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- W2364171806 abstract "A dielectric binary transmission grating coupler with two grooves per period,defined by different line-widths and two depths is applied to side-pumping high-power double-clad fiber lasers.This kind of doubly grooved and doubly depths dielectric grating coupler can be fabricated directly on inner clad of double-clad fiber so that it can be used for high-power laser pumping.By combining a gradient algorithm (quasi-Newton methods) and micro-genetic algorithm,the grating is optimized and the maximum coupling efficiencies of 81.2% and 79.7% for TM and TE polarization waves respectively are demonstrated,and for an unpolarized pump light beam,72.4% efficiency can be reached.In all cases the highest achieved coupling efficiencies require that the refractive index of the grating material should be greater than 1.8.Meanwhile,the fabricatin-error of the grating coupler γ and the impact on coupling efficiency of the wavelength of LD-array λ and incident angle θ are also analyzed." @default.
- W2364171806 created "2016-06-24" @default.
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- W2364171806 date "2008-01-01" @default.
- W2364171806 modified "2023-09-25" @default.
- W2364171806 title "Transmission grating coupler for side-pumping high-power double-clad fiber lasers" @default.
- W2364171806 hasPublicationYear "2008" @default.
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