Temperature dependence of the small-signal gain of a Cr3+ and Nd3+ co-doped Y3Al5O12 ceramic. (15th June 2021)

• Record Type: Journal Article
• Authors: Honda, Yoshiyuki; Motokoshi, Shinji; Jitsuno, Takahisa; Fujioka, Kana; Yamada, Toshihiro; Yoshida, Minoru
• Is Part Of: Japanese journal of applied physics. Volume 60:Number 7(2021)
• Publication Date: 2021-06-15
• Subjects: Nd/Cr:YAG -- ceramic laser -- temperature dependence -- energy transfer -- small-signal gain; Physics -- Periodicals; 621.05
• DOI: 10.35848/1347-4065/ac06b3
• Languages: English
• ISSNs: 0021-4922

Abstract

Abstract: There is a demand for higher-efficiency neodymium and chromium co-doped yttrium aluminum garnet (Nd/Cr:YAG) ceramics that can be excited by broadband light sources, such as flash lamps. We experimentally investigated the temperature dependence of the gain coefficient of a Nd/Cr:YAG ceramic (Nd: 1.0 at%, Cr: 2.0 at%). The gain coefficient at 1064 nm decreased with increasing temperature when Nd 3+ was directly excited at 808 nm. However, when Nd 3+ was excited via energy transfer from Cr 3+ excited at 610 nm, the gain coefficient increased with increasing temperature. This temperature dependence was theoretically explained by solving the rate equations for Nd/Cr:YAG. Nd/Cr:YAG ceramics pumped with flash lamps may provide good laser performance without loss of gain even at high temperatures.