THE CW MODELESS LASER - MODEL-CALCULATIONS OF AN ACTIVE FREQUENCY SHIFTED FEEDBACK CAVITY

The modeless laser is a cw laser device which lacks frequency domain mode structure as a result of frequency shifted feedback. We introduce a model to describe this system and use it to compute the output versus pump power characteristics and spectra. The evolution of the modeless spectrum from quantum noise is also studied. The behaviour described by this model differs from that of a conventional laser and can be attributed to the introduction of a new parameter; the intra-cavity frequency shift. The model provides valuable physical insight into the system and, moreover, permits system design.