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Research on High Power Er3+ /Yb3+-Codoped All Fiber Laser

Author: ZhongFanFan
Tutor: JuYouLun
School: Harbin Institute of Technology
Course: Physical Electronics
Keywords: All-fiber technology Er3 / Yb3 codoped Single packet layer grating Beam quality
CLC: TN248.1
Type: Master's thesis
Year: 2011
Downloads: 44
Quote: 0
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Abstract


The emergence of cladding-pumped technology has brought a revolution in high power fiber lasers, Er 3 / Yb 3 co-doped fiber fiber laser, extended-doped of Er 3 fiber laser pump source choice and avoid concentration quenching effect, to further improve the output power of fiber lasers in the 1.5μm band. High power Er 3 / Yb 3 co-doped fiber laser with good beam quality and high power density, not only for long-distance transmission of communications, can efficiently pump variety of doped Er 3 and Tm-doped 3 crystal, so more and more attention. In theory, the application of Er 3 / the Yb 3 co-doped fiber laser rate equations in the case of high-power steady state power transfer equations, and combining fiber lasers the boundary conditions of the power output function. As the theoretical basis of simulation to determine the optimum length of the optical fiber, and endoscopic reflectance doping concentration, injection pump power and background loss of the positive and negative output power and optimum length. Experiment, the output power characteristics and redshift characteristics used in the LD, in Security Guarantee LD premise to determine optimum pump working condition. On this basis, to build a full fiber facet reflection fiber lasers, access to a 1.5μm-band multi-peak oscillation output, and the slope efficiency of 18.3%. First successful single-clad fiber carved into raster processing nature of the double-clad fiber grating as the input cavity mirror of the laser output fiber end face endoscopic build all-fiber single-grating fiber laser: first obtain a slope efficiency of 22.9%, the maximum output power of 6.3W, line width 36.0pm center wavelength a 1569.7nm single wavelength, narrow linewidth laser; to replace raster and optimization of fiber length to obtain the slope efficiency of 21.3%, the highest The output power of 4.02W, the line width 34.9pm, center the wavelength for 1531.9nm single wavelength narrow linewidth laser. Mainly due to the impact of single-grating laser all-fiber beam quality. Transmitted through communication optical fiber of single-cladding layer of the output terminal of welding, stripping the cladding pump light, the laser and the fluorescent. Successful welding and communication optical fiber doped fiber matching the output laser beam quality factor M 2 improved from 17.2 to 1.82.

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CLC: > Industrial Technology > Radio electronics, telecommunications technology > Photonics technology,laser technology > Laser technology, the maser > Laser > Solid-state lasers
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