Temperature Effects on the Optical Parameters of a Passively Q-Switched Diode-Side Pumped Yb,Er-Laser
- B. I. Stepanov Institute of Physics of the National Academy of Sciences of Belarus (Belarus)
- V. A. Kotelnikov Institute of Radio Engineering and Electronics of the Russian Academy of Sciences (Fryazino Branch) (Russian Federation)
Temperature effects on photoluminescence and absorption spectra of the active medium (LGS-DE erbium phosphate glass) and passive Q-switch (MgAl{sub 2}O{sub 4}:Co{sup 2+} crystal) of a diode-side pumped Yb,Er-laser are studied. The obtained data are applied to an analysis of the spectral and energetic characteristics of compact erbium emitters. It is established that the dominant generation channel in the temperature range 233–328 K is the optical transition between lower Stark sublevels of Er{sup 3+} states {sup 4}I{sub 13/2} and {sup 4}I{sub 15/2} (λ = 1532.0–1533.9 nm). A rate-equation system taking into account thermal population of Stark sublevels of states {sup 4}I{sub 13/2} and {sup 4}I{sub 15/2} is proposed to describe the experimental temperature dependence of the threshold absorbed power of the pumping radiation. This system and the lasing threshold enable modeling of Yb,Er-emitter output energetic and temporal characteristics.
- OSTI ID:
- 22810127
- Journal Information:
- Journal of Applied Spectroscopy, Vol. 85, Issue 1; Other Information: Copyright (c) 2018 Springer Science+Business Media, LLC, part of Springer Nature; http://www.springer-ny.com; Country of input: International Atomic Energy Agency (IAEA); ISSN 0021-9037
- Country of Publication:
- United States
- Language:
- English
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