Transient gain dynamics in saturated Raman amplifiers

Dual Stage Ytterbium Doped Fiber Laser in MOPA Configuration

“…Fig. (4) shows that the measured values are very similar to the simulation results obtained by using the "reservoir" model of the amplifier, already utilized in literature to describe the amplification dynamics [21][22][23]. Fig.…”

Fast and Efficient Dynamic WDM Semiconductor Optical Amplifier Model

“…The predictions of the reservoir model will be accurate whenever the carrierinduced XGM mechanism dominates over FWM and XPM. It is worth mentioning that state-variable amplifier block diagrams are very important simulation tools that enable the reliable power propagation of WDM signals in optical networks with complex topologies; therefore, the present reservoir SOA model provides a new entry aside from the already known models for EDFAs [21], [25] and for Raman amplifiers [26]. A challenge in our reservoir model, as in all simplified SOA models, is to correctly choose the values of the wavelength-dependent coefficients that give the best fit to the experimental results.…”

A note on the stability of single frequency laser diode models

“…• Gain φ should (strictly) increase with carrier density without rolling off, as stated in assumption (15). For low carrier densities, the gain should be negative, and should increase through zero at some transparency carrier density, as stated in assumption ( 16).…”

“…Another application of modulated laser diodes for which it is desirable to understand stability is their use as pump sources for Raman amplification [14,15]. Stable operation at relatively high speed modulation for very high power diodes is required for transient suppression in Raman amplifiers, particularly for the case of co-propagating signal and pump operation.…”