Abstract: Li.sub.4 Ge.sub.5 O.sub.12 activated by a closed shell ion such as Ti.sup.+4 or Sn.sup.+4 as the active medium for a solid state laser that emits in the blue-green region of the visible spectrum.

Abstract: The invention relates to a two step method of manufacturing a magnetically switchable magneto-optic element comprising compressed bismuth-containing garnet film of low anisotropy field value deposited on a monocrystalline gadolinium garnet substrate. The first step involves growing a compressed bismuth-containing garnet film having a growth and strain induced effective anisotropy field of about 3000 gauss or less on a monocrystalline gadolinium garnet substrate. The second step involves reducing the anisotropy field of the resulting garnet film to a predetermined lower anisotropy field by ion implantation.

Abstract: The invention relates to a magnetically switchable magneto optic composite comprising an epitaxial film supported on a non-magnetic garnet substrate. The film is a bismuth-containing film which is in compression, contains a combination of cations providing a net negative magneto-strictive coefficient, has a positive value anisotropy field, a low collapse field and high figure of merit. The film is easily switchable utilizing z-y coincident drive lines and the composite can readily be formed into a chip comprising an array of switchable optically active pixels. Also disclosed are light valves, optical printers, microwave signal processors and magneto-optic light deflectors comprising the described magneto-optic light composites.