Optical multiplexer and demultiplexer

Abstract

Abstract PURPOSE:To reduce a loss, and also to simplify an assembling work by installing an interference film filter to the end face containing an optical fiber branch point of a glass rod formed as a composite optical waveguide by embedding a branch optical fiber, and combining and coupling plural rods. CONSTITUTION:Rays of light having wavelengths of lambda1 and lambda2 is made incident from an optical fiber 1 of a glass rod 2, and the light of lambda2 and the light of lambda1 are made to demultiplex to a glass rod 3 and a glass rod 4, respectively, by an interference film filter 6. In case of multiplexing said rays, on the contrary, the rays of lambda2 and lambda1 of the respective optical fibers 1 of the glass rod 3 and 4 are made incident, by which the light of both the wavelengths lambda1, lambda2 are multiplexed and emitted from the optical fiber 1 of the glass rod 2. The glass rod 2 and 3 are coupled at an angle theta, hold an angle of theta/2 with the end face of the coupled body, and the glass rod 4 is coupled through the interference film filter 6.

Inventors

• 👤 Soichi Kobayashi
• 👤 壮一 小林

Bibliographic Details