Spectrum research on the passive mode-locked $$\hbox {Yb}^{3+}$$ Yb 3 + -doped fiber laser

Abstract

In this paper, the spectrum characters of passive mode locked Yb 3+ -doped fiber laser were investigated in detail, tunable four wavelengths with more than 30 nm tuning range, single wavelength, double wavelengths, multi-wavelengths laser output have all been observed in experiment. Moreover, these results were analyzed theoretically.