期刊
SOLID STATE LASERS XXXI: TECHNOLOGY AND DEVICES
卷 11980, 期 -, 页码 -出版社
SPIE-INT SOC OPTICAL ENGINEERING
DOI: 10.1117/12.2610330
关键词
gallium garnets; disordered crystals; holmium ions; diode-pumped lasers; tunable laser operation
类别
资金
- [PID2019-108543RB-I00]
- [MCIN/AEI/10.13039/501100011033]
This study compares the properties of three different doped calcium niobium gallium garnet crystals and finds that the crystal with added Li+ and La3+ cations exhibits good performance in laser generation and can achieve a wide tuning range of wavelengths.
A comparative study of three disordered calcium niobium gallium garnet (CNGG)-type crystals codoped with Tm3+ and Ho3+ ions is performed: (i) without host modifiers (CNGG), (ii) with Li+ cations added (CLNGG), and (iii) with Li+ and La3+ cations added (LCLNGG), all grown by the Czochralski method. The crystals exhibit inhomogeneously broadened luminescence bands extending beyond 2.1 mu m. A diode-pumped Tm,Ho:LCLNGG laser generates 562 mW at 2082 nm with a slope efficiency of 17.4% and a laser threshold of 0.46 W. A continuous wavelength tuning between 1904.1 and 2121.1 nm (tuning range: 217 nm) is achieved with this new garnet compound. The Tm,Ho:LCLNGG crystal is promising for generation of ultrashort pulses from mode-locked lasers emitting above 2 mu m.
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