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

1992-05-29

1993-06-08

Gonzalez, Frank

Optical waveguides

With optical coupler

Particular coupling structure

385 37, 385 31, 385 24, G02B 634

Patent

active

052186555

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.

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patent: 5022730 (1991-06-01), Cimini et al.
patent: 5140656 (1992-08-01), Hasegawa et al.
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"Bragg Grating Formation and Germanosilicate Fiber Photosensitivity", by G. Meltz et al., SPIE, vol. 1516, International Workshop on Photoinduced Self-Organization in Optical Fiber, May 10-11, 1991, Quebec City, Canada, 16 pages.
"Shifts in Resonance Wavelengths of Bragg Gratings During Writing or Bleaching Experiments by UV Illumination Within Germanosilicate Optical Fibre", by E. Fertein, Electronics Letters, vol. 27, No. 20, Sep. 26, 1991, pp. 1838-1839.
"Photosensitivity in Optical Fiber Waveguides: Application to Reflection Filter Fabrication", by K. O. Hill et al., Applied Physics Letters, vol. 32(10), May 15, 1978, p. 647.

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