Optical fiber filter

Details Optical fiber filter Optical fiber filter

1996-10-21

1998-03-24

Healy, Brian

Optical waveguides

With optical coupler

Particular coupling function

385 28, 385 31, 385 37, 385123, 385124, 385 96, 385 98, G02B 626

Patent

active

057321701

ABSTRACT:
The present invention relates to an optical fiber filter provided with a portion which selectively reflects or transmits light of a specific wavelength, this portion comprised of a multimode optical fiber in which the refractive index of the core changes periodically along the longitudinal direction thereof. Furthermore, this multimode optical fiber has an input end and an output end, with at least the input end of the multimode optical fiber being connected to a single mode optical fiber. As a result of forming an optical fiber filter in this way, it is possible to realize an optical fiber filter that exhibits no transmission loss at wavelengths other than the center wavelength.

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