26 Apr 2019 Er3+,Yb3+ co-doped phosphate glass (Er,Yb:phosphate glass) is a well-known and commonly used active medium for lasers emitting in the “eye-safe” spectral range of 1,5-1,6 μm. Phosphate glass combines long lifetime (~8 ms) of 4I13/2 Er3+ upper laser level with low (2–3 ms) lifetime of 4I11/2Er3+ level that is in resonance with Yb3+ 2F5/2 excited state. Fast non-radiative multi-phonon relaxation from 4I11/2 to 4I13/2level greatly decreases back-energy transfer and up-conversion losses due to interaction between Yb3+ and Er3+ ions, excited at the 2F5/2 and the 4I11/2 levels, respectively.
Main features
- Long lifetime of the 4I13/2 erbium energy level
- High Yb to Er energy transfer efficiency
- High absorption and emission cross-sections
- Wide absorption and emission bandwidths
- Custom crystals available upon request
Application examples
- Passively Q-switched lasers for laser rangefinders, LIDAR and LIBS systems
Contact us
sales@4lasers.com
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