Optical waveguides – With optical coupler – Input/output coupler
Reexamination Certificate
2005-03-29
2005-03-29
Williams, Joseph (Department: 2879)
Optical waveguides
With optical coupler
Input/output coupler
C438S031000
Reexamination Certificate
active
06873762
ABSTRACT:
An apparatus and method for forming a Bragg grating on an optical fiber using a phase mask to diffract a beam of coherent energy and a lens combined with a pair of mirrors to produce two symmetrical virtual point sources of coherent energy in the plane of the optical fiber. The two virtual light sources produce an interference pattern along the optical fiber. In a further embodiment, the period of the pattern and therefore the Bragg wavelength grating applied to the fiber is varied with the position of the optical fiber relative the lens.
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Y. Wang, J. Grant, A. Sharma, & G. Myers; Modified Talbot Interferometer for Fabrication of Fiber-Optic Grating Filter Over a Wide Range of Bragg Wavelength and Bandwidth Using a Single Phase Mask; Journal of Lightwave Technology; pp. 1569-1573; Oct. 2001; vol. 19, No. 10.
Grant Joseph
Sharma Anup
Wang Ying
Hunt, Jr. Ross F.
Macchiarolo Peter
McGroary James J.
The United States of America as represented by the Administrator
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