The properties of crystals used in solid state masers are discussed. A table is presented summarizing this information for present maser materials. It is pointed out that further material research needs to be done to improve the performance of masers and extend their frequency range.
© 1962 Optical Society of America
Original Manuscript: August 22, 1961
Published: January 1, 1962
Hendrik J. Gerritsen, "Recent Developments in Maser Devices and Materials," Appl. Opt. 1, 37-44 (1962)