Affiliation:
1. Shanghai Institute of Ceramics
2. University of Chinese Academy of Sciences
3. Shandong Normal University
4. Institute of Low Temperature and Structure Research
5. Jinan University
Abstract
A Tm:SrF2 single crystal is grown by a modified temperature gradient technique (TGT). A study of the fluorescence characteristics and laser performance is carried out. Under laser-diode (LD) end-pumping, a continuous-wave (CW) laser is demonstrated. A slope efficiency of up to 81.8% is first achieved in the Tm-doped single crystals, which is extremely close to the photon quantum efficiency of 2.00. Such a high photon quantum efficiency is caused by the effective cross-relaxation process between Tm3+ ions. A maximum output power of 4.082 W is also obtained. The laser performance indicates that Tm:SrF2 is a promising candidate for highly efficient ∼2 µm lasers.
Funder
National Natural Science Foundation of China
Science and Technology Commission of Shanghai Municipality
CAS Interdisciplinary Innovation Team
Instrument Developing Project of CAS
Subject
Atomic and Molecular Physics, and Optics
Cited by
6 articles.
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