A dual-wavelength cladding- pumped Er3+/Yb3+ codoped fibre laser system with more than 2 W output and tunable wavelength spacing

摘要

A dual-wavelength laser system with wideband tunable wavelenght spacing and more than 2W output power is proposed and demonstrated/ The operation principle of the laser system is based on the saturation gain characteristic of a cladding-pumped Er3+/Yb3+ co-doped fibre amplifier combining with a wideband tunable fibre laser with flat power spectrum/ The tuning range of the wavelength spacing is continuous within a 35 nm spectral range, and the power difference between both lasing wavelengths can be easily adjusted and controlled by a variable optical attenuator. The total output can approximately keep unchangeable when the wavelength spacing and the power difference between both lasing wavelengths are continously tuned and changed. The maximum total output power of the laser system is about 2.22 W.