BAND-PASS WIDTH VARIABLE OPTICAL FILTER - Nippon Telegraph and Telephone Corporation

Title:

BAND-PASS WIDTH VARIABLE OPTICAL FILTER

Document Type and Number:

Japanese Patent JP3048039

Kind Code:

B2

Abstract:

PURPOSE: To realize a band=pass width variable optical filter capable of varying a band-pass width without using a mechanical movable mechanism and separating one or plural channels from a wavelength multiplexed signal beam as necessary.
CONSTITUTION: In an array waveguide type optical filter, core opening widths of respective waveguides 11a-11d of an inputting channel waveguide in a boundary between the inputting channel waveguide 11 and a first sector slab waveguide 12 are different from each other, and further, the core opening widths of respective waveguides of outputting channel waveguides 15a-15d in the boundary between a second sector slab waveguide 14 and the outputting channel waveguide 15 are different from each other, and waveguide type optical switches 21-26 are connected to the inputting channel waveguide 11 and the outputting channel waveguide 15 in cascade respectively.

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Inventors:

Katsunari Okamoto
Koichi Takiguchi
Tomoki Machida

Application Number:

JP1419495A

Publication Date:

June 05, 2000

Filing Date:

January 31, 1995

Export Citation:

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Assignee:

Nippon Telegraph and Telephone Corporation

International Classes:

G02B6/12; G02F1/01; H04B10/00; H04B10/40; H04B10/50; H04B10/60; H04J14/00; H04J14/02; (IPC1-7): G02F1/01; G02B6/12; H04J14/00; H04J14/02

Domestic Patent References:

JP8146470A
JP7333447A
JP876154A

Attorney, Agent or Firm:

Furuya Fumio

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