Hybrid femtosecond fiber laser outcrossing Er-doped fiber and Yb-doped fiber

Abstract

A hybridized scheme of a fiber femtosecond pulse laser was devised with the aim of grafting the frequency comb of an Er-doped fiber oscillator, stabilized around a 1.550 mu m center wavelength, onto the 1.0 mu m emission range of an Yb-doped fiber amplifier. Test results showed that the frequency comb is successfully transferred to a new 1.034 mu m center wavelength with a spectral bandwidth of 21 nm, upholding an original frequency stability of 3.71 x 10(-13) at 10 s averaging. This work demonstrates the feasibility of outcrossing different kinds of fibers to shift the spectral range of the frequency comb over a large operating span without loss of stability.