Optics: measuring and testing – By light interference – Using fiber or waveguide interferometer
Reexamination Certificate
2005-09-06
2005-09-06
Lee, Andrew H. (Department: 2877)
Optics: measuring and testing
By light interference
Using fiber or waveguide interferometer
C356S517000, C356S073100
Reexamination Certificate
active
06940601
ABSTRACT:
The present invention provides a method and apparatus for obtaining a measure of the chromatic dispersion of a fibre bragg grating, the method comprising: disposing the grating in a reflection arm of an interferometer; inputting probe laser light into the interferometer; stepping the wavelength of the light across the reflection bandwidth of the grating, while at each step modulating the wavelength by a wavelength modulation less than the size of the respective step, and thereby producing a resulting phase modulation; and demodulating the phase modulation and determining therefrom a measure of the chromatic dispersion.
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Englund Mark Andrew
Magi Eric Carl
Defence Science and Technology Organisation
Ladas & Parry LLP
Lee Andrew H.
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