F. Mougel et al., CW blue laser generation by self-sum frequency mixing in Nd : Ca4GdO(BO3)(3) (Nd : GdCOB) single crystal, OPT MATER, 13(3), 1999, pp. 293-297
We report here the first evidence of blue light generation in a Nd:Ca4GdO(B
O3)(3) (Nd:GdCOB) crystal by self-sum frequency mixing. More than 1 mW of c
w 465 nm laser emission was achieved with 490 mW of absorbed pump power fro
m a titanium sapphire laser (829.6 nm). The blue emission is nearly TEM00,
and the laser threshold is very low (a few mW). The performance should be i
mproved by the use of antireflection-coated crystals and suitable mirrors.
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