Patent ID: 7187814
Filing Date: 2007-03-06
Classification: G02F,H04J

Abstract:
1. An optical add/drop device for adding/dropping an optical signal having a predetermined wavelength to/from a wavelength multiplexed optical signal which flows from a network, comprising: a dropping unit for dropping an input wavelength multiplexed optical signal; a splitting unit for splitting an optical signal having a predetermined wavelength from a first optical signal dropped by said dropping unit; a rejecting unit, which is configured by an acousto-optic tunable filter, for selecting a through optical signal by applying a corresponding RF signal to the acousto-optic tunable filter, for rejecting an optical signal to be rejected by storing an RF signal applied to the acousto-optic tunable filter, and for rejecting an optical signal having a same wavelength as that of an optical signal to be added from a second optical signal dropped by said dropping unit; and an adding unit for adding an optical signal having a predetermined wavelength to the optical signal which passes through said rejecting unit; a transponder unit for generating the light to be added, wherein said transponder unit comprises: