Bridgman growth and characterization of Dy:YCa4O(BO3)3 crystal

A 1-inch Dy3+ : YCa4O(BO3)(3) single crystal has been grown by the Bridgman method. The segregation coefficient of Dy3+ is 0.784. The structures, thermal and optical properties of Dy3+ : YCOB crystal was studied. The results show that the Dy3+ : YCOB crystal has high transmittance, specific heat and thermal diffusion coefficient. The Yaxis-oriented Dy3+ : YCOB crystal has the largest absorption cross-section sigma(abs) (0.85x10(-21)cm(2)@444nm) and emission cross-section sigma(em) (2.54 x 10(-21)cm(2)@585nm). In addition, the J-O intensity parameters Omega(t)(t = 2, 4, 6) of the Dy3+ : YCOB crystal were calculated, where Omega(2), Omega(4), Omega(6) are 5.01x 10(-20)cm(2), 0.33x 10(-20)cm(2), 0.52 x 10 20cm(2) respectively. The fluorescence branching ratio ss is 78.7%, and the radiative lifetime tau(rad) is 1.588 ms. The fluorescence lifetime tau(f) is 384.47 mu s at 585 nm. The above data confirms that the Y-axis-oriented Dy3+ : YCOB crystal is a good yellow laser gain material, which has potential application value in the field of yellow laser operation.

Automated summary

The Dy3+ : YCOB crystal exhibits high transmittance, specific heat, and thermal diffusion coefficient. The Y-axis-oriented Dy3+ : YCOB crystal has the largest absorption and emission cross-sections. The fluorescence lifetime and emission cross-section make it suitable for yellow laser operation.