Polarized spectral properties and laser operation of Nd:SrAl12O19 crystal

Yuxin Pan (1) , Bei Liu (1) , Jian Liu (2) , Qingsong Song (1) , Jie Xu (1) , Dongzhen Li (1) , Peng Liu (1) , Jie Ma (1) , Xiaodong Xu (1) , Hui Lin (3) , Jun Xu (2) , Kheirreddine Lebbou (4)

1 School of Physics and Electronic Engineering
2 Tongji University
3 University of Shanghai for Science and Technology
4 iLM - LUMINESCENCE - iLM - Luminescence

Nd:SrAl11O19 (Nd:SRA) crystal has been grown by the Czochralski method. Polarized absorption spectra, polarized fluorescence spectra and fluorescence lifetime were investigated. For σ-polarization, the peak absorption cross section at 798 nm is 2.08 × 10−20 cm2 with full width at half maximum (FWHM) of 10.2 nm and the peak emission cross section is 3.36 × 10−20 cm2 at 1048.5 nm with FWHM of 4.80 nm. The Judd-Ofelt parameters Ω2,4,6 were obtained to be 0.51 × 10−20 cm2, 2.08 × 10−20 cm2, and 2.12 × 10−20 cm2, respectively. Continuous-wave laser operation of the a-cut and c-cut Nd:SRA sample has been demonstrated. The maximum output power of 8.33 W was achieved from c-cut sample at an absorbed power of 27.73 W, corresponding to a slope efficiency of 31.3%.

Mots clés: Nd:SRA; Czochralski method; Judd-Ofelt theory; Continuous-wave laser

Domaines: Science des matériaux [cond-mat.mtrl-sci]; Optique [physics.optics]

Yuxin Pan, Bei Liu, Jian Liu, Qingsong Song, Jie Xu, et al.. Polarized spectral properties and laser operation of Nd:SrAl12O19 crystal. Journal of Luminescence, 2021, 235, pp.118034. ⟨10.1016/j.jlumin.2021.118034⟩. ⟨hal-03227707⟩