Preparation of waveguide type optical parts using organic crystal

Abstract

Abstract PURPOSE:To prepare titled parts which hardly deteriorate with the lapse of time by fashioning a case having >=1 planes on the outside surface, growing a single crystal of an org. crystal from a melt or soln. in the hole of the case and using the formed crystal part as a core or clad of an optical waveguide. CONSTITUTION:A square hole is bored by laser beam processing to a square quartz glass material and the square material having such hole is stretched by a carbon resistance heating furnace to form a capillary while the outside diameter is monitored. An MNA melted at 135 deg.C is filled into the capillary and is crystallized by cooling down to a room temp. so as to be fixed in the capillary. The org. crystal in the square capillary is grown to the single crystal by a zone melt method using a CO2 laser or zone melt method to be executed in the resistance heating furnace having a temp. distribution. The damage of the crystal during and after the formation and the positional collapsion by oscillation are thereby obviated and the waveguide difficultly deteriorate with the lapse of time even if the crystal is chemically unstable.

Inventors

• 👤 Akira Tomaru
• 👤 暁 都丸
• 👤 Sakae Maebotoke
• 👤 栄 前佛
• 👤 Toshikuni Kaino
• 👤 戒能　俊邦

Bibliographic Details