Optical divider for multimode optical fiber systems

Abstract

Abstract An optical divider for multimode optical fibers of graded-index (GI) type composed of an optical input section for securing input optical fiber, a branching section including an optical waveguide having rectangular sectional shapes irrespective of a kind of material or a method of fabricating the same and consists of a main optical waveguide and branch waveguide, and an optical output section for securing an array of output optical fibers, wherein the main optical waveguide having a width D and a length M is divided contiguously into N branch optical waveguides, preferably three or more having uniform width W, the optical waveguide having substantially uniform core thickness T is specifically related with the core diameter K of the otpical fiber to fufull the following relational formulas: 0.7≦T/K≦0.85 (1) 0.35≦W/K≦0.80 (2) 15≦M/D≦70 (3) D=N×W (4) for reducing a coupling loss between the optical fibers and the optical waveguide and improved a loss variance by selecting the value of M/D to the value within the range as specified above or more preferably within a range of 20≦M/D≦60.

Inventors

• 👤 Mitsuzo Arii
• 👤 Norio Takeda
• 👤 Shigeo Kataoka
• 👤 Osamu Kondoh
• 👤 Kuniaki Jinnai
• 👤 Hisashi Ohwada
• 👤 Tomoko Kondoh

Bibliographic Details