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US 7,397,981 B2Granted
Apparatus and method of compensating for wavelength dispersion of optical transmission line
AssigneeFujitsu Limited
InventorsShinya Inagaki, Hisashi Takamatsu, Kazuo Yamane, Takashi Tsuda
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Abstract
Both wavelength dispersion and a dispersion slope of a line fiber are simultaneously compensated for by combining two types of dispersion compensators having different characteristics.
Claims13
An apparatus comprising:
- a first compensator compensating wavelength dispersion, the first compensator having a constant wavelength dispersion characteristic over a plurality of wavelengths;
- and
- a second compensator compensating wavelength dispersion after wavelength dispersion is compensated by the first compensator, wherein the first and second compensators together compensate for wavelength dispersion dependent on a respective wavelength of a transmission line,
- wherein the first compensator is a virtually imaged phased array (VIPA) dispersion compensator.
1 more element
An apparatus comprising:
- first means for compensating wavelength dispersion, the first means having a constant wavelength dispersion characteristic over a plurality of wavelengths;
- and
- second means for compensating wavelength dispersion after wavelength dispersion is compensated by the first means, wherein the first and second means together compensate for wavelength dispersion dependent on a respective wavelength of a transmission line,
- wherein the first means is a virtually imaged phased array (VIPA) dispersion compensator.
1 more element
An apparatus comprising:
- a first compensator compensating for wavelength dispersion, the first compensator having a constant wavelength dispersion characteristic over a plurality of wavelengths;
- and
- a second compensator compensating for dispersion slope over the plurality of wavelengths after the compensation by the first compensator.
Dependencies are inferred from the claim text.