Tuning of optical dispersion by using a tunable fiber bragg grating
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United States of America Patent
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-
Sep 17, 2002
Grant Date -
Sep 13, 2001
app pub date -
Apr 6, 2001
filing date -
Dec 15, 1997
priority date (Note) -
Expired
status (Latency Note)
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Abstract
Techniques and devices based on a wave-guiding element which has a spatial grating pattern that is an oscillatory variation along its optic axis. The wave-guiding element is configured to receive an input optical signal and to produce an output optical signal by reflection within a Bragg reflection band produced by the spatial grating pattern so as to produce time delays of different reflected spectral components as a nonlinear function of spatial positions along said optic axis at which the different reflected spectral components are respectively reflected. Such a wave-guiding element may be a nonlinearly chirped fiber grating A control unit may be engaged to the wave-guiding element and is operable to change a property of the spatial grating pattern along the optic axis to tune at least relative time delays of the different reflected spectral components nonlinearly with respect to wavelength.
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