| 摘要 |
PROBLEM TO BE SOLVED: To provide an optical equalizer capable of generating a desired negative dispersion of a signal wavelength by applying a negative temperature gradient to a diffraction grating. SOLUTION: The optical equalizer is provided with: an input/output terminal which inputs and outputs an optical signal; an optical waveguide having a diffraction grating causing a Bragg reflection on the input optical signal from the input/output terminal; and a temperature gradient applying means which applies the negative temperature gradient in the propagating direction of the input optical signal of the optical waveguide. COPYRIGHT: (C)2008,JPO&INPIT |
