Abstract

This work reports the generation of an optical-power tunable 1 μm dual-wavelength fiber laser in ${\mathrm{Nd}}^{3+}/{\mathrm{Yb}}^{3+}$ co-doped phosphate glass fiber under 970 nm and 808 nm laser diode pumping. A bidirectional free-space pump laser setup was adopted. An optical-power tunable dual-wavelength laser can be easily realized by the control of 808 nm pump power magnitude. Based on a series of laser tests under different pump conditions and theoretical calculation of the ${\mathrm{Nd}}^{3+}\to {\mathrm{Yb}}^{3+}$ energy transfer efficiency, the control mechanism was found to be the stimulated emission modulation of ${\mathrm{Nd}}^{3+}$ on ${\mathrm{Yb}}^{3+}$ lasing. This property is helpful to enhance the knowledge of the ${\mathrm{Nd}}^{3+}/{\mathrm{Yb}}^{3+}$ co-doping system.

© 2017 Optical Society of America

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