Production of optical wavelength converting element

Abstract

Abstract PURPOSE:To enable substantially long formation of an org. nonlinear optical material constituting optical waveguides in a single crystal state by filling a crystalline org. nonlinear optical material into the space between substrates and melting the crystalline optical material in a furnace, then drawing the substrates to the outside of a furnace. CONSTITUTION:Plural grooves 6a, 6b, spaced from each other are juxtaposed on at least one surface of two sheets of the substrates 5a, 5b. These substrates 5a, 5b, with the surfaces on one side being faced inside, are fixed to each other in such a manner that the substrates face each other via a slight space held therebetween. The crystalline org. nonlinear optical material such as MNA (2-methyl-4-nitroaniline) having the higher refractive index than the refractive index of the substrate material is filled into the space and thereafter, the substrates 5a, 5b are drawn gradually from the furnace inside kept at the temp. higher than the m.p. of the optical material to the surface outside kept at the temp. lower than the m.p. The optical material in the molten state is thus crystallized from the part drawn to the outside of the furnace. The extremely long optical waveguides consisting of the optical material in the single crystal state are thereby formed.

Inventors

• 👤 Shinsuke Umegaki
• 👤 真祐 梅垣

Bibliographic Details