Patent ID: 6185358
Filing Date: 2001-02-06
Classification: G02B

Abstract:
An optical attenuator, comprising:an optical cable, comprising:an optical fiber having a core and a cladding surrounding said core, the refractive indices of said core and said cladding allowing total reflection of light in the core;a first grating in said optical fiber in which the refractive indices of said core and said cladding are sufficiently similar such that total reflection of light in the core does not occur, said first grating having a length in the range of approximately 1 cm to 5 cm; anda tube jacketing said optical fiber, for protecting the optical fiber from ambient conditions;a first connector installed at one end of the optical cable, for connecting to an optical transmission box; anda second connector installed at the other end of the optical cable, for connecting to an optical distribution box.