Journal
LASER PHYSICS LETTERS
Volume 11, Issue 11, Pages -Publisher
IOP PUBLISHING LTD
DOI: 10.1088/1612-2011/11/11/115803
Keywords
laser materials; solid-state laser; rare-earth-doped materials; heat conduction
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Funding
- State Key Program for Basic Research of China [2010CB630703]
- National Natural Science Foundation of China [51302283, 61138006]
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Nd-doped LiLuF4 crystal was grown by the traditional Czochralski method. Room-temperature polarized spectroscopic characteristics of Nd3+ ions in LiLuF4 crystal were investigated. The maximum emission cross-sections are 5.45 x 10(-20) cm(2) at 1320 nm and 2.34 x 10(-20) cm(2) at 1313 nm for pi-polarization and sigma-polarization, respectively. The thermal expansion coefficient, specific heat, thermal diffusion coefficient and the thermal conductivity of Nd:LiLuF4 crystal were systematically studied, which, to the best of our knowledge, is the first time for this crystal thus far. Laser operation in an Nd: LiLuF4 single crystal at 1314 nm with laser-diode pumping was demonstrated. We obtained 3.7 W output power at 1314 nm with a slope efficiency of near 32%. The results of our study indicate that Nd:LiLuF4 crystal is a very promising crystal for application as a high-peak power laser.
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