Fluid filled optical waveguide.

摘要

An optical waveguide hose includes a hollow tubular cladding (1) made of a material having rubber elasticity at the service temperature. The cladding (1) is filled with a core fluid (2) having a higher index of refraction than the cladding (1) and closed with sealing plugs (3) at opposed open ends. The hose is improved in flexibility and handling, prevents gas penetration into the core fluid (2), maintains transparency at widely varying temperature over a long time, and is lightweight and inexpensive.