T. Tsuboi et al., LUMINESCENCE OF LIF-F(2)(+)CRYSTAL EXCITED WITH EVANESCENT FIELD AND ITS APPLICATION TO FIBEROPTIC AMPLIFICATION, Journal of luminescence, 72-4, 1997, pp. 1022-1023
F-2(+) color center in LIF crystal superstrate deposited on polished
fiber through an immersion-liquid overlay was excited with evanescent
field of 632.8 nm radiation which was entered to the fiber, giving ris
e to the F-2(+) luminescence. Amplification of 920 nm radiation trans
ferred from the fiber to the overlay was demonstrated.