Patent
Chromatic dispersion compensated optical fiber communication system
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TLDR
In this paper, the dispersion compensating (DC) optical fiber is selected such that its chromatic dispersion (DDC) and first derivative of the chromatic distribution with respect to wavelength (D'DC (λ)) at a wavelength λ =λop have opposite sign from those of the conventional single mode (SM) optical fibers.Abstract:
An optical fiber communication system according to the invention comprises, in addition to conventional single mode (SM) optical fiber, dispersion compensating (DC) optical fiber. The DC fiber is selected such that its chromatic dispersion (DDC (λ)) and first derivative of the chromatic dispersion with respect to wavelength (D'DC (λ)) at a wavelength λ=λop have opposite sign from those of the SM fiber. Advantageously, the DC fiber is selected such that LDC ·DDC (λ)+L·D(λ) is approximately zero at λ=λop, and such that D'DC (λ) is approximately equal to --(L/LDC)·D'(λ) at λ=λop, where LDC and L are appropriate lengths of DC and SM fiber, respectively. Typically, L is much greater than LDC, and λop typically is about 1.5 μm, e.g., about 1.56 μm. Preferred embodiments of the invention have low chromatic dispersion over a substantial wavelength region (e.g., dispersion less than 1.5 ps/nm·km over at least 50 nm) that includes λo, facilitating wavelength division multiplexing.read more
Citations
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