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US 6,154,588 AGranted
Dispersion compensation apparatus
AssigneeFujitsu Limited
InventorYutaka Kai
Life of this patent
Estimating the term…
Abstract
Dispersion compensation having a flat loss characteristic is performed. Overall wavelength dependence is made flat by using a passive device, such as a fiber Bragg grating having a transmission characteristic compensating for the wavelength dependent loss characteristic of a dispersion-compensating fiber, or an optical amplifier having a gain characteristic compensating for the wavelength dependent loss characteristics.
Claims24
A dispersion-compensation apparatus comprising:
- a dispersion-compensating fiber compensating a chromatic dispersion in an optical transmission line, the dispersion-compensating fiber having a transmission characteristic introducing uneven losses in a signal transmitted therethrough;
- and
- a compensating element having a transmission characteristic effectively canceling out the losses introduced by the transmission characteristic of the dispersion-compensating fiber and thereby compensating for wavelength dependent losses in said dispersion-compensating fiber, so that the wavelength division multiplexing signal substantially free from loss differences at different wavelength is output therefrom.
Dependencies are inferred from the claim text.