Search

LiB[sub 3]O[sub 5] crystals were irradiated with MeV He[sup +] ions of different fluences and energies. The refractive index profiles, n[sub x], n[sub y], and n[sub z] in LiB[sub 3]O[sub 5] waveguides are given. The results show that: (1) the thickness of the ion irradiated waveguides can be estimated by the mean projected range of irradiated ions, and the refractive index changes in ion irradiated waveguides are mainly caused by nuclear collisions; (2) after annealing at 200 °C for 40 min., the height of the optical barrier in the LiB[sub 3]O[sub 5] waveguide is decreased; (3) the attenuation measured is 0.87 dB/cm for m = 0 in the LiB[sub 3]O[sub 5] waveguide irradiated with 2.8 MeV He[sup +] to 5 × 10[sub 16] ions/cm²; and (4) it is possible to make double waveguides in LiB[sub 3]O[sub 5] by MeV He[sup +] ion irradiation. [ABSTRACT FROM AUTHOR]