Er~(3+) and Yb~(3+) doped phosphate glasses for 'eye-safe' wavelength lasers (λ=1.53/1.55μm)

摘要

The paper present the first stage of researches aiming to elaboration of Er~(3+) and Cr~(3+) ions doped ytterbium-phosphate laser-oriented glasses pumped with flash lamp or with laser diode (λ=970nm) and emitting "eye-safe" radiation (λ=1,54μm) and active fiber-oriented one for amplifiers on wave l,53/l,55μm. Worked out glasses are characterized by low coefficient of thermal expansion (high resistance on thermal shock), do not crystallize or show slight inclination to devitrification in temperatures of fiber forming and possess advantageous rheological characterization. Spectral and spectroscope investigations of glasses show on their usefulness for laser applications. Especially refers this to glasses with simultaneous content Er~(3+)and Cr~(3+) ions giving strong luminescence.