Effects of external perturbations on LiNdP4O12lasers

Resonance-like behaviors and spiking oscillations were observed in the LiNdP4O12(LNP) laser by placing a moving light scattering object across the output beam. Intensity fluctuations, corresponding to relaxation oscillations, were observed when the LNP laser light beam was coupled to an optical modulator as well as to an optical fiber. Classical rate equations, including a loss modulation term, were given to explain the observed phenomena. All the intensity fluctuations due to external perturbations were found to be completely suppressed by using a YIG Faraday rotation optical isolator.