Characterization of Stark components and peak emission cross sections of intermanifold and inter-Stark transitions of Nd3+ in Ba0.25Mg2.75Y2Ge3O12

Abstract

The Stark components of the lower-lying manifolds of Nd 3ϩ in Ba 0.25 Mg 2.75 Y 2 Ge 3 O 12 have been characterized using the well-resolved emission spectra for the 4 F 3/2 → 4 I 9/2 and 4 F 3/2 → 4 I 11/2 transitions at 300 K. The emission cross sections of these intermanifold transitions as well as the inter-Stark transitions of R 1 →X 5 at 940.4 nm and of R 2 →Y 3 at 1061.8 nm have been determined. Finally, these results are compared with those of the standard laser host, Nd:YAG, and the potential of Nd:BAMGAR as a laser host is discussed.

Temperature dependencies of linewidths, positions, and line shifts of spectral transitions of trivalent neodymium ions in barium magnesium yttrium germanate laser host

“…1 and identified as R 2 →Y 3 in Fig. 2, have been measured at ten different temperatures ranging from 10 to 300 K. Figure 3 portrays the R 1 →X 5 and R 2 →Y 3 inter-Stark transitions within the 4 F 3/2 , 4 I 9/2 , and 4 I 11/2 intermanifolds of Nd 3ϩ ions in BAMGAR at 300 K. 6 According to the ion-phonon interaction theory, 8-10,12-16 the linewidths of the R 1 →X 5 and R 2 →Y 3 inter-Stark transitions arise from the crystal strain inhomogeneity, direct onephonon processes, multiphonon processes, and Raman phonon scattering processes. As the crystal temperature increases, the spectral line widths increase.…”

“…A thorough spectroscopic investigation has been performed by the authors on the trivalent neodymium ions doped in barium magnesium yttrium germanate, Ba 0.25 Mg 2.75 Y 2 Ge 3 O 12 ͑BAMGAR͒:Nd 3ϩ , a garnet structured host, and it has been shown that this material possesses many excellent spectroscopic and laser characteristics. 5,6 A detailed characterization of the lower-lying inter-Stark energy levels of Nd 3ϩ ions in BAMGAR has also been performed. 6 Laser action was achieved in Nd 3ϩ :BAMGAR at 1061.8 nm at room temperature.…”

“…5,6 A detailed characterization of the lower-lying inter-Stark energy levels of Nd 3ϩ ions in BAMGAR has also been performed. 6 Laser action was achieved in Nd 3ϩ :BAMGAR at 1061.8 nm at room temperature. 7 Although, for laser action, the thermal broadening and shift of the laser line profoundly affect the light amplification gain, output frequency stability, and thermal tunability of the laser, no studies have been performed yet on the thermal effects on the shift and width of the sharp emission lines of Nd 3ϩ ions in BAMGAR host.…”

Site-selective study of Nd3+ optical centers in Ca3Sc2Ge3O12 laser garnet crystals

“…[1][2][3][4][5][6] Their relatively broad absorption and emission bands make these materials particularly suitable for diode pumping and tunable laser operation. These bandwidths are mainly related to the distribution of optically active ions in a number of slightly different host sites due to the effect of intrinsic structural disorder or charge compensation mechanisms.…”