Optical switching apparatus

Number of patents in Portfolio can not be more than 2000

United States of America

PATENT NO 12181737
APP PUB NO 20230097851A1
SERIAL NO

17766454

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Abstract

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A low-loss optical switch device with a smaller number of ports for an optical switch in a network and node device capable of transmitting OCS-type and OPS-type optical signals is provided. The optical switch device includes: a high-speed add/drop optical switch composed of a plurality of optical switches, the optical switch having an optical waveguide structure made of a material whose refractive index or absorption coefficient changes on the order of nanoseconds, and the optical switch changing the refractive index or the absorption coefficient to perform switching of both OCS optical signals, which are optical-circuit-switching-type optical signals, and OPS optical signals, which are optical-packet-switching-type optical signals; and a plurality of circulators connected to an input port and an output port of the high-speed add/drop optical switch.

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Patent Owner(s)

Patent OwnerAddress
NIPPON TELEGRAPH AND TELEPHONE CORPORATIONCHIYODA-KU TOKYO 100-8116

International Classification(s)

Inventor(s)

Inventor Name Address # of filed Patents Total Citations
Hashimoto, Toshikazu Musashino, JP 94 467
Muranaka, Yusuke Musashino, JP 17 13
Sakamaki, Yohei Musashino, JP 14 129

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