The mechanism of resonant diffraction in solid-state lasers is theoretically investigated and experimentally isolated. It consists in a variation of the diffraction losses of a laser with the laser frequency, which is induced by a frequency-dependent saturation lenslike effect that occurs in the active medium. It is shown that this mechanism can lead to peculiar variations in the laser slope efficiency. The diffracted-light spectroscopy technique permits these variations to be connected with the calculated saturation lenslike effects in a diode end-pumped Er,Yb:glass laser.
© 2001 Optical Society of America
(050.1940) Diffraction and gratings : Diffraction
(140.3410) Lasers and laser optics : Laser resonators
(140.3500) Lasers and laser optics : Lasers, erbium
(140.3570) Lasers and laser optics : Lasers, single-mode
(140.3580) Lasers and laser optics : Lasers, solid-state
Mehdi Alouini, Albert Le Floch, Marc Vallet, Marc Brunel, Guy Ropars, and Fabien Bretenaker, "Resonant diffraction losses in solid-state monomode lasers," J. Opt. Soc. Am. B 18, 780-784 (2001)