Controlled phase delay between beams for writing bragg gratings

Details Controlled phase delay between beams for writing bragg gratings Controlled phase delay between beams for writing bragg gratings

2006-03-28

2006-03-28

Angebranndt, Martin (Department: 1756)

Radiation imagery chemistry: process, composition, or product th

Holographic process, composition, or product

C430S002000, C430S290000, C430S945000, C385S037000

Reexamination Certificate

active

07018745

ABSTRACT:
A method of writing an extended grating structure in a photosensitive waveguide comprising the steps of utilizing at least two overlapping beams of light to form an interference pattern, moving the waveguide through said overlapping beams, simultaneously controlling a relative phase delay between the beams utilising a phase modulator, thereby controlling the positions of maxima within said interference pattern to move at approximately the same velocity as the photosensitive waveguide, wherein the phase modulator does not comprise a mechanical means for effecting the phase modulation, and modifying the relative phase delay between the beams during the writing of the grating structure, whereby a deliberate detuning of the velocity of the positions of maxima within said interference pattern and the velocity of the photosensitive waveguide is utilized to vary a period of the written grating structure in the photosensitive waveguide.

REFERENCES:
patent: 4432239 (1984-02-01), Bykov
patent: 4954789 (1990-09-01), Sampsell
patent: 5066133 (1991-11-01), Brienza
patent: 5128693 (1992-07-01), Tatemichi et al.
patent: 5182455 (1993-01-01), Maraki
patent: 5388173 (1995-02-01), Glenn
patent: 5640239 (1997-06-01), Takamiya et al.
patent: 5754282 (1998-05-01), Kato et al.
patent: 2 768 819 (1999-03-01), None
patent: 54-100752 (1979-08-01), None
patent: 96/36895 (1996-11-01), None
patent: 97/21120 (1997-06-01), None
patent: 97/26570 (1997-07-01), None

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