Broadband diode-pumped fibre laser

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We report the observation of a strong dependence of the emission spectrum (centre wavelength and linewidth) of Nd : silica fibre lasers on pump wavelength. In a particular fibre, careful selection of the pump wavelength has led to the operation of a broadband fibre laser at 1060 nm with 19 nm FWHM bandwidth. When pumped with a 30 mW diode laser, it exhibits a 1 mW threshold, a 2.5 mW output, and an intrinsic average wavelength temperature stability of about 10 ppm/°C.


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