Dummy unit for optical fiber cable

Abstract

Abstract PURPOSE:To decrease the strain to be exerted to an optical fiber by using a stretched polyoxymethylene having a negative coefft. of linear expansion and high modulus of elasticity as a main material to constitute a dummy unit for an optical fiber cable. CONSTITUTION:The stretched polyoxymethylene 8 is formed to a pipe shape. Since the stretched polyoxymethylene has the negative and small coefft. of linear expansion and high modulus of elasticity, the coefft. of linear expansion of the cable core can be decreased. The elasticity of the stretched polyoxy methylene changes with stretching magnifications and the stretched polyoxymethylene having 20-60GPa is applicable. The coefft. of linear expan sion in such a case exhibits an approximately constant, negative and extremely small value. The strain over the entire part of the cable core owing to a temp. change is thus decreased.

Inventors

• 👤 Shigeru Tomita
• 👤 茂 冨田
• 👤 Hiromichi Shinohara
• 👤 篠原　弘道
• 👤 Masaaki Kawase
• 👤 川瀬　正明
• 👤 Fumihiro Nihei
• 👤 二瓶　文博

Bibliographic Details