| Reference |
A. Polman: Exciting erbium-doped planar optical amplifier materials In: Thin Films for Optical Waveguide Devices and Materials for Optical Limiting, Symposia held November 30-December 3, 1999, Boston, MA, U.S.A. /ed. K. Nashimoto, Pittsburgh: MRS, 2000. - pp. 3-14 |
