Abstract.
Yb:Ca4YO(BO3)3 (Yb:YCOB) crystal with good quality and large size has been grown by the Czochralski method. The polarization absorption and fluorescence spectra have been measured. The laser action of the Yb:YCOB crystal has been demonstrated when it is pumped by a fiber-coupled laser diode (LD) at the wavelength of 976.4 nm. The pumping threshold is 55 mW, the light-light conversion efficiency is 58.7%, and a slope efficiency of up to 73% is thus calculated.
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Received: 16 December 1998 / Revised version: 4 February 1999 / Published online: 7 April 1999
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Zhang, H., Meng, X., Wang, P. et al. Slope efficiency of up to 73% for Yb:Ca4YO(BO3)3 crystal laser pumped by a laser diode . Appl Phys B 68, 1147–1149 (1999). https://doi.org/10.1007/s003400050759
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DOI: https://doi.org/10.1007/s003400050759