The spectral properties of a diode-pumped Yb:Y> 2O3 ceramic laser are reported. We show experimentally that the instantaneous emission wavelengths of the laser change randomly with time, whereas its emission has fixed well-defined transverse modes. The central wavelength of the laser emission also shifts prominently with the increase of intracavity light intensity. It is found that the spectral properties of the laser can be explained well based on the strong reabsorption of light in the gain medium.
© 2004 Optical Society of America
J. Kong, D. Y. Tang, J. Lu, and K. Ueda, "Random-wavelength solid-state laser," Opt. Lett. 29, 65-67 (2004)