Patent ID: 7587112
Filing Date: 2009-09-08
Classification: G11B

Abstract:
1. An optical device, comprising: a light dividing section capable of dividing a light beam having a first waveband into a plurality of second waveband; and a wavelength-to-spatial-position-converter capable of converting said light beams having a first waveband and second wavebands into spatially spread light beams; wherein said light beam having a first waveband is a channel waveband of wavelength division multiplexing optical transport system; said spatially spread light beams are spread so that the spatially position occupied by a component of said spread light beams and a wavelength component of said light beams are correlated, and spatially width occupied by a light beam is proportional to the width of the wavelength range included said light beam; and said light dividing section and said wavelength-to-spatial-position-converter are arranged so that sum of the spatially width occupied by said a plurality of light beam having second wavebands are narrower than the spatially width occupied by said light beam having a first waveband.