Crystal growth and spectral properties of Sm:GGG crystal

Growth and spectroscopic properties of Sm3+ doped Na3La9O3(BO3)8 crystal

“…The spectral parameters of 4 G 5/2 to 6 H 5/2 , 6 H 7/2 , and 6 H 9/2 transitions in Sm:NLBO were presented in Table 3. For comparison, the spectral parameters of other Sm 3+ doped rare-earth crystals [1][2][3][4][5][6][7][8][9] are also summarized in Table 3. Obviously, Sm:NLBO has a large emission cross-section (7.248 Â 10 À21 cm 2 ) at 601 nm, which is much larger than that of other Sm 3+ doped crystals except for Sm:GdVO 4 [9] whose dominant emission is not in the region of 580-620 nm.…”

“…Orange-red lasers in the wavelength range of 580-620 nm have important applications in iatrology, astronomy, telecommunication, remote sensing, and color displays [1,2]. In the past there were few reports about the generation of orange-red lasers pumped directly by a light source because of the insufficient absorption properties for optical pumping with classical lamps [3].…”

“…This shortcoming can be overcome at near future with the rapid development of high power laser diodes (LDs) emitting 405 nm blue light. Therefore it is an urgent task to develop novel orange-red laser materials which can be pumped directly by 405 nm LDs [1,3]. In rare earth ion Sm 3+ doped laser crystals, there is an emission of the 4 G 5/2 -6 H 7/2 transition at about 600 nm in the orange-red range when pumped by 405 nm LDs [1,4].…”

“…Therefore it is an urgent task to develop novel orange-red laser materials which can be pumped directly by 405 nm LDs [1,3]. In rare earth ion Sm 3+ doped laser crystals, there is an emission of the 4 G 5/2 -6 H 7/2 transition at about 600 nm in the orange-red range when pumped by 405 nm LDs [1,4]. Furthermore, the large energy between 4 G 5/2 and a next lower-lying state is up to 7000 cm À1 , which would result in a negligible nonradiative multiphonon relaxation and an efficient orange-red luminescence with a low laser threshold [1,3].…”

“…Recently, the spectroscopic investigations of Sm 3+ doped La 2 CaB 10 O 19 (LCB) [5], YAlO 3 (YAP) [6], YAl 3 (BO 3 ) 4 (YAB) [7], YCa 4 O(BO 3 ) 4 (YCOB) [8], Gd 3 Ga 5 O 12 (GGG) [1,3], and GdVO 4 [9] crystals have been reported. Na 3 La 9 O 3 (BO 3 ) 8 (NLBO) is a promising borate nonlinear optical crystal with excellent optical properties, such as a large nonlinear optical coefficient, a wide transparency range, and a moderate birefringence.…”