We have just published a new theoretical model including frequency interaction and mode competition in random lasing which allows to predict resonance-driven tuning of random lasing. As it builds on solid previous models, we believe that it could be of practical use to predict the behavior of your random lasing system. If you are interested in the code just contact us.
Tuning random lasing in photonic glasses
We present a detailed numerical investigation of the tunability of a diffusive random laser when Mie resonances are excited. We solve a multimode diffusion model and calculate multiple light scattering in presence of optical gain which includes dispersion in both scattering and gain, without any assumptions about the β parameter. This allows us to investigate a realistic photonic glass made of latex spheres and rhodamine and to quantify both the lasing wavelength tunability range and the lasing threshold. Beyond what is expected by diffusive monochromatic models, the highest threshold is found when the competition between the lasing modes is strongest and not when the lasing wavelength is furthest from the maximum of the gain curve.
PDF available here: Tuning random lasing in photonic glasses