Near-ultra-violet formation of refractive-index grating using ph

Details Near-ultra-violet formation of refractive-index grating using ph Near-ultra-violet formation of refractive-index grating using ph

1997-07-24

1999-03-09

Lee, John D.

Optical waveguides

With optical coupler

Input/output coupler

359566, 430290, 430321, G02B 634

Patent

active

058811869

ABSTRACT:
A grating is induced in the core of a hydrogen-loaded high-germanium-content optical fiber using near-UV (275 nm-390 nm) laser light. An interference is generated at the core using a molded polymer phase mask with a square wave surface relief pattern. The light is directed through the phase mask, through a protective fiber coating, through the cladding, and into the core. The phase mask generates an interference pattern with a period half that of the surface relief pattern. Index of refraction changes occur at the bright fringes of the interference pattern--thus creating the grating. Advantages over existing mid-UV technology include lower fabrication costs for phase masks, simplified grating induction since fiber coatings do not need to be removed, and reduced infrared absorption caused by grating formation fiber.

REFERENCES:
patent: 4329385 (1982-05-01), Banks et al.
patent: 4474427 (1984-10-01), Hill et al.
patent: 5066133 (1991-11-01), Brienza
patent: 5104209 (1992-04-01), Hill et al.
patent: 5178978 (1993-01-01), Zanoni et al.
patent: 5262893 (1993-11-01), Shrauger et al.
patent: 5287427 (1994-02-01), Atkins et al.
patent: 5327515 (1994-07-01), Andeson et al.
patent: 5351321 (1994-09-01), Snitzer et al.
patent: 5367588 (1994-11-01), Hill et al.
patent: 5604829 (1997-02-01), Bruesselbach
patent: 5620495 (1997-04-01), Aspell et al.
patent: 5652818 (1997-07-01), Byron
patent: 5745615 (1998-04-01), Atkins et al.
patent: 5745617 (1998-04-01), Starodubov et al.
Starodubov et al, "Bragg grating fabrication in germanosilicate fibers by use of near-UV light: a new pathway for refractive-index changes," Optics Letters, vol. 22, No. 14, Jul. 15, 1997, pp. 1086-1088.
Dianov and Stardubov, "Microscopic Mechanisms Of Photosensitivity In Germanium-Doped Silica Glass", SPIE Proc. 2777, pp. 60-70 (1995) (Sep.).
Meltz, Morey and Glenn, "Formation Of Bragg Gratings In Optical Fibers By A Transverse Holograhic Method", Optics Letters, vol. 14, No. 15, pp. 823-825 (Aug. 1, 1989).
Atkins and Espindola, "Photosensitivity And Grating Writing In Hydrogen Loaded Germanosilicate Core Optical Fibers at 325 and 351 nm", Appl/Phys. Lett. 70 (9), pp. 1068-1069 (Mar. 3, 1997).
Kashyap, "Photosensitive Optical Fibers: Devices and Applications", Optical
Dianov, Starodubov, Vasiliev, Frolov and Medvedkov, "Near-UV Photosensitivity Of Germanosilicate Glass: Application For Fiber Grating Fabrication," 9th Annual Meeting of IEEE Lasers and Electro-Optics Society, 1996 Annual Meeting (Nov. 1996), pp. 374-375.
Dianov, Kurkov, Medvedkov and Vasil'ev, "A New Sensitive Method For Measuring Induced Refractive Index Change In Optical Fiber Core", Photosensitivity and Quadratic Nonlinearity in Glass Waveguides (Fundamentals and Applications), Optical Society of America, 1995 Technical Digest Series, vol. 22 (Sep. 1995), 4 pp.

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