, the main contents include: 1, Optically the basic theory, the coupling theory and coupled model in detail. Common method of fiber-coupled laser classification and pointed out the advantages and disadvantages of these methods. 2, we introduce fiber shaper external cavity semiconductor laser array phase locked, fiber-coupled semiconductor laser external cavity lock. Experimental compressed spectral width of the output of the semiconductor laser array, and to improve the beam quality of the array output. Tapered optical fiber transmission characteristics of high-power semiconductor laser on various studies, including: light theory, analysis of the relationship between the minimum diameter of the cone of power transmission efficiency. Proposed effective numerical aperture of the method to calculate the efficiency of wave energy transmission. Double-clad fiber for the receiving end, the tapered fiber than effective transmission of high power semiconductor laser light theory. Fused platform design Fused experimental been biconical area, measuring the minimum diameter of the tapered fiber cone and cone length of high power semiconductor laser transmission efficiency. Combined with the characteristics of the tapered fiber cladding pass for experimental research. Experiments using the method of the high-refractive index matching liquid soaking cone area, the measurement of high-power semiconductor laser in a tapered optical fiber transmission process the influence of the fiber cladding on the transmission. These results provide practical work in the high-power beam combiner design and practical application of theoretical and experimental guidance. 4, using the theory of light in the curved fiber, to propose a more convenient non-destructive screening method used to determine the optical fiber coupled semiconductor laser output beam quality. The same time, the experiment measured the same as a difference of the optical fiber coupler of the optical power output of the semiconductor laser output power, the detection fiber coupling efficiency of the semiconductor laser. This research used to improve the fiber laser pumping efficiency and stability, as well as the measurement of the coupling effect of the fiber-coupled semiconductor laser to provide new ideas and theories and experimental basis.

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CLC: > Industrial Technology > Radio electronics, telecommunications technology > Photonics technology,laser technology > Optical waveguide and integrated optics > Fiber optic components
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