Producing layered penta-ultraphosphate monocrystals

摘要

Monocrystalline substrates of gadolinium yttrium penta- ultraphosphate are coated with an epitaxial layer of neodymium yttrium penta- ultraphosphate to produce a wave guiding, laser active, solid state devices. The preparation procedure involves heating a solution of neodymium oxide and yttrium oxide in phosphoric acid to about 500° C. with holding points being interposed at about 180° C. and at about 370° C. After the solution has been held at 500° C. for about 12 through 15 hours, a preformed substrate monocrystal of gadolinium yttrium penta-ultraphosphate is introduced thereinto and a layer of monocrystalline neodymium yttrium penta-ultraphosphate is grown thereon.