I have a problem with the transient response of a DFB laser using the TWLM element. I try to reproduice the response of a DFB laser with parameters took from the reference  (as you can see down below), that’s look like the right figure:
So here is my current circuit with a OOSC_1 to visualize its transient response.
But, as you can see on the right, I get a very noisy response that I still can’t understand. However, the model should technically give the same output as the paper one since it’s also simulate a TD-TWM.
my concern is to know if there is an error in the definition of my parameters in the TWLM element.
Thank in advance for your help.
M. M. Bouchene and R. Hamdi, ‘The effect of facets reflectivity on the static characteristics of (DFB) semiconductor laser’, in 2018 International Conference on Electrical Sciences and Technologies in Maghreb (CISTEM) , Oct. 2018, pp. 1–4