Optical switching system for optical wavelength-division and time-division multiplexed signals

Assignee: NEC Corp

•

Filing: 1992-02-13

•

Granted: —

•

Expires: 2012-02-13

📄 Original PDF 🌐 Google Patents 🔄 Sync Now

Abstract

Abstract An optical switching system for optical wavelength-division and time-division multiplexed signals includes a plurality of tunable wavelength filters (221-226) each of which selects a signal having a desired wavelength from an optical wavelength-division and time-division multiplexed signal, a plurality of optical memory elements (231-236) each of which is supplied with an output signal of each of the plurality of tunable wavelength filters. Each optical memory element memorizes a light intensity of the output signal by being applied with a first control voltage and supplies an output port with the output signal which is converted to have a predetermined wavelength in a desired time slot. The tunable wavelength filters (221-226) and optical memory elements (231-236) may by replaced by wavelength filters and tunable wavelength optical memories.

Inventors

👤 Makoto Nishio
👤 Takahiro Numai

Bibliographic Details

Application Number —

Jurisdiction EP

Data Source google_patents

Last Synchronized 2026-11-08 10:40

CPC Classifications

H; H04; H04Q; H04Q11/00; H04Q11/0001; H04Q11/0005; H04Q2011/0007; H04Q2011/002

Claims Analysis

Total Claims: 3

Claim 1

Independent Claim 114 words

An optical switching system for optical wavelength-division and time-division multiplexed signals, comprising: a plurality (n) of tunable wavelength filters each of which selects a signal having a desired wavelength from an optical wavelength-division and time-division multiplexed signal in every time-slot; and a plurality (n) of optical memory elements each of which is supplied with an output signal of each of said plurality (n) of tunable wavelength filters, each of said plurality (n) of optical memory elements memorizing a light intensity of said output signal by being applied with a first control voltage and supplying an output port with said output signal which is converted to have a predetermined wavelength in a desired time slot.

Claim 2

Dependent Claim 113 words

An optical switching system for optical wavelength-division and time-division multiplexed signals, comprising: a plurality (n) of wavelength filters each of which selects a signal having a predetermined wavelength from an optical wavelength-division and time-division multiplexed signal; and a plurality (n) of tunable wavelength optical memory elements each of which is supplied with an output signal of each of said plurality (n) of wavelength filters, each of said plurality (n) of tunable wavelength optical memory elements memorizing a light intensity of said output signal by being applied with a first control voltage and supplying an output port with said output signal which is converted to have a desired wavelength in a desired time slot.

Claim 3

Dependent Claim 123 words

An optical switching system for optical wavelength-division and time-division multiplexed signals, comprising: a plurality (k × ℓ × m) of optical switches each of which selectively supplies an output signal at a desired time slot from an optical wavelength-division and time-division multiplexed signal; a plurality (k × ℓ × m) of tunable wavelength filters each of which selects a signal having a desired wavelength from said optical wavelength-division and time-division multiplexed signal in every time-slot; and a plurality (k × ℓ × m) of optical bistable elements each of which keeps supplying an output signal of each of said plurality (k × ℓ × m) of tunable wavelength filters for a desired period, said output signal being converted to have a predetermined wavelength.

References Cited (Backward Citations)

No citation records indexed.

USPTO Annuity & Maintenance Windows

Maintenance schedule is calculated for granted US utility patents.

Assigned Categories & Tags

No categories assigned to this patent yet.

Assign Category Tag

Select Category

Notes (Optional)