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1. (WO2018198927) N×N OPTICAL SWITCH

Pub. No.:    WO/2018/198927    International Application No.:    PCT/JP2018/016131
Publication Date: Fri Nov 02 00:59:59 CET 2018 International Filing Date: Fri Apr 20 01:59:59 CEST 2018
IPC: G02F 1/313
G02B 6/125
Applicants: NIPPON TELEGRAPH AND TELEPHONE CORPORATION
日本電信電話株式会社
Inventors: MURANAKA Yusuke
村中 勇介
NAKAHARA Tatsushi
中原 達志
HASHIMOTO Toshikazu
橋本 俊和
Title: N×N OPTICAL SWITCH
Abstract:
The present invention implements an N×N optical switch capable of reducing intersection loss in ports, to which an optical waveguide having a maximum number of intersections and the highest intersection loss is connected, of an optical switch configured by connecting output ports of input-side optical switches and input ports of output-side optical switches by means of optical waveguides on the same substrate. A 4×4 optical switch (10) is provided with four input-side 1×4 optical switches (SW11-SW14) each having four output ports (P1-P4), four output-side 4×1 optical switches (SW21-SW24) each having four input ports (Q1-Q4), and connection optical waveguides (OW) connecting the output ports and the input ports, wherein some of the connection optical waveguides OW intersect two or more other connection waveguides OW at one point.