Persistent spectral hole burning has been observed at 77 K, 180 K, and room temperature for Eu<sup>3+</sup> in sodium aluminosilicate glass melted under a reducing atmosphere. In particular, room-temperature persistent spectral hole burning is reported for the first time to our knowledge in Eu<sup>3+</sup> -doped materials. The persistent hole is accompanied by no antiholes and lasts for 1 h at least. The thermal stability of the hole is greater than that of a persistent hole burned for Eu<sup>3+</sup> in sodium aluminosilicate glass melted in air.
© 1998 Optical Society ofAmerica
(120.6780) Instrumentation, measurement, and metrology : Temperature
Koji Fujita, Katsuhisa Tanaka, Kazuyuki Hirao, and Naohiro Soga, "Room-temperature persistent spectral hole burning of Eu3+ in sodium aluminosilicate glasses," Opt. Lett. 23, 543-545 (1998)