Method of determining the zero dispersion wavelength of an...

Details Method of determining the zero dispersion wavelength of an... Method of determining the zero dispersion wavelength of an...

H - Electricity

04

B

H04B 10/08 (2006.01) G01M 11/00 (2006.01)

Patent

CA 2145805

It is necessary to know the zero dispersion wavelength .lambda.0, to ensure the reliable transmission of high bit-rate frequency signals via remote transmissionpaths. The method for determining the zero dispersion wavelength of an optical waveguide knowingly utilizes a disturbing effect that is undesirable in optical communications transmission techniques, which is able to lower the transmission quality. This effect is the so-called four-wave mixing, or in special cases a partially degenerated four-wave mixing. The method couples two light signals of different wavelengths (.lambda.1, .lambda.2) into an optical waveguide (4). A mixing product which occurs in the optical waveguide as a result of a partially degenerated four- wave mixing is evaluated by an analyzer (3). The wavelength of one of the two light signals is selectively varied until the optical output of the mixing product reaches a maximum. At that point the wavelength of this light signal coincides with the zero dispersion wavelength .lambdaØ

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