Kinetics of generation in glass fiber lasers

Generation kinetics of a neodymium glass fiber laser emitting periodic giant pulses are experimentally and theoretically studied. The role of color centers arising in glass due to the short wavelength part of the pumping tube radiation spectrum in the Q-self-modulation process is demonstrated. Results indicate that short-living color centers arising due to the violet part of the pumping spectrum result in an automodulation mode of neodymium glass fiber laser generation with emission of periodic giant pulses. The temperature dependence of color center lifetime in glass is determined, and the automodulation mode of generation is most strongly expressed at glass fiber temperatures of 250-300 K.