Experimentally verified modeling of erbium-ytterbium co-doped DFB fiber lasers

Abstract

Abstract-For the first time, the simulation results of fiber distributed feedback (DFB) lasers are compared against experimental data in this paper. The pump source, active medium, and grating are all modeled and simulated to predict actual laser characteristics. Simple characterization methods are illustrated for the measurement of model parameters. Large loss at the pump wavelength is observed, attributed to the lifetime quenching of Yb ions, and included in the model as a critical parameter. DFB lasers with two different apodization profiles successfully simulated with the same set of model parameters.

The ultra-weak feedback effect of DBR fiber laser and its sensing applications

“…A 21 is the Einstelin coefficient. [8] The rate equations should be equal to zero at the steady state, and the solution is shown in Fig.1(a). When the pump power is 450mW, the dynamic solution of the equations is shown in Fig.1 scattering in the single mode fiber will have a feedback to the DBR fiber laser.…”

Improved design of a DFB Raman fibre laser

“…To solve equations (1)- (3), we used a fourth-order implicit Runge-Kutta algorithm as proposed in [11]. As we were interested in the CW response of the grating we took A p (0,t)=A 0 where A 0 is the constant Raman pump power and solved the coupled mode equations for both the output power and the mode profile.…”

Fabrication of erbium-ytterbium distributed multi-wavelength fiber lasers by writing the superstructured fiber Bragg grating resonator in a single writing laser scan

“…One cause for this tilt is the lack of pump at the end of the grating resulting from the very high pump loss in the Er-Yb fiber. Ytterbium lifetime quenching [12], cooperative up-conversion [12] and UV-induced erbium lifetime quenching [13] could explain this high loss, but the relative importance of these mechanisms is still unknown. The second cause of the tilt is the loss caused by coupling to cladding modes because the outputs of short wavelength lines are passing through the long wavelength part of the SC-FBG.…”