Article comprising an optical waveguide with in-line refractive

Details Article comprising an optical waveguide with in-line refractive Article comprising an optical waveguide with in-line refractive

1993-04-22

1994-08-09

Gonzalez, Frank

Optical waveguides

With optical coupler

Input/output coupler

372102, 359130, 359569, 359572, G02B 634

Patent

active

053373820

ABSTRACT:
Broadband in-line gratings in optical waveguides are disclosed. The gratings have a bandwidth of at least 2 nm (preferably at least 4 nm) and a peak reflectivity of at least 70% (preferably at least 90%). Exemplarily, such gratings can be formed in H.sub.2 -treated Si-based fibers that support a normalized index change of at least 10.sup.-3. Gratings according to the invention can be used, for instance, to form pump radiation reflectors in an optical fiber communication system with Er-doped fiber amplifiers, or to flatten the amplifier gain curve. The gratings can be of the blazed or non-blazed type.

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