[Spectral power distribution and quantum yield of Sm3+-doped bismuth tellurite glass under the excit
[Spectral power distribution and quantum yield of Sm3+-doped bismuth tellurite glass under the excitation of violet LED]
A new method for measuring the spectral power distribution in Sm3+-doped bismuth tellurite glass with higher refractive index and lower phonon energy by using integrating sphere was introduced and designed for the first time. Fluorescence measurement system was constituted by integrating sphere of 10-inch diameter, which was connected to a DDC detector. A standard halogen lamp was used to calibrate the measurement system and the auxiliary standard halogen lamp was employed for collating inner change in integrating sphere. The total radiant flux, total luminous flux and total quantum yield were calculated by luminous flux distribution and photon distribution, which were derived from spectral power distribution, and the values were 55 microW, 0.02 lm and 4.07%, respectively. In the present paper, the integrating sphere-method was applied to measure the luminescence parameters of the multichannel transition emissions in Sm3+, and it was considered as an accurate way to characterize luminescence parameters for luminescence and laser material.
Wang XY, Lin H, Li CM, Yang DL, Tanabe S.
Faculty of Chemical Engineering and Materials, Dalian Institute of Light Industry, Dalian, China.