Optical waveguides – With optical coupler – Input/output coupler
Patent
1998-09-09
2000-03-14
Sanghavi, Hemang
Optical waveguides
With optical coupler
Input/output coupler
385123, 359569, G02B 634
Patent
active
060383585
ABSTRACT:
A photosensitive optical fiber being scanned by an ultraviolet beam to form an optical filter is aligned with the beam by detecting fluorescence produced in the fiber. The relative position of the fiber and beam is made to oscillate in a direction perpendicular to the scanning direction. Misalignment is corrected according to the phase relationship between the fluorescence detection signal and the oscillation, permitting the alignment to be controlled accurately regardless of the beam dimensions, scanning distance, scanning rate, and natural fluorescence variations.
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Inoue et al., Fiber Bragg grating and its applications, Oyo Butsuri, vol. 66, No. 1, 1997, pp. 33-36.
Anderson et al., "Production of in-fibre gratings using a diffractive optical element", Electronics Letters, vol. 29, No. 6, Mar. 18, 1993, pp. 566-568.
Komukai et al., "Fabrication of high-quality fiber gratings by the fluorescence monitoring method", Ninth Meeting on Applied Fiber Optic Technology, pp. 1-4, 1983.
Frank Robert J.
OKI Electric Industry Co., Ltd.
Sanghavi Hemang
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