Nonvolatile two-color holographic recording in Tm-doped near-stoichiometric LiNbO3

✍ Scribed by Van-Thai Pham; Sun-Kyun Lee; Minh-Tuan Trinh; Ki-Soo Lim; D.S. Hamilton; K. Polgár

• Publisher: Elsevier Science
• Year: 2005
• Tongue: English
• Weight: 174 KB
• Volume: 248
• Category: Article
• ISSN: 0030-4018
• DOI: 10.1016/j.optcom.2004.12.002

✦ Synopsis

We have observed ultraviolet-induced visible absorption and performed two-color holographic recording at green, red, and near-infrared light in thulium doped near-stoichiometric LiNbO 3 crystal. The diffraction efficiency and sensitivity of the recording process at all wavelengths are increased by ultraviolet gating light. Characteristics of recording in the visible are explained by a two-center model. Two-color recording in the near-infrared exhibits significant improvements of the fixed diffraction efficiency and the role of small polarons is discussed in the visible and near-infrared recording with ultraviolet sensitizing light.