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JPH0572575A Expired / Lapsed JP ⏱️ 0.0 years remaining

Waveguide type matrix optical switch

Assignee: NTT Inc
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Filing: 1992-03-16
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Granted: —
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Expires: 2012-03-16
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Abstract

Abstract Translated from Japanese (57)【要約】 【構成】 基板(11)の上で光導波路(31a−31 b,32a−32b)を2箇所で互いに近接させて、2 個の方向性結合器(33a,33b)とし、該2個の方 向性結合器(33a,33b)間の2本の光導波路(3 1a−31b,32a−32b)の少なくとも一方に、 光位相シフタ(34a)を設けたマッハツェンダ光干渉 計回路をスイッチ要素とする導波路型マトリックス光ス イッチ。スイッチ要素内の2個の方向性結合器(33 a,33b)の間の2本の光導波路(31a−31b, 32a−32b)の実効光路長差が、スイッチオフ状態 で信号光波長の2分の1に設定され、しかも光スイッチ 要素内の前記2本の光導波路が、互いに交差している。 【効果】 方向性結合器の結合率設定誤差に強く、消光 比の優れた導波路型マトリックス光スイッチを提供でき る。 (57) [Summary] [Structure] On the substrate (11), the optical waveguides (31a-31) b, 32a-32b) in close proximity to each other at two locations, Number of directional couplers (33a, 33b), and two optical waveguides (3) between the two directional couplers (33a, 33b). 1a-31b, 32a-32b), A waveguide-type matrix optical switch having a Mach-Zehnder optical interferometer circuit provided with an optical phase shifter (34a) as a switch element. Two directional couplers (33 a, 33b) between the two optical waveguides (31a-31b, The effective optical path length difference 32a-32b) is set to ½ of the signal light wavelength in the switch-off state, and the two optical waveguides in the optical switch element intersect with each other. [Effect] It is possible to provide a waveguide type matrix optical switch that is resistant to a coupling rate setting error of a directional coupler and has an excellent extinction ratio.

Inventors

  • 👤 Masayuki Okuno
  • 👤 将之 奥野
  • 👤 Kuniharu Kato
  • 👤 邦治 加藤
  • 👤 Katsumi Kato
  • 👤 勝己 加藤
  • 👤 Masao Kawachi
  • 👤 正夫 河内

Bibliographic Details

Application Number —
Jurisdiction JP
Data Source google_patents
Last Synchronized 2026-11-04 09:09
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