Patent ID: 6952509
Filing Date: 2005-10-04
Classification: G02B

Abstract:
1. A wavelength dispersion compensator for compensating wavelength dispersions of wavelength division multiplexed (WDM) optical signals which have been propagated through an input optical transmission line, comprising: plural fiber gratings of a reflection type which reflect said WDM optical signals at different positions depending on wavelengths of said reflected optical signals; a circulator comprising an input terminal and an output terminal, said input terminal being connected with said input optical transmission line, said input terminal and output terminal being in communication with said plural fiber gratings of a reflection type, and said output terminal being connected with one of an output optical transmission line and an output optical waveguide; and an optical repeater and a gain equalizer connected in series, wherein an input terminal of said optical repeater is connected with said output terminal of said circulator, an input terminal of said gain equalizer is connected with an output terminal of said optical repeater, and an output terminal of said gain equalizer is connected with one of said output optical transmission line and said output optical waveguide, and wherein a number of said plural fiber gratings which is at least equivalent to a number of said optical signals are connected in series.