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26 February 2013 Novel Y2O3-codoped Yb/Tm-doped picosecond fiber laser
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We demonstrate the novel picosecond mode-locked Y2O3-codoped Yb/Tm-doped fiber lasers, operating at 1950 nm and producing pulses of up to 1 nJ energy, using a SESAM and an Er-doped pump fiber laser operating at the wavelength 1590 nm or a semiconductor pump laser operating at the wavelength of 1560 nm. We also report on the spectroscopic characterization of these new fibers with various compositions, identifying the optimum one for the maximum Yb/Tm energy transfer, the latter increasing with the increase of the Y concentration. The observed energy transfer between Yb and Tm makes this laser promising also for direct diode-pumping with most advanced and low cost 975 nm diodes, making this laser attractive for compact low cost picosecond Tm-doped fiber laser systems.
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Vladislav V. Dvoyrin, Dmitry Klimentov, Arindam Halder, Mukul C. Paul, Mrinmay Pal, Shyamal K. Bhadra, Alexander V. Kir'yanov, and Irina T. Sorokina "Novel Y2O3-codoped Yb/Tm-doped picosecond fiber laser", Proc. SPIE 8601, Fiber Lasers X: Technology, Systems, and Applications, 86012X (26 February 2013);

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