Wavelength dispersion compensating apparatus
a compensating apparatus and wavelength technology, applied in the field of wavelength dispersion (chromatic dispersion) compensating apparatus, can solve the problems of deteriorating signal quality in the system, distortion of pulse waveform, and high manufacturing cost of dispersion compensating fibers
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[0053]FIG. 1 is a perspective view showing a configuration of a wavelength dispersion (chromatic dispersion) compensating apparatus according to the present invention.
[0054] In FIG. 1, the wavelength dispersion compensating apparatus of the present embodiment comprises for example: a VIPA plate 10; an optical system consisting of an optical fiber 1, a collimate lens 2, and a cylindrical lens 3, which permits a WDM light condensed on one segment to be incident on a transmission area 14 of the VIPA plate 10; a variable dispersion diffraction grating 20 which is given with a light multi-reflected by the VIPA plate 10 and emitted from one of planes of the VIPA plate 10; and a light return apparatus 30 which reflects the light which has passed through the variable dispersion diffraction grating 20 and returns it to the VIPA plate 10 via the variable dispersion diffraction grating 20.
[0055] As with the conventional configuration shown in the above described FIG. 18, the VIPA plate 10 has...
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