We have observed grating-based morphological hole burning in Sm<sup>2+</sup> -doped glass powders at room temperature. When photobleaching on the 4f<sup>6</sup>–4f<sup>5</sup>5d transition of Sm<sup>2+</sup> is combined with multiple light scattering, holes are produced in frequency and wave-vector domains. The hole profile depends on the amount of light absorption of Sm<sup>2+</sup> ; it sharpens as the absorption decreases. The variation of the hole shape is explained theoretically based on a diffusion approximation.
© 2003 Optical Society of America
Koji Fujita, Yoshihiro Ohashi, and Kazuyuki Hirao, "Room-temperature grating-based morphological hole burning in Sm 2+-doped g lass powders," Opt. Lett. 28, 567-569 (2003)